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[69.67.186.9]) by mx.google.com with ESMTPS id af79cd13be357-906b5c49a28si1729870085a.309.2026.05.12.15.06.45 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 15:06:45 -0700 (PDT) Received-SPF: pass (google.com: domain of bounces+tjphuhs=gmail.com@bh.mail.beehiiv.com designates 69.67.186.9 as permitted sender) client-ip=69.67.186.9; Authentication-Results: mx.google.com; dkim=pass header.i=@bhmta.beehiiv.com header.s=bh header.b=wNa0vObP; dkim=pass header.i=@mail.beehiiv.com header.s=bh header.b=uDoAjnG+; spf=pass (google.com: domain of bounces+tjphuhs=gmail.com@bh.mail.beehiiv.com designates 69.67.186.9 as permitted sender) smtp.mailfrom="bounces+tjphuhs=gmail.com@bh.mail.beehiiv.com"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=beehiiv.com X-BmtaRef: eyJfQF8iOiJcXF8vIiwicmVjaXBpZW50IjoidGpwaHVoc0BnbWFpbC5jb20iLCJ4X2xpc3RfaWQiOiJmZDQxNjMwZS1lOTFmLTQ2ZDktYTI3NC1iNzQwZGFiNzU2ZDIiLCJ4X3N1YnNjcmliZXJfaWQiOiI5YzQwZDYzOS02ZTFkLTQyOTItYTlkNy0wZTRjYmJiNWQ1ZGIifQ== DKIM-Signature: v=1; a=rsa-sha256; d=bhmta.beehiiv.com; s=bh; c=relaxed/relaxed; bh=/fN/YC8TeM9709wFNDxoVZZib0KAmtiER2Qw5QfmWSs=; h=from:subject:mime-version:content-type:content-transfer-encoding: list-unsubcribe:feedback-id:list-unsubscribe-post:reply-to:to:cc: content-type:feedback-id:from:subject:to; t=1778623447; b=wNa0vObPkIqRe6xrqHweQmwN+mMTsgdViUjg+f/kYuU4UJLmBbK5RLl+ngVg39/5aMUC5vI4O xk4MffqXRmAmnoaPclgePjKjcuIZ9shhKqaFKYQr4qTGDQruJgO844WYmCdRKXHCau5w6Njolll 95vGkFqb8rOdS754svSIjJvxYMQPSY/5WoN8LKmdY6dvFD2IWRPyBstDV3mpsqQs4lim54qK9Ee IfCnAYYpYqbT8Wpch5KCCwPoFqfsc2Uw0+Hk4qszNTow537NC1DG8yz/2JfhQTMPs5dxpTLtROV Dp04s24oihfolelVn22GofgmELWs/WxdivzvG6YB8TZA==; DKIM-Signature: v=1; a=rsa-sha256; d=mail.beehiiv.com; s=bh; c=relaxed/relaxed; bh=/fN/YC8TeM9709wFNDxoVZZib0KAmtiER2Qw5QfmWSs=; h=from:subject:mime-version:content-type:content-transfer-encoding: list-unsubcribe:feedback-id:list-unsubscribe-post:reply-to:to:cc: content-type:feedback-id:from:subject:to; t=1778623447; b=uDoAjnG+i1wK9kb9RImWHsTp9jKEmE+XJAQOqX7vfX8jOF1LNRMGNV7rmI2+u5g4SBYlEi9AH G89w1gV8A8Fhw8IIjiIrlt3/SYsm/264qv3Qu2PiT6m3pUDFw8RH6rpncATFh5HYmvSMUvvbV7t xstQ92wlBsi71nORqmOXS/bUXBE/+xfkguIcIw8z5KRZ64YhWFxNQm35i/LnFQj9xie0RnDP5Ig ZXeEM57tn4LXCwdj5YUBx7jv4vuJKV92eH3g7PX+yAaNkvYdi55mLefrIL6mxrdpwY+3+ixaYTN +ISY2MrtLziy9iCY2AvowTy7miPII6tj+oezVSig5YGw==; Received: from mail.beehiiv.com by bhmta(mta29) with HTTP id <7f04c26c4e4e11f18c060affcd5dd1a5> for ; Tue, 12 May 2026 22:04:07 +0000 Content-Type: multipart/alternative; boundary="846KJ49XSriv6QZK+Wk7oQ" To: "tjphuhs@gmail.com" Feedback-ID: 11f78dbc-d443-477f-84e8-8c002f1189da:newsletter:fd41630e-e91f-46d9-a274-b740dab756d2:c8f61fda6a60803 From: Hunter Williams List-Unsubscribe: , List-Unsubscribe-Post: List-Unsubscribe=One-Click Reply-To: =?utf-8?Q?Hunter=27s_Health_Hacks?= Subject: PE-22-28 for Depression X-Batch-Id: 272e39aa-e47a-4f29-88c6-5e543876d772 X-Subscriber-ID: 9c40d639-6e1d-4292-a9d7-0e4cbbb5d5db X-Subscription-ID: 663283104 sId: fd41630e-e91f-46d9-a274-b740dab756d2 x-beehiiv-ids: {"account_name":"https://huntershealthhacks.beehiiv.com/","campaign_id":"11f78dbc-d443-477f-84e8-8c002f1189da","category":"newsletter","email_generated_at":1778623445,"user_id":"fd41630e-e91f-46d9-a274-b740dab756d2"} x-beehiiv-type: newsletter x-list-id: fd41630e-e91f-46d9-a274-b740dab756d2 x-list-owner: x-newsletter: https://huntershealthhacks.beehiiv.com/p/pe-22-28-for-depression x-newsletter-id: https://huntershealthhacks.beehiiv.com/ x-newsletter-signup: https://huntershealthhacks.beehiiv.com/subscribe Mime-Version: 1.0 Date: Tue, 12 May 2026 22:04:07 +0000 Message-ID: <20260512.220407.4cfac54d@mta29> --846KJ49XSriv6QZK+Wk7oQ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Happy Tuesday!