By condition
Have a specific condition?
Straight answers on whether any peptides genuinely help — and, just as often, an honest “no, here's what actually treats it.” Always talk to your doctor.
Anxiety
No peptide is a proven treatment for anxiety. The one worth knowing about is Selank, which has a real but thin human track record from small Russian trials, and it has never been tested to the standard we would need to call it proven or safe here. Everything else is either early lab work, animal data, or borrowed from research on other problems. None of it should take the place of care that actually works.
Some options worth a lookCeliac disease
Let's be straight with you: no peptide is a proven treatment for celiac disease. Celiac is an autoimmune reaction to gluten that damages the lining of your small intestine, and nothing sold as a peptide fixes that. A few peptides in our library calm gut inflammation or help gut tissue heal in animals, but none has ever been tested in a person with celiac disease. Anyone selling you a peptide as a way to eat gluten safely is not telling you the truth.
Nothing proven yetChronic fatigue
Here is the honest answer: no peptide is a proven treatment for chronic fatigue (ME/CFS). A few compounds in our library target the mitochondria and metabolism, which is a reasonable-sounding idea because low energy is the hallmark of this illness. But none of them has been tested in people with chronic fatigue in a real trial, and the one mitochondrial peptide that was tested for fatigue in a related disease failed to beat placebo. If someone promises you a peptide that fixes ME/CFS, they are selling hope, not evidence.
Nothing proven yetConcussion & TBI
Let's be straight with you: no peptide is a proven treatment for concussion or traumatic brain injury. The honest state of things is that most brains recover from a concussion on their own with time and the right kind of rest, and there is no shot or nasal spray you can take to speed that up in a way that's been proven in solid human trials. One compound in our library, Cerebrolysin, has actually been tested in TBI patients and is used for this in some countries, but even its evidence is mixed and it is not approved in the US. Everything else here is either studied only for stroke, or only in animals, or not really studied for brain injury at all.
Some options worth a lookDepression
No peptide is a proven treatment for depression. A few in our library touch the brain systems tied to mood, and one was literally designed to be a fast antidepressant, but the honest picture is thin: the human evidence is either for a different problem (like anxiety or stroke recovery), or it stops at mice. None of these has been shown to lift depression in a real clinical trial. If you are hurting right now, the things that actually work are within reach, and they are not peptides.
Nothing proven yetErectile dysfunction
Here's the honest picture: the treatments that work best for ED aren't peptides at all - they're pills like Viagra and Cialis. That said, ED is one of the few areas where something in our library is genuinely proven: alprostadil, a prescription injection or suppository doctors use when pills don't work. A second one, PT-141 (bremelanotide), has real human data in men but was never approved for them. Everything else here either works only indirectly or hasn't been proven at all.
Some options worth a lookFibromyalgia
Let's be straight with you: no peptide is a proven treatment for fibromyalgia. A few in our library have a loose, mechanism-based tie to it, and one (oxytocin nasal spray) was actually tested in fibromyalgia and did not relieve pain. If you came here hoping a peptide is the answer you've been missing, we don't want to sell you false hope. The real gains for fibromyalgia come from a different place, and we'd rather point you there.
Nothing proven yetHair loss
No peptide on this site is a proven treatment for hair loss. The copper peptides here, AHK-Cu and GHK-Cu, are the only ones with a real tie to hair, and their evidence is thin: mostly lab dishes and mice, with a few small human studies that always mixed the peptide with other ingredients. They may end up being useful add-ons someday, but nothing here is proven, and none of it should replace treatments that actually regrow hair. The good news is that real, effective treatment for the most common kind of hair loss already exists and is easy to get.
Nothing proven yetIBD (Crohn's & colitis)
Let's be straight with you: no peptide sold online is a proven treatment for Crohn's disease or ulcerative colitis. A few compounds calm gut inflammation in mice, and that research is genuinely interesting, but "works in mice" is a long way from "safe and effective in a person with IBD." None of these has ever completed a real human trial for your condition, so nothing here should be treated as a therapy, and nothing here should take the place of care that actually controls this disease.
Nothing proven yetInsomnia
No peptide is a proven treatment for insomnia. A few compounds touch the sleep system, and melatonin has genuine (if modest) backing for sleep timing, but nothing here is a reliable fix for chronic sleeplessness. The one peptide actually tested in insomnia patients, DSIP, gave weak and mixed results decades ago and was never developed further. If you are lying awake night after night, the real answers are not in a vial from a research-chemical website.
Some options worth a lookLow libido (HSDD)
This is one of the rare cases where the answer isn't simply "no." One peptide here, PT-141 (bremelanotide, sold as Vyleesi), is actually FDA-approved for hypoactive sexual desire disorder in premenopausal women, with two large trials behind it. But be honest with yourself about what that means: independent statisticians who re-checked those same trials found the real-world benefit is modest, nausea is common, and it's an as-needed shot before sex, not a daily fix or a cure. Every other peptide people mention for desire is either the crude, unregulated cousin of that drug or still stuck in animal and early-stage research.
Some options worth a lookMenopause
No peptide is a proven treatment for menopause. There is nothing here that will reliably fix hot flashes, night sweats, mood swings, or the other core symptoms, and any clinic selling you "peptide therapy for menopause" is getting ahead of the evidence. The one honest exception is downstream: a couple of injectable bone-building peptides are genuinely proven for the severe osteoporosis that can follow menopause, but that treats a complication, not menopause itself.
Some options worth a lookMuscle loss (sarcopenia)
No peptide is a proven treatment for sarcopenia. Nothing here can rebuild the muscle you have lost, and no regulator has approved any peptide for age-related muscle loss. A few compounds touch the right biology, and one or two have even been tested in older adults, but the story is always the same: they can nudge the numbers on a body scan without reliably making you stronger, steadier, or more independent. That last part, real strength and function, is what actually matters, and it is exactly what these drugs have failed to deliver.
Nothing proven yetNerve pain (neuropathy)
Let's be honest with you: no peptide is a proven, approved treatment for nerve pain. There is one real bright spot worth knowing about, ARA-290 (cibinetide), which in small human trials eased nerve pain and even helped tiny nerve fibers grow back in people with sarcoidosis and diabetes. That is genuinely promising, but every trial was small and short, it was run mostly by the people who invented it, and no regulator has approved it anywhere. Everything else here