Find Your Peptide. A Plain-English Decision Guide

Read this first: This is a research-education guide, not a prescription. Most peptides on this site are not FDA-approved for the goals discussed below. We tell you the truth about what the evidence shows, and where it's thin. If you're thinking about using any of these, talk to a qualified clinician who actually knows peptide pharmacology. "Start low, go slow" is the universal rule.

Jump to Your Goal

🩹 Injury & Tissue Repair ⚖️ Fat Loss 💪 Muscle & Performance 😴 Sleep Quality ✨ Skin & Hair 🧠 Focus & Cognition 🌿 Anxiety & Stress 🫃 Gut Health 🛡️ Immune Support ⏳ Longevity & Anti-Aging ❤️‍🔥 Libido 🦴 Joints & Connective Tissue

🩹 Injury, Tendons & Soft Tissue Repair

If this sounds like you: You've got a nagging tendon issue, a muscle strain that won't heal, post-surgical recovery, joint pain from overuse, or a ligament sprain that's lingering. You've tried rest, PT, and time, you want to know what people in the research/biohacking world reach for.

BPC-157

The most talked-about tissue-repair peptide, period. Derived from a protein found in gastric juice. Preclinical research shows it accelerates healing of tendons, ligaments, muscle, and gut tissue, likely through angiogenesis (new blood vessel formation) and growth factor modulation. The injury community's default pick for tendinopathy.

Evidence: Extensive animal data, only 3 small published human studies. Not FDA-approved. On FDA Category 2 list (Sept 2023).

TB-500 (Thymosin Beta-4 fragment)

Commonly stacked with BPC-157 because they hit repair through different mechanisms. TB-500 is studied for actin regulation, cell migration to injury sites, and anti-inflammatory effects. Often chosen for broader systemic injuries or where multiple tissues are involved.

Evidence: Preclinical + limited human trials (mostly cardiac-focused). Not FDA-approved.

GHK-Cu

Often added when skin/wound healing is part of the picture. Copper peptide with documented effects on collagen synthesis and tissue remodeling. Less about tendon and more about skin, scars, and surface tissue.

Evidence: Decades of research in dermatology and wound care.

🔥 The Popular Stack: WOLVERINE

BPC-157 + TB-500. The most common injury-repair combination in the peptide community. Users report complementary effects (BPC-157 for local tissue, TB-500 for systemic recovery). Read the full breakdown →

Honest note: No published studies have evaluated this specific combination as a blend. The logic is based on each peptide's individual mechanism.

Reality check: Human evidence for BPC-157 is thin. The strongest data is preclinical (animal models). Most of what you hear is anecdotal from athletes and biohackers. That doesn't mean it doesn't work, it means the proof isn't the same as for an FDA-approved drug.

⚖️ Fat Loss & Weight Management

If this sounds like you: You're trying to lose meaningful weight and diet/exercise alone isn't cutting it, or you've hit a stubborn plateau. You want to know what's actually working, not snake oil.

Tirzepatide (Mounjaro / Zepbound)

Currently the most effective FDA-approved weight-loss medication available. Dual GIP/GLP-1 agonist. Average weight loss in clinical trials: ~22% of body weight over 72 weeks at the highest dose. This is the category leader for serious, sustainable fat loss.

Evidence: FDA-approved 2022 (diabetes), 2023 (weight). SURMOUNT trials, robust Phase 3 data.

Semaglutide (Ozempic / Wegovy)

The GLP-1 that kicked off the whole wave. Average weight loss: ~15-17% body weight. More clinical history, better-established safety profile, usually more affordable. A solid choice if tirzepatide isn't accessible.

Evidence: FDA-approved. STEP trials, extensive post-market data.

Retatrutide (investigational)

Triple agonist (GLP-1 + GIP + glucagon). Phase 2 trials showed up to ~24% body weight loss. Not yet approved, expected 2027-2028. This is what's coming, not what you can get now.

Evidence: Phase 3 TRIUMPH trials ongoing. Not FDA-approved.

