I'm 40, male, with a longstanding history of depression and anxiety. Pharmaceutical treatment was not effective for me... including a game changer (for me at least): PE-22-28.
I am postpartum, if that helps or makes any difference. I wish I knew about this peptide after my previous 2 pregnancies. It’s kept my mood SO much more stable.
Glowing300-600 mcg, irregular (up to 1 mg on some days) · Nasal
postpartum, history of postpartum depression; also uses Selank
No human data, and it blocks a channel whose loss makes animals more prone to seizures and ischaemic injury.
Users report
Some describe life-changing lift from depression, postpartum mood or anhedonia within days; others feel worse or irritable with restless sleep at higher doses. Roughly 15-25% of reporters feel nothing and a similar share feel worse: low mood, irritability or rage, overstimulation, and single reports of racing heart with nausea and of visual snow worsening for months.
Best effects
Mood lift within days · motivation (getting to the gym) · fewer meltdowns/triggers
Downsides
Irritability and restless sleep at higher dose · worse mood in some · anger when stacked with P21
Watch
No human data · TREK-1 knockout mice are more vulnerable to ischaemia and seizures; chronic channel blockade could in theory lower neuroprotection or seizure threshold (spadin studies in rodents reported no such effects)
Evidence
Animal only
Typical use
100-300 mcg/day nasal or subq (community).
Getting it
Sold by research-peptide vendors as vials and ready-mixed nasal sprays; one user gets it pre-mixed through a physician. Often out of stock.
Stacked with
Selank: Common pairing, sometimes in one nasal spray; users credit Selank with the calming and PE-22-28 with the mood lift. · Antidepressants, especially MAOIs: Used to taper off or augment them; one phenelzine user described near-serotonin-syndrome symptoms at 800 mcg, settling at 600 mcg. · P21: One user who took both became uncharacteristically angry. · CJC-1295/ipamorelin: Paired by the best-known positive reporter for sleep.
I'm 40, male, with a longstanding history of depression and anxiety. Pharmaceutical treatment was not effective for me... including a game changer (for me at least): PE-22-28.
I am postpartum, if that helps or makes any difference. I wish I knew about this peptide after my previous 2 pregnancies. It’s kept my mood SO much more stable.
Glowing300-600 mcg, irregular (up to 1 mg on some days) · Nasal
postpartum, history of postpartum depression; also uses Selank
Im at week 5 and it has been incredible for me. Im Audhd & hv cPTSD, my triggers and meltdowns have reduced immensely. I have been able to function like a human bean and socialize.
i have been on for 3 months now, and it’s been honestly incredible. i have always been a moody person but also had anhedonia from Reta, and this has helped all of it. I have a consistently good and motivated mood!
It made me waaaaay less miserable. I would hate going to work or hate doing generally anything, then once I started taking it I just started to feel better.
Positiveabout 160 mcg/day, combined with Selank in one spray · Nasal · July to end of September, 5 days a week
Yes I’ve had success with it I used it as a nasal spray and cycled it a month … several months ago I’m just starting a new cycle this week Please note I didn’t stop taking my medications
PE 22 28 keeps me in a more chilled out state of mind. Definitely subtle but without a doubt noticeable. My wife has noticed several times that things that typically would piss me off, I take in stride.
I’ve found its effects mild or moderate at best. You definitely see a positive behavioural change at day 4 but past that it’s hard to tell. I feel it helps with that hopelessness type of feeling in me when times get tough.
I cut my benzodiazepines more than 90%. I started feeling that since day one muscle relaxation, less rumination living present. That's not miracle but still worth and better than benzos.
After a week I moved to 800 mcg at this does there was a very noticeable boost in serotonin bordering on very mild serotonin syndrome. There was no temperature increase or headache just some difficulty concentrating and mild nausea.
One thing I noticed, it definitely can overstimulate you, and it bleeds over into following days. It took a couple of days to a week for it to really feel effect.
Im curious if anyone else has noticed any sort of rebound or worsening after the course. I used this 2 times seperated by months, and now my third. It was working initially but now I am suspecting I have overused bdnf boosters
Mixedthree courses months apart
long history of other BDNF boosters (NSI-189, 7,8-DHF); major stress at the time
I pinned the first few doses and didn’t really see a difference. I mixed some for intranasal admin and am giving it a shot now. We shall see. Not a lot different.
NothingInjection
switched to nasal after subq did nothing; not at a low point
I've tried it twice, both times I've experienced low mood and low energy by day two, the opposite of what is supposed to happen. By day 7 I've given up as I feel so awful, three days later my energy returns and mood lifts.
