Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Head-to-head comparison of PE-22-28 and Pinealon — mechanism, side effects, legal status, and pricing.
PE-22-28 is a 7-amino-acid synthetic analog of spadin, a peptide fragment (residues 22-28) of the 44-aa propeptide (PE) released during post-translational maturation of sortilin (the neurotensin receptor-3). It is studied in preclinical models as a fast-acting antidepressant that works by selectively blocking the TREK-1 two-pore potassium channel. There is no established use for hair growth — that is a separate compound and the two should not be confused.
PE-22-28
Pinealon
Category
Legal Status
Mechanism
Half-life
Side Effects
COA-verified vendors · trust score ≥70 required · single-vial price — bulk/bundle deals may be lower
PE-22-28
Pinealon
COA corpus from Disclosed Labs — independently tested batches only.
PE-22-28
13
COAs
99.6%
Avg purity
7
Labs
Pinealon
30
COAs
98.7%
Avg purity
9
Labs
Mazella, Borsotto and colleagues at Nice, France identified spadin (Mazella et al., PLoS Biology 2010, PMID 20405001) and subsequently developed shortened PE 22-28 analogs with ~300× improved TREK-1 affinity and longer in vivo half-life (Djillani et al., Front Pharmacol 2017, PMID 28955242). In mouse antidepressant assays (forced swim, tail suspension, novelty-suppressed feeding), acute or 4-day IP dosing at ~3–4 μg/kg produced effects comparable to chronic SSRI treatment; oral gavage at 1 mg/kg was also active. The G/A-PE 22-28 modification extended duration of action to ~21–23 hours. Chronic dosing did not produce cardiac or seizure signals in rodents. No human clinical trials have been conducted. A detailed review of TREK-1 blockers for depression is available in Djillani et al., Pharmacol Ther 2019 (PMID 30291907).
Key references
Khavinson et al. (Rejuvenation Research, 2011, PMID 21978084) reported that Pinealon suppressed reactive oxygen species accumulation, reduced cell death, and modulated cell-cycle progression across multiple cell types under oxidative stress, with the authors suggesting direct genome-level interaction. Arutjunyan et al. (International Journal of Clinical and Experimental Medicine, 2012, PMID 22567179) reported that Pinealon administered to pregnant rats on a methionine (hyperhomocysteinemia) diet improved spatial learning and reduced ROS accumulation in cerebellar neurons of offspring. The evidence base is dominated by Khavinson's St. Petersburg Institute of Bioregulation and Gerontology and has not been independently replicated in Western clinical trials. No Phase II or III trials exist; Pinealon is not FDA-approved.
Key references
PE-22-28 and Pinealon are both in the Cognitive category and may have overlapping mechanisms. Researchers should review both profiles carefully, understand the mechanisms of action, and monitor the relevant biomarkers when combining compounds in the same class. As always, consult a licensed healthcare provider before making any decisions about combining research compounds.
This platform provides informational tools only, not medical advice. This comparison is for educational purposes only. Consult a licensed provider.
Contraindications
Lab Testing
Disclosed Labs