Tesamorelin (for visceral fat specifically)

FDA-approved specifically for HIV-associated lipodystrophy, but studied off-label for visceral (abdominal) fat. Not for general weight loss, it's narrow: it targets fat around organs rather than overall body fat.

Evidence: FDA-approved for narrow indication. Off-label use for visceral fat has published data.

💭 What about AOD-9604?

AOD-9604 is often marketed as a "fat loss peptide" based on a modified fragment of growth hormone. Honest take: human trials have largely failed to show meaningful weight loss. It's not in the same league as GLP-1s. Read the honest breakdown →

Reality check: GLP-1s work. They also have real side effects (nausea, constipation, GI issues) and require proper clinical oversight. Compounded versions exist in a regulatory gray zone. The non-FDA-approved "fat loss peptides" you see advertised online are mostly hype next to what GLP-1s actually deliver.

💪 Muscle Growth & Athletic Performance

If this sounds like you: You're training seriously and looking for an edge in recovery, lean mass, or performance. You want to know what the research says about growth hormone secretagogues and related peptides.

CJC-1295 + Ipamorelin

The classic GH-release stack. CJC-1295 increases baseline GH levels; Ipamorelin produces a clean GH pulse without significantly spiking cortisol or prolactin (unlike older GHRPs). Studied for recovery, body composition, and sleep quality indirectly.

Evidence: CJC-1295 has published PK data; Ipamorelin has limited human trials. Neither FDA-approved.

Tesamorelin

A GHRH analog with more robust clinical data than most growth-hormone peptides. FDA-approved for lipodystrophy, but the GH-elevating effect is what draws athletic interest.

Evidence: FDA-approved. Strong published PK/PD data.

MOTS-c

Mitochondrial-derived peptide studied for metabolic flexibility, insulin sensitivity, and exercise performance. Animal data suggests it may improve running capacity and glucose handling.

Evidence: Preclinical data is interesting; human data is limited.

Reality check: GH secretagogues don't turn you into a different athlete overnight. The effect is real but modest, better recovery, slightly improved body composition, better sleep. They are banned by WADA and most sports leagues. If you compete, don't touch these.

😴 Sleep Quality & Deep Sleep

If this sounds like you: You sleep enough hours but don't feel rested. Or you wake up at 3am. Or your deep sleep tracks as chronically low on your wearable. You're interested in the GH-sleep connection.

CJC-1295 + Ipamorelin (nighttime dose)

The #1 reason people take this stack, dosed before bed, it tends to deepen slow-wave sleep. GH release peaks during deep sleep, and this stack amplifies that pulse. Users often report more vivid dreams and feeling more rested even at the same sleep duration.

Evidence: GH-sleep link is well established. Specific outcome data on the stack for sleep is mostly anecdotal.

DSIP (Delta Sleep-Inducing Peptide)

The most literally-named sleep peptide, discovered in the 1970s after being isolated from the cerebral venous blood of sleeping rabbits. Studied for its ability to promote slow-wave (delta) sleep, normalize disrupted sleep architecture, and reduce sleep-onset latency. Also investigated for stress resilience, chronic pain disruption of sleep, and opioid/alcohol withdrawal sleep issues.

Evidence: Several small clinical trials from the 1980s-90s (mostly European); modern replication is limited. Not FDA-approved. Short half-life (~7 minutes) makes consistent effects tricky.

Epitalon

A tetrapeptide studied in Russia for melatonin regulation and pineal gland function. Typically run in short cycles (10-20 days). Reported to normalize circadian rhythm in older adults.

Evidence: Russian clinical literature; limited Western peer-reviewed data.

Selank

If anxiety is disrupting your sleep, Selank is studied as an anxiolytic without sedation. Not a sleep peptide per se, but can help the falling-asleep problem if your mind is racing.

Evidence: Russian clinical data. No Western FDA approval.

