Delivered-To: oc.tjphuhs@gmail.com Received: by 2002:a54:2b46:0:b0:2c4:e372:78d6 with SMTP id y6csp1464890ecr; Thu, 26 Mar 2026 10:29:09 -0700 (PDT) X-Received: by 2002:a05:690c:883:b0:798:6c28:dd68 with SMTP id 00721157ae682-79acf6f55demr93311627b3.54.1774546149126; Thu, 26 Mar 2026 10:29:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1774546149; cv=none; d=google.com; s=arc-20240605; b=hFF7u4ACF1VA7a5O4ofosWa7beyIs5CceMetIGqijDhaszHTAb4QMSVnH4koyHdgDL txHRQAsI86ISR/LlLn1Lu6aEwnxOhlWevVBi1OXUf/kmIkseKUs6tiH8b+GQKAtL8kZm U1SFP/mrS8F1qyDllFzycsLu4Yi4/7vgCBNCk8A1W2gfOnjbDvSfqfeSPLroPYAvgC2H q5M2Tfxbb2WCOhrnlLdt8vNcRjSZIjMIle3Jc2FI/ZIZrqI7SVBUR9hTaTFmbY8MCgeB fF1MquKV72yY2/wfhTSkP1aTf8tKeLI8FPvnmWenj9sv2ANRYTIncLspVerntwbVs9h2 uZfw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=mime-version:subject:references:in-reply-to:message-id:to:from:date :dkim-signature; bh=MZvYF9EKym06tBkrrA43dNHFDgmmWEtT7Av5OTLgNX8=; fh=F6Qtq/PC/9aW+A0Z/30DYnuZeFJIQSXKTJRrYsjMofs=; b=F2yS51gkr8IAa4Ih7DbyERRT5I5CfJ7EnMDtik/iZXa3I2dSPWg1Q8eT7NkqkOZu2c NQ+qKh/kLs7Bz8vBN9kochok6ahcTcOmSWAfRxw8e+4JMyyKQNz/oSKsJFEAynE9DSzw RVvijnSrphi56cLPGkx4nrOySdr/lToSIsoP7XozjHuZwH2Qu6t42+N+5Lge8dqCAukX yD/+9GNKgUb68dnLayceUfJD1RK8EgdhlJdGXvMJxezlXbrm/VMhtM6bos3DPXCsJwMT IvZ3nG6RysqbJNz7bGuK+OBpTaXIkCmSR8UyvkIAYa/uWawUGeywHQRz6koC5Ux1Y0Bt oKiQ==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20251104 header.b=FEYIUpfx; spf=pass (google.com: domain of tjphuhs@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=tjphuhs@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@gmail.com Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id 00721157ae682-79b1e3f747csor21285647b3.9.2026.03.26.10.29.08 for (Google Transport Security); Thu, 26 Mar 2026 10:29:09 -0700 (PDT) Received-SPF: pass (google.com: domain of tjphuhs@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20251104 header.b=FEYIUpfx; spf=pass (google.com: domain of tjphuhs@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=tjphuhs@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774546148; x=1775150948; dara=google.com; h=mime-version:subject:references:in-reply-to:message-id:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=MZvYF9EKym06tBkrrA43dNHFDgmmWEtT7Av5OTLgNX8=; b=FEYIUpfx3NXFneLt9leHYlK/axcmJmzh3/z/Mnb+KY+vm58ex2Kw7hbW1Pto1hTHMp K8ZruRsOWe1aTxVE7934iElZRASAm6ibnwgyTkhGWSCYx7LFTSIuhbuaMqMQmz/2eP+r 8VmgQgK7LsjvVaCGhJARjFNlpQcQMWC1QZN+LjSf1c0P0sX1eAooYq9+NVQwA7JkEuVC Yg+LQ3Gw/3z2YYp+TfAK9FjlssmvXm+TvefphVAusmE/VVz254sXzZeIgX2SLIxZVZym 30jYEu50s6nv/+c0azMai5RDeJscxJ4uFiQoKrcLnlxI+PLIfgniomI/9XJQ39r8XEHG 4NUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774546148; x=1775150948; h=mime-version:subject:references:in-reply-to:message-id:to:from:date :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=MZvYF9EKym06tBkrrA43dNHFDgmmWEtT7Av5OTLgNX8=; b=ExhEmmrac7AF4ftlfeck+TgkxiAbZsjN/ax/B5XxsTvncSZ82nCBzcJ4SlMnZv8ke3 b+Hymgab+vWMwlTHH3yFiM4/eAgUHrdINDNnvULC0pvQ0DDPAviG3O7pgohF9HfQO24Z nYl88wxoOquCxxbkYh+DU/ozsjgL03he0xHnaozx2NFFkRuMDlBkvhTnvvAyN9EAqQIT SJPvKgBliq1G2hYbpY02z5zraAE4xxFjqSfmsV5ZxS3gbiE+H6F38aVI/0u9g9Xjo9Kj 6maZwztowxdWGW0X+SzxBcPw/UVrek9j9aJkYpUcq+4wvc/M34b0US1h3yDhwVCaOEbq lfTA== X-Gm-Message-State: AOJu0YztNwwvTxyBM2+Pmyk3v+nJ6m8shcof/iV+HUvw+NotQnD8UkcO