=0A=0AIn today=E2=80=99s new podcast, I sat down to cover one= of the market's underrated peptides, **PE-22-28**.=0A=0AIf you struggle wi= th depression, anxiety, or just want a peptide that lifts mood without the = SSRI baggage, this one is worth a listen.=0A=0AYoutube: This Peptide Works = 10X Faster Than SSRIs (Here's How) (https://youtu.be/4FZ_bKCeUro)=0A=0AWatc= h on YouTube: [https://youtu.be/4FZ_bKCeUro](https://youtu.be/4FZ_bKCeUro)= =0A=0AListen on Spotify: [https://open.spotify.com/episode/4YT4BG5fI4VAAXtf= pYAWTH?si=3DJZpGFWi0TPiDL5ThAqvgIQ](https://open.spotify.com/episode/4YT4BG= 5fI4VAAXtfpYAWTH?si=3DJZpGFWi0TPiDL5ThAqvgIQ)=0A=0AHere's the breakdown.=0A= =0A=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=0A=0A**What is PE-22-28 **=0A=0APE-22-28 is also call= ed mini-spadin. It's a synthetic 7-amino-acid peptide derived from sortilin= 's propeptide.=0A=0AThe original compound was spadin. The problem was spadi= n degraded too fast in the body to be useful. Researchers shortened and opt= imized it, resulting in PE-22-28. The new version has 300 to 500 times the = potency of regular spadin and stays active in the body for about 23 hours i= nstead of 7.=0A=0AMechanistically, PE-22-28 is a selective **TREK-1 potassi= um channel antagonist**.=0A=0AEssentially, TREK-1 channels regulate the res= ting membrane potential of your neurons. =0A=0AWhen PE-22-28 blocks them, p= otassium efflux drops, neurons depolarize more easily, and synaptic transmi= ssion gets enhanced. =0A=0AYour brain cells fire and wire together more eff= iciently.=0A=0AThat's the surface-level effect. The deeper effect is what m= akes this peptide interesting.=0A=0APE-22-28 rapidly increases **BDNF** (br= ain-derived neurotrophic factor) at both the mRNA and protein levels within= hours. BDNF drives neurogenesis, synaptic plasticity, and neuronal surviva= l.=0A=0AIt also bumps PSD-95 and synapsin expression. That means more synap= tic density and better neural connectivity.=0A=0APlus, it activates MAP kin= ase and PI3 kinase pathways, which protect against cellular stress and tamp= down neuroinflammation. =0A=0AA lot of depression is downstream of chronic= neuroinflammation. PE-22-28 hits that pathway directly.=0A=0A=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=0A=0A**Clinical Results**=0A=0AHere's where it gets fun.=0A=0ATradit= ional SSRIs take 3 to 4 weeks to kick in. PE-22-28 shows antidepressant eff= ects in **4 days**.=0A=0AIn forced swimming and learned helplessness models= , mice on PE-22-28 showed significant reductions in depression-like behavio= rs and immobility time. In corticosterone-induced depression models at 3 mc= g/kg, both acute and subchronic protocols showed improvements within four d= ays.=0A=0AMarkers of new neuron formation roughly doubled in treatment grou= ps. The effects on neurogenesis were most prominent with the G/A-PE 22-28 a= nalog.=0A=0AOn selectivity, PE-22-28 has no significant effects on TREK-2, = TRAAK, TRESK, or TASK-1 channels. No effect on hERG cardiac channels either= . That means no heart rate, blood pressure, or cardiac rhythm issues.=0A=0A= **Important caveat.** All of this is preclinical. There are no human trials= yet. My experience is anecdotal, and the wider human use data is basically= nonexistent.=0A=0A=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=0A=0A**Benefits**=0A=0AWhat does th= is actually do for you in practice?=0A=0A* Rapid-onset antidepressant effec= ts within 4 to 5 days=0A=0A* BDNF upregulation (better learning, memory, ne= ural connectivity)=0A=0A* Enhanced neurogenesis in the hippocampus=0A=0A* I= mproved synaptic plasticity=0A=0A* Better stress resilience and lower corti= sol=0A=0A* Neuroprotective at low doses=0A=0A* No sleepiness, no withdrawal= , no dependency=0A=0A* May actually increase resistance to seizures=0A=0A* = Cardiac-safe based on the selectivity data=0A=0AThe stress resilience piece= is underrated. =0A=0ATwo people can experience the exact same stressor and= one breaks while the other handles it fine. =0A=0AThe difference often lie= s in the brain's ability to adapt. PE-22-28 seems to help with that adaptat= ion.