💭 DSIP vs. CJC/Ipa for sleep

Different mechanisms, different feels. CJC-1295 + Ipamorelin deepens sleep via the GH pulse, users often report vivid dreams and better morning recovery. DSIP targets sleep architecture and delta-wave activity more directly, and is often chosen for fragmented sleep or when the issue is quality, not quantity. Some users cycle or stack them.

✨ Skin Quality, Hair & Aesthetic

If this sounds like you: You're interested in skin repair, wound healing, fine lines, scars, or hair thickness. You've seen peptide serums in skincare and want to know what's real.

GHK-Cu

The gold standard copper peptide. Decades of research. Stimulates collagen, elastin, glycosaminoglycans, and has documented wound-healing effects. Widely used in cosmetic dermatology, both topical and injectable research.

Evidence: Strong, extensive dermatology literature.

BPC-157

Often added for general tissue repair and its reported effects on scarring and wound healing.

Evidence: Preclinical data for skin; mostly animal models.

🔥 The Popular Stack: GLOW

GHK-Cu + BPC-157 + TB-500. The skin/regeneration blend. GHK-Cu drives collagen and skin-level repair; BPC-157 and TB-500 add systemic tissue support. Read the full breakdown →

🔥 The Stronger Stack: KLOW

GLOW + KPV. Adds KPV's anti-inflammatory action via NF-κB inhibition. Chosen when inflammation is part of the skin picture (rosacea-type presentations, irritation-prone skin). Read the full breakdown →

🧠 Focus, Memory & Cognitive Performance

If this sounds like you: You're interested in nootropic-type effects, age-related cognitive concerns, or focus/mental clarity.

Semax

Russian-developed heptapeptide. Studied for BDNF upregulation, neuroprotection, and cognitive enhancement. Commonly used intranasally. Reports of improved focus and mental energy without stimulant-like jitters.

Evidence: Extensive Russian clinical literature; approved there for stroke recovery. Not FDA-approved.

Selank

Often paired with or alternated against Semax. More anxiolytic-leaning; useful when mental performance is hampered by anxiety or stress.

Evidence: Russian clinical data.

Dihexa

Investigational angiotensin IV analog. Preclinical data is striking on synapse formation and cognitive tasks. But, almost no human data. High-interest, high-uncertainty territory.

Evidence: Preclinical only. No human trials published.

🌿 Anxiety, Stress & Mood

If this sounds like you: You experience chronic low-grade anxiety, stress-related sleep issues, or you want an alternative to traditional anxiolytics without sedation.

Selank

The #1 peptide choice for anxiety. Non-sedating anxiolytic. Studied for generalized anxiety, stress, and cognitive function under pressure. Acts on GABA and serotonin systems indirectly.

Evidence: Russian clinical trials. Approved in Russia; not FDA-approved.

Semax

Not primarily an anxiolytic, but the mood-stabilizing and neuroprotective effects help some users feel more level.

Evidence: Russian clinical data.

🫃 Gut Health, IBD & GI Repair

If this sounds like you: You deal with IBD symptoms, leaky gut, chronic GI inflammation, ulcers, or damage from NSAIDs. The gut is often where peptide users start.

BPC-157 (oral)

BPC-157 was literally discovered in gastric juice, this is its home turf. Preclinical data for ulcer healing, IBD, and intestinal repair is the most robust part of its research base. Often taken orally specifically for gut issues.

Evidence: Extensive preclinical data in GI models. Limited human trials.

KPV

Anti-inflammatory tripeptide (fragment of α-MSH). Studied specifically for colitis and IBD through NF-κB inhibition. Often oral/rectal administration for direct gut targeting.

Evidence: Preclinical IBD models show strong anti-inflammatory effects.

🔥 Common Gut Stack

BPC-157 + KPV. Pairs gut-tissue repair with anti-inflammatory action. Common in communities dealing with chronic GI conditions.

🛡️ Immune Support & Chronic Infection Resilience

If this sounds like you: You get sick often, have chronic viral issues, or are looking at immune modulation for autoimmune or post-viral concerns.

Thymosin Alpha-1

The most clinically validated immune-modulating peptide on the site. Approved in 35+ countries (not the US) for immune conditions. Used adjunctively in hepatitis B/C, severe infections, and immune deficiency.