QAqUmpTTZAz0XMsGiT6gHnk9CIKN/I8AdUIQdMnnscG46J0R89+6HDIkwSWSXWxN X-Gm-Gg: ATEYQzwovr3BcUEDIu0RLMypqOXAzqiwrnRs3o6HUIcfYXIRlGPhePpwtm/4MJTWuAJ ROt8kqBpzVTPXtZdAV2XgLZsMLtHsb3QznvDWSJaaP84jiiidMt6/Tm60lKcIlRRvPV/Ie9HqpF COy7Cc7b61/1q/jGT7DsLNmZBg6lEmL2vp3ZUxDnRY8Ns0DA9+w4jpTGa2RdxZcbqnnB4SRzEFt WSeegLdj9+03DnxtftQdtNHIcRTz79SXC8jATFVAZe5xDqznzp4SjMctp+GrO76ADLkl6QO4MKq CCRJA66JW3jBPrEk/EeOD+kUG86EI9EQ70hC8XG8Ce4KrKY+xtnioFskungIcsy4izV1Zohz8Wt VqTF1sz9IVnfmmquPHKA2FcGtkmLYtiCBSzxT2n7nrAxmZg80YrF51WwiJnkHSJopo2PcI5/fRI eBcNrrfe05COICpwsc4TBXwLp9w9kOwSTB4wzvkoMakQx9N3eLKfQcFy96V5KYmarofzsAVPW2O /k= X-Received: by 2002:a05:690c:60c6:b0:79a:8fa0:8610 with SMTP id 00721157ae682-79acf70e033mr89772097b3.61.1774546147660; Thu, 26 Mar 2026 10:29:07 -0700 (PDT) Return-Path: Received: from [2607:fb90:e204:5c1f:a078:650b:100:0] ([2607:fb90:e204:5c1f:1145:fbcb:a4b8:72b]) by smtp.gmail.com with ESMTPSA id 00721157ae682-79b10c64c21sm16166897b3.6.2026.03.26.10.29.06 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 Mar 2026 10:29:07 -0700 (PDT) Date: Thu, 26 Mar 2026 13:28:59 -0400 From: tjphuhs@gmail.com To: "=?utf-8?Q?oc.tjphuhs=40gmail.com?=" Message-ID: In-Reply-To: <20260326165137.3.0dda3d5c6e302ec6@mg-d1.substack.com> References: <20260326165137.3.0dda3d5c6e302ec6@mg-d1.substack.com> Subject: Fwd: Past, Present, and Future: How to Verify a Clean Manufacturing Process X-Readdle-Message-ID: e337402a-54cf-4339-96fd-cef70a4076ba@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="69c56ce1_389bcc47_751d" --69c56ce1_389bcc47_751d Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline ---------- =46orwarded message ---------- =46rom: Derek from Peptide Price Date: Mar 26, 2026 at 12:51=E2=80=AFPM -0400 To: tjphuhs=40gmail.com Subject: Past, Present, and =46uture: How to Verify a Clean Manufacturing= Process > When you look at a certificate of analysis, you=E2=80=99re not looking = at one thing. > =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0= =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2= =AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2= =A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87= =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F= =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80= =87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD= =8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2= =80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD= =CD=8F =C2=A0 =E2=80=87 =C2=AD=CD=8F =C2=A0 =E2=80=87 =C2=AD > =46orwarded this email=3F Subscribe here for more > Past, Present, and =46uture: How to Verify a Clean Manufacturing Proces= s > Derek > Mar 26 > > READ IN APP > > When you look at a certificate of analysis, you=E2=80=99re not looking = at one thing. You=E2=80=99re looking at a snapshot across three different= windows of time. Each test answers a completely different question =E2=80= =94 and once you understand that, a COA goes from a piece of paper with c= heck marks on it to an actual quality story. > The Past Test =E2=80=94 USP 85 (Bacterial Endotoxins Test) > In plain English: =E2=80=9CWas the manufacturing process clean and cont= rolled before it got here=3F=E2=80=9D > USP 85 is the Bacterial Endotoxins Test (BET). It checks for endotoxins= =E2=80=94 toxic remnants left behind by