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BPC-157 VEGF/FGF pathway activation; angiogenesis; epithelial migration 58% faster ulcer closure at 14 days vs control (J Physiol Pharmacol 2019) 10 mcg/kg daily (subcutaneous) Strongest evidence base for gastric ulcer healing. D…
Palmitoyl Pentapeptide-4 (Matrixyl) TGF-β receptor agonist. Stimulates procollagen I synthesis 18% increase in collagen density (12 weeks, ultrasound-verified). Journal of Cosmetic Dermatology 2023 3–8 ppm in serums Gold standard…
The table below compares three research-grade peptides with documented roles in cellular detoxification pathways. Glutathione, BPC-157, and thymosin alpha-1. Against their mechanisms, evidence base, and practical limitations. Red…
Primary Action Modulate neurotransmitter balance (GABA, orexin) and hormone pathways without receptor antagonism Force sleep through GABA-A receptor agonism or orexin receptor blockade Signal circadian phase shift; minimal direct…
GHRP-2 Ghrelin receptor agonist 7–10× baseline 30–50% Low to moderate (cycle after 8–12 weeks) 100mcg 2–3×/day subcutaneous GHRP-6 6–9× baseline 25–45% Moderate (notable appetite increase) Hexarelin 10–12× baseline 40–60% High (r…
Animal studies consistently demonstrate peptides help with telomere lengthening or preservation, but the biological distance between model organisms and humans introduces significant uncertainty. A 2019 study in Bulletin of Exper…
PT-141 (Bremelanotide) Melanocortin-4 receptor agonist in hypothalamus MC4R (paraventricular nucleus) 45–90 minutes subcutaneous FDA-approved (2019) for HSDD in premenopausal women; Phase 3 RCTs FDA-approved as Vyleesi Strongest …
Peptides don't replace proton pump inhibitors (PPIs) or H. pylori eradication protocols. They augment them. PPIs reduce gastric acid secretion, creating an environment where healing can occur. Peptides accelerate the repair proce…
Melanotropin Peptides MC1R activation → endogenous melanin synthesis in basal epidermis 7–14 days (cumulative dosing) 2–4 weeks (melanin degrades as keratinocytes turn over) Moderate (equivalent to 2–3 weeks of gradual UV exposur…
Active Mechanism Direct MC1R receptor binding → cAMP upregulation → tyrosinase activation → eumelanin synthesis No documented MC1R interaction; mechanisms claimed are precursor supply (tyrosine) or non-specific 'cellular support'…
Before the table: This comparison covers the five peptide categories with the strongest mechanistic rationale for longevity intervention. Immune restoration, telomere preservation, mitochondrial efficiency, neurodegeneration prev…
Before comparing efficacy, understand that peptide interventions are adjunctive—they enhance endogenous repair, they don't replace rest, cognitive rehabilitation, or medical monitoring. Cerebrolysin BDNF/NGF receptor activation; …
Peptides help with female sexual health when the underlying issue is neurological rather than hormonal. Bremelanotide and oxytocin are most effective in women with normal estrogen and testosterone levels but diminished desire. A …
Thymosin alpha-1 Immune modulation via T-cell regulation 5 pilot studies (n=142 total); 1 double-blind RCT in adjacent condition 0.8–3.2mg SC 2–3×/week for 12–16 weeks Strongest evidence base; multiple trials show 22–34% fatigue …
BPC-157 VEGF upregulation, angiogenesis, fibroblast activation Increases collagen synthesis, promotes neovascularisation in avascular tissue Rat Achilles tendon: 40% faster healing vs control (Journal of Physiology and Pharmacolo…
Growth Hormone Secretagogues (MK-677, GHRP-2, Hexarelin) Stimulate pituitary GH release → IGF-1 elevation → mitochondrial biogenesis Direct: ATP production, nutrient partitioning, glycogen sparing 4–6 weeks for measurable perform…
Copper Peptide (GHK-Cu) 340 Da VEGF/TGF-β upregulation, MMP activation, follicle remodelling High. Multiple RCTs showing 10–20% density increase at 24 weeks Requires lipophilic carrier; degrades in alkaline pH Gold standard for t…
Bremelanotide (PT-141) MC3R/MC4R agonist in hypothalamus. Increases dopamine signaling in arousal circuits Central desire and motivation FDA-approved; two Phase 3 RCTs showing 0.5–0.9 additional satisfying events/month vs placebo…
| Peptide | Mechanism of Action | Clinical Trial Evidence | Sleep Onset Latency Improvement | Slow-Wave Sleep Duration Increase | Typical Dosing Protocol | Professional Assessment ||—|—|—|—|—|—|| DSIP (Delta Sleep-Inducing Peptid…
Mechanism of Action Stimulates endogenous GH release from anterior pituitary via GHRH and ghrelin receptor agonism Direct delivery of synthetic GH into systemic circulation Peptides preserve pituitary function; HGH bypasses it en…