Evidence: Strong international clinical data. Not FDA-approved in the US.

KPV

Anti-inflammatory modulator. Often chosen when the goal is reducing inflammation rather than boosting immune aggression.

Evidence: Preclinical + limited human data.

⏳ Longevity, Anti-Aging & Cellular Health

If this sounds like you: You're interested in the science of aging, telomeres, mitochondrial function, cellular senescence, and where peptides fit into the broader longevity picture.

Epitalon

The headline longevity peptide. Studied for telomerase activation and pineal gland function. Russian clinical data in older adults shows normalization of melatonin rhythm and various biomarkers. Typically run 10-20 days 1-2x per year.

Evidence: Russian clinical literature; limited Western replication.

SS-31 (Elamipretide)

Mitochondrial-targeted peptide. Studied specifically for mitochondrial dysfunction, a root cause in aging. Clinical trials in primary mitochondrial myopathy. This is real investigational pharma, not a gray-market peptide.

Evidence: Phase 3 trials completed; pharma development ongoing.

MOTS-c

Another mitochondrial-derived peptide. Studied for metabolic health, insulin sensitivity, and exercise capacity, all downstream of mitochondrial health.

Evidence: Preclinical + early human data.

NAD+

Not strictly a peptide, but part of the same conversation. NAD+ declines with age, and supplementation is studied for cellular energetics and DNA repair pathways.

Evidence: Growing but mixed data in humans.

❤️‍🔥 Libido & Sexual Function

If this sounds like you: You're dealing with low libido, arousal issues, or HSDD, for either biological or psychological reasons.

PT-141 (Bremelanotide / Vyleesi)

FDA-approved (as Vyleesi) for hypoactive sexual desire disorder in premenopausal women. Works centrally (on brain melanocortin receptors), not on blood flow like PDE5 inhibitors. Studied off-label in men.

Evidence: FDA-approved. Phase 3 clinical data.

Kisspeptin

Works upstream of the hormonal cascade, kisspeptin is the master regulator of GnRH release, which drives LH/FSH and ultimately testosterone and estrogen. Studied in human trials at Imperial College London for low libido, HSDD, and hypothalamic reproductive dysfunction in both men and women. Unlike PT-141 (which hits central arousal pathways), kisspeptin works by restoring the endocrine signal itself. Often the pick when the root issue looks hormonal rather than purely psychological.

Evidence: Multiple published human trials (Imperial College group). Not FDA-approved. Active clinical development.

💭 PT-141 vs. Kisspeptin, which one?

PT-141 is acute and central, take it before the moment, feel a shift in arousal and desire within hours. Kisspeptin is systemic and endocrine, it's about fixing the underlying hormonal signaling over time. Different tools for different problems. Some research groups are exploring whether they can be complementary.

🦴 Joint & Connective Tissue Issues

If this sounds like you: You have osteoarthritis, chronic joint pain, or degenerative joint disease (hip, knee, shoulder). Not acute injury, ongoing wear-and-tear.

BPC-157

Cross-over pick from the injury category. Commonly used in joint contexts for its effects on connective tissue health.

Evidence: Preclinical. Limited human data.

Pentosan Polysulfate (PPS / Elmiron)

FDA-approved for interstitial cystitis but used widely in Australia for osteoarthritis (where it's approved under the brand Cartrophen). Studied for cartilage preservation.

Evidence: FDA-approved for IC. OA approval exists in some countries. Carries a maculopathy warning.

TB-500

Added for systemic tissue support in chronic joint cases.

Evidence: Preclinical.

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Disclaimer: This page is educational content describing how peptides are commonly used and discussed in the research and peptide communities. It is not medical advice and not a recommendation that any peptide is safe or effective for any condition. The majority of peptides discussed are not FDA-approved. Dosing, route, and appropriateness depend on individual factors that only a qualified clinician can evaluate. "Commonly studied" does not mean "proven." Consult a licensed healthcare provider before using any peptide.