certain gram-negative bacteria d= uring the manufacturing process. Here=E2=80=99s the key thing most people= miss: the bacteria themselves don=E2=80=99t have to be alive or present = anymore. Even dead bacterial cells leave behind lipopolysaccharides (LPS)= that can trigger serious inflammatory responses in a research subject. > A passing USP 85 result tells you the facility that made this compound = maintained controlled, clean manufacturing conditions. It=E2=80=99s a loo= k backward =E2=80=94 at the production environment, not what=E2=80=99s in= the vial right now. > The Present Test =E2=80=94 HPLC-MS (Purity & Identity) > In plain English: =E2=80=9CIs this exactly what it=E2=80=99s supposed t= o be, and how pure is it right now=3F=E2=80=9D > High-performance liquid chromatography-mass spectrometry (HPLC-MS) is t= he gold standard identity and purity test. It confirms the compound=E2=80= =99s molecular weight, composition, and sequence, and quantifies exactly = how much of the actual compound is present versus impurities or degradati= on products. > This is the test that tells you what=E2=80=99s in the vial today. A com= pound can come from a clean facility (pass USP 85) and still be mislabele= d, misdosed, or degraded. HPLC-MS catches all of that. It=E2=80=99s the m= ost critical test on a COA, and it=E2=80=99s the one you should always lo= ok for first. > The =46uture Test =E2=80=94 USP 61 (Microbial Enumeration) > In plain English: =E2=80=9CIs anything in here that could grow or cause= problems over time=3F=E2=80=9D > USP 61 tests for the presence and count of live microbial contamination= =E2=80=94 bacteria, yeast, and mold =E2=80=94 that could proliferate ove= r time. Where USP 85 looks at manufacturing byproducts, USP 61 looks at l= iving organisms that could be introduced during filling, storage, or hand= ling. > This is the forward-looking test. A product can be clean at the time of= manufacture and still pick up contamination later. USP 61 is the standar= d microbial quality test used broadly across non-sterile pharmaceutical p= roducts and is what most research vendors use. > The Sterility Test =E2=80=94 USP 71 > In plain English: =E2=80=9CCan we confirm there are absolutely zero via= ble microorganisms present=3F=E2=80=9D > USP 71 is the sterility test =E2=80=94 it goes a step further than USP = 61 by attempting to confirm the complete absence of viable microorganisms= . This is the standard applied to products intended for injectable resear= ch and is used for injectable research compounds, biologics, and sterile = preparations. > The methodology involves incubating samples in growth media over 14 day= s to detect even a single colony-forming unit. If something grows, the ba= tch fails. It=E2=80=99s a more rigorous standard, which is exactly why it= carries different regulatory implications =E2=80=94 and why you don=E2=80= =99t see it universally across research vendors. > Quick Reference > > =E2=80=A2 > USP 85 =E2=80=94 Past =E2=86=92 Was manufacturing clean=3F > =E2=80=A2 > HPLC-MS =E2=80=94 Present =E2=86=92 Is it correct and pure = right now=3F > =E2=80=A2 > USP 61 =E2=80=94 =46uture =E2=86=92 Will anything grow over= time=3F > =E2=80=A2 > USP 71 =E2=80=94 =46uture+ =E2=86=92 Confirmed sterility (i= njectable