=0A=0A=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=E2=80=94=0A=0A**Dosage**=0A=0AAgain, no human data. T= his is what I've used personally and what felt right.=0A=0A**Starting dose:= 250 mcg subq, once daily in the morning.**=0A=0AI prefer the morning to al= ign with circadian rhythms. It's slightly stimulating, so taking it at nigh= t could mess with sleep.=0A=0A**Cycling: 4 to 5 days on, 2 to 3 days off.**= =0A=0AThe effects seemed cumulative, but the on/off cycle helps prevent tol= erance and antibody buildup. Every peptide eventually runs into that issue.= Cycling extends the runway.=0A=0AIf 250 mcg doesn't work for you after a f= ew days, you can increase to 500 mcg per day. I wouldn't go higher than tha= t. There's no real precedent for it, and the safety data above that range i= s nonexistent.=0A=0AReconstitute with bac water. Keep it in the fridge. Sta= ndard peptide handling.=0A=0AIf you wanted to do this as a nasal spray inst= ead of subq, you can. I haven't personally, but the molecule supports it.= =0A=0A=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=0A=0A**Final Thoughts**=0A=0AI'm a fan of this one= .=0A=0AMost peptides in the cognitive space are nootropics first. PE-22-28 = is different. It's an antidepressant first, with some nootropic benefit on = top.=0A=0ADepression is multifaceted. You can have perfect bloodwork and st= ill be depressed. =0A=0AYou can have a perfect lifestyle and still struggle= . =0A=0AMost of the time, it's a combination of hormones, inflammation, lif= estyle, stress, and circumstance.=0A=0APE-22-28 alone won't fix any of that= . =0A=0ABut it can do something an SSRI struggles to do, which is help some= one get out of the hole fast enough to start fixing the other stuff. Exerci= se, sunlight, sleep, social connection. The compounding lifestyle pieces.= =0A=0AIf you've got someone who can't get off the couch, the SSRI route loc= ks them in for months with side effects and withdrawal at the end. =0A=0APE= -22-28 lifts the floor in 4 days with no dependency on the other end.=0A=0A= That alone makes it worth knowing about.=0A=0ABest,=0A=0AHunter Williams=0A= =0AP.S. You can get PE-22-28 from [Parabolic Peptides ](https://parabolicpe= ptides.com/shop/ols/products/pe-22-28-10mg)(code Taylorw) or [Soma Chems](h= ttps://somachems.com/product/pe-22-28) (code Hunter20). =0A=0A=E2=80=94=E2= =80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80= =94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94= =E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2=80=94=E2= =80=94=0A=0A**Further Reading**=0A=0A* [https://pubmed.ncbi.nlm.nih.gov/289= 55242/](https://pubmed.ncbi.nlm.nih.gov/28955242/)=0A=0A* [https://pubmed.n= cbi.nlm.nih.gov/20405001/](https://pubmed.ncbi.nlm.nih.gov/20405001/)=0A=0A= * [https://pubmed.ncbi.nlm.nih.gov/21807005/](https://pubmed.ncbi.nlm.nih.g= ov/21807005/) =0A=0A* [https://www.frontiersin.org/journals/pharmacology/ar= ticles/10.3389/fphar.2018.01541/ful](https://www.frontiersin.org/journals/p= harmacology/articles/10.3389/fphar.2018.01541/full)=0A=0A=0A=E2=80=94=E2=80= =94=E2=80=94=0A=0AYou are reading a plain text version of this post. For th= e best experience, copy and paste this link in your browser to view the pos= t online:=0Ahttps://huntershealthhacks.beehiiv.com/p/pe-22-28-for-depression --846KJ49XSriv6QZK+Wk7oQ Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable PE-22-28 for Depression