Each bead is one amino acid in the peptide's chain, coloured by its side chain: grey for non-polar, cyan for polar, blue for positively charged and fuchsia for negatively charged. Length and mix tell related peptides apart at a glance, from a two-residue dipeptide like carnosine to a 43-residue protein like thymosin beta-4. The colours describe chemistry only and predict neither effect nor safety.
non-polarpolarpositivenegative
Report grades
Every first-hand Reddit or X report is graded on its own, from glowing through positive, mixed, nothing and negative to bad reaction, and the bar shows how those grades split. Posts that look vendor-adjacent stay on the peptide's page but are left out of the counts.
GlowingPositiveMixedNothingNegativeBad reaction
% positive
The share of a peptide's graded Reddit and X reports that are glowing or positive, vendor-adjacent posts left out. A peptide with few reports is pulled toward the average of all reports, as if it had eight average ones besides its own, so two glowing posts cannot top the list. Kept peptides rank by the same reports' mean grade, shrunk the same way, and excluded ones follow in that order.
Researcher estimate
No first-hand report of this peptide has been graded yet, so the figure is the researchers' own rating out of 10 from what they read about it. It ranks alongside the computed scores until reports arrive.
Safety tier
Each peptide is tiered clean, caution or excluded from its five risk axes under the chosen safety bar. An excluded peptide has a plausible route to serious harm, so it stays listed with the reason but ranks behind every other entry, however good its reviews.
Safety bar
The safety bar sets how much risk it takes to exclude a peptide. Strict: out on any serious mechanism with little human data, or any documented serious harm. Balanced: out on documented serious harm (unless it is obvious, reversible and from a regulated product), or a serious mechanism whose harm would be silent with no human data at all. Evidence only: out only on documented serious harm in humans that is lasting, delayed or from grey-market product.
Seen harm
Documented serious adverse events in humans, from 0 for none despite real exposure to 3 for deaths or several well-documented serious harms. Serious means a hospital or emergency visit or harm lasting weeks, so a headache or a bad night does not count.
Mechanism
A plausible biological route to serious harm at the doses people use, such as growth-factor signalling, hormone-axis suppression, heart or blood-pressure effects or immune activation. It runs from 0 when none is known to 3 when a dangerous pathway has been shown in living animals.
Data gap
How little human safety data exists for the molecule actually sold, from 0 for an approved drug with large trials and years of use to 3 for no human safety data at all. A modified analogue does not inherit its parent's trials.
Silent harm
Whether the feared harm would show quickly or stay hidden, from 0 when it is obvious and goes on stopping to 3 when it is silent and delayed, like tumour promotion or slow organ damage. User reports cannot reveal a harm that takes years to appear, so a high score here limits what good reviews can tell you.
Product
The risk of what people actually buy, from 0 for a regulated pharmacy or supplement product taken by mouth or on the skin to 3 for a grey-market injectable. In one dataset of 6,441 grey-market samples, 42–71% failed basic quality criteria and 15% carried endotoxin.
Evidence
The strongest kind of study behind the peptide's effects, from an approved drug through human controlled trials and small human studies to animal work or nothing of its own. Animal results often fail to carry over to people.
Access
How people get it: as an approved drug, a compounded prescription, an over-the-counter supplement or from the grey market, where nobody checks the vial. The channel decides both the legal position and the risk of a bad batch.
Price per month
Thirty days of the typical dose, from its low end to its high end, priced at the listing a careful buyer would choose: in stock, from a shop scoring 4 of 5 on trust (third-party tested where no score is set), failing that 3, a pure pack before a blend, a European shop first, then the cheapest per mg. The range is the dose's, not the shops'. A per-dose amount counts once a day unless the dose says otherwise. Prices are in euros at ECB rates of 2026-10-29, before shipping; the shop table keeps each listing's price per mg, per gram for bulk supplements. Where no listing can be priced the researchers' own estimate stands in, and says so.
Dose users report
The middle half of the daily doses stated in at least five first-hand reports, vendor posts left out. Where its middle sits more than twice above or below the declared dose, the month is priced at it as well, since what people take is what they pay for.
Testing
Whether the shop publishes lab results: third-party tested means an independent lab checks each batch, own COA means the shop's own certificate of analysis, and no public tests means neither. A certificate shows purity, not safety.
Added peptide
Some packs sold under one peptide's name hold a second one, such as 5 mg GHK-Cu in a nasal kit, stated only in the description. Sprayed in the nose or injected it reaches the blood like an injection, so it carries the risk of that route and is tiered as the injectable form, whatever its tier on the skin. A pack whose page gives no contents list may hold more than its name.