research standard) > > Why Some Companies Opt for USP 61 Instead of USP 71 =E2=80=94 Something= to Keep in Mind > USP 61 and USP 71 are often treated as interchangeable in the research = space =E2=80=94 and from a pure microbiology standpoint, they=E2=80=99re = measuring similar things. Both look for live microbial contamination. But= there=E2=80=99s a reason some companies deliberately choose USP 61 over = USP 71, and it has nothing to do with cutting corners. > USP 71 is the sterility standard for injectable research. Performing US= P 71 testing signals =E2=80=94 or can be interpreted as signaling =E2=80=94= that a product is intended for injectable research. In a space where eve= rything is labeled research use only, not for human consumption, that dis= tinction carries real legal weight. I=E2=80=99ve spoken directly with res= earch companies whose legal teams have explicitly prohibited them from co= nducting USP 71 testing for exactly this reason =E2=80=94 not because the= test itself is problematic, but because it can be used to imply an injec= table research classification that exposes the business to regulatory ris= k. > It=E2=80=99s a fine line, and the research space is still very undefine= d. Every company is going to have a different risk tolerance and operate = accordingly. Some will opt for USP 71 and accept that tradeoff. Others wi= ll stick with USP 61 on the advice of legal counsel. Neither position is = inherently wrong =E2=80=94 it=E2=80=99s a business decision made in a spa= ce where the rules aren=E2=80=99t fully written yet. > What=E2=80=99s worth knowing: the cost difference between the two tests= is essentially zero. So when you see USP 61 on a COA, it=E2=80=99s not a= budget decision. It=E2=80=99s likely a legal one. > Keep this in the back of your mind when evaluating COAs. The presence o= f any microbial testing is a positive signal =E2=80=94 and the gap betwee= n a vendor that does microbial testing and one that doesn=E2=80=99t is fa= r more meaningful than whether they chose 61 or 71. > Next time you pull up a COA, run through the three windows mentally. US= P 85 =E2=80=94 was it made cleanly=3F HPLC-MS =E2=80=94 is it what it say= s it is right now=3F USP 61 or 71 =E2=80=94 is anything alive in there=3F= When a vendor hits all three, that=E2=80=99s a genuinely comprehensive q= uality picture. Whether they chose 61 or 71 often comes down to how they = approach the legal side of things =E2=80=94 both signal that they care ab= out sterility and bacterial growth. When a vendor is missing one of the t= hree windows entirely, you now know exactly what question isn=E2=80=99t b= eing answered. > Upgrade to paid > You're currently a free subscriber to Peptide Price. =46or the full exp= erience, upgrade your subscription. > Upgrade to paid > > Share > > > Like > Comment > Restack > > =C2=A9 2026 Derek Pruski > 548 Market Street PMB 72296, San =46rancisco, CA 94104 > Unsubscribe --69c56ce1_389bcc47_751d Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
---------- =46orwarded message ----= ------
=46rom: Derek from Peptide Price <derekpruski=40substack.com>= ;
Date: Mar 26, 2026 at 12:51=E2=80=AFPM -0400
To: tjphuhs=40gmail.com
Subject: Past, Present, and =46uture: How to Verify a Clean Manufa= cturing Process

3D=22=22
When you look at a certificate of analysis, you=E2=80=99re not l= ooking at one thing.
=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23= 160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80= =87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD= =CD=8F &=23160; =E2=80=87 =C2=AD=CD=8F &=23160; =E2=80=87 =C2=AD
=46orwarded this email=3F Subscribe here for= more

Past, Present, and =46uture: How to Verify a Clean Manufacturing P= rocess

Derek
&=23160;=
3D=22=22
3D=22=22=
3D=22=22
3D=22=22=
READ IN APP3D=
&=23160;=

When you look at a certificate of analys= is, you=E2=80=99re not looking at one thing. You=E2=80=99re looking at a = snapshot across three different windows of time. Each test answers a comp= letely different question =E2=80=94 and once you understand that, a COA g= oes from a piece of paper with check marks on it to an actual quality sto= ry.

3D=22=22

The Past Test =E2=80=94 USP 85 (= Bacterial Endotoxins Test)

In plain English: =E2=80=9CWas the manufacturi= ng process clean and controlled before it got here=3F=E2=80=9D

USP 85 is the Bacterial Endotoxins Test (BET). It chec= ks for endotoxins =E2=80=94 toxic remnants left behind by certain gram-ne= gative bacteria during the manufacturing process. Here=E2=80=99s the key = thing most people miss: the bacteria themselves don=E2=80=99t have to be = alive or present anymore. Even dead bacterial cells leave behind lipopoly= saccharides (LPS) that can trigger serious inflammatory responses in a re= search subject.

A passing USP 85 result tells you the facility that ma= de this compound maintained controlled, clean manufacturing conditions. I= t=E2=80=99s a look backward =E2=80=94 at the production environment, not = what=E2=80=99s in the vial right now.

The Present Test =E2=80=94 HPLC-= MS (Purity & Identity)

In plain English: =E2=80=9CIs this exactly wha= t it=E2=80=99s supposed to be, and how pure is it right now=3F=E2=80=9D

High-performance liquid chromatography-mass spectromet= ry (HPLC-MS) is the gold standard identity and purity test. It confirms t= he compound=E2=80=99s molecular weight, composition, and sequence, and qu= antifies exactly how much of the actual compound is present versus impuri= ties or degradation products.

This is the test that tells you what=E2=80=99s in the = vial today. A compound can come from a clean facility (pass USP 85) and s= till be mislabeled, misdosed, or degraded. HPLC-MS catches all of that. I= t=E2=80=99s the most critical test on a COA, and it=E2=80=99s the one you= should always look for first.

The =46uture Test =E2=80=94 USP = 61 (Microbial Enumeration)

In plain English: =E2=80=9CIs anything in here= that could grow or cause problems over time=3F=E2=80=9D

USP 61 tests for the presence and count of live microb= ial contamination =E2=80=94 bacteria, yeast, and mold =E2=80=94 that coul= d proliferate over time. Where USP 85 looks at manufacturing byproducts, = USP 61 looks at living organisms that could be introduced during filling,= storage, or handling.

This is the forward-looking test. A product can be cle= an at the time of manufacture and still pick up contamination later. USP = 61 is the standard microbial quality test used broadly across non-sterile= pharmaceutical products and is what most research vendors use.

The Sterility Test =E2=80=94 USP= 71

In plain English: =E2=80=9CCan we confirm ther= e are absolutely zero viable microorganisms present=3F=E2=80=9D<= /p>

USP 71 is the sterility test =E2=80=94 it goes a step = further than USP 61 by attempting to confirm the complete absence of viab= le microorganisms. This is the standard applied to products intended for = injectable research and is used for injectable research compounds, biolog= ics, and sterile preparations.

The methodology involves incubating samples in growth = media over 14 days to detect even a single colony-forming unit. If someth= ing grows, the batch fails. It=E2=80=99s a more rigorous standard, which = is exactly why it carries different regulatory implications =E2=80=94 and= why you don=E2=80=99t see it universally across research vendors.

Quick Reference

  • USP 85 =E2=80=94 Past =E2=86=92 Was manufacturing clean= =3F

  • HPLC-MS =E2=80=94 Present =E2=86=92 Is it correct and p= ure right now=3F

  • USP 61 =E2=80=94 =46uture =E2=86=92 Will anything grow = over time=3F

  • USP 71 =E2=80=94 =46uture+ =E2=86=92 Confirmed sterilit= y (injectable research standard)

Why Some Companies Opt for USP 6= 1 Instead of USP 71 =E2=80=94 Something to Keep in Mind

USP 61 and USP 71 are often treated as interchangeable= in the research space =E2=80=94 and from a pure microbiology standpoint,= they=E2=80=99re measuring similar things. Both look for live microbial c= ontamination. But there=E2=80=99s a reason some companies deliberately ch= oose USP 61 over USP 71, and it has nothing to do with cutting corners.

USP 71 is the sterility standard for injectable resear= ch. Performing USP 71 testing signals =E2=80=94 or can be interpreted as = signaling =E2=80=94 that a product is intended for injectable research. I= n a space where everything is labeled research use only, not for human co= nsumption, that distinction carries real legal weight. I=E2=80=99ve spoke= n directly with research companies whose legal teams have explicitly proh= ibited them from conducting USP 71 testing for exactly this reason =E2=80= =94 not because the test itself is problematic, but because it can be use= d to imply an injectable research classification that exposes the busines= s to regulatory risk.

It=E2=80=99s a fine line, and the research space is st= ill very undefined. Every company is going to have a different risk toler= ance and operate accordingly. Some will opt for USP 71 and accept that tr= adeoff. Others will stick with USP 61 on the advice of legal counsel. Nei= ther position is inherently wrong =E2=80=94 it=E2=80=99s a business decis= ion made in a space where the rules aren=E2=80=99t fully written yet.

=

What=E2=80=99s worth knowing: the cost difference betw= een the two tests is essentially zero. So when you see USP 61 on a COA, i= t=E2=80=99s not a budget decision. It=E2=80=99s likely a legal one.

Keep this in the back of your mind when evaluating COA= s. The presence of any microbial testing is a positive signal =E2=80=94 a= nd the gap between a vendor that does microbial testing and one that does= n=E2=80=99t is far more meaningful than whether they chose 61 or 71.

Next time you pull up a COA, run through the three win= dows mentally. USP 85 =E2=80=94 was it made cleanly=3F HPLC-MS =E2=80=94 = is it what it says it is right now=3F USP 61 or 71 =E2=80=94 is anything = alive in there=3F When a vendor hits all three, that=E2=80=99s a genuinel= y comprehensive quality picture. Whether they chose 61 or 71 often comes = down to how they approach the legal side of things =E2=80=94 both signal = that they care about sterility and bacterial growth. When a vendor is mis= sing one of the three windows entirely, you now know exactly what questio= n isn=E2=80=99t being answered.

Upg= rade to paid

You're= currently a free subscriber to Peptide Price. =46or the full experience, upgrade your subscription.

Upgrade to paid

&=23160;=
3D=22=22Share
&=23160;=
&=23160;=
3D=22=22=Like
3D=Comment
3D=22=22Restack
&=23160;=

=C2=A9 2026 Derek Pruski
548 Market Street PMB 72296, San =46rancisco, CA 94104
Unsubscribe

3D=22Start
3D=22=223D=22=22
--69c56ce1_389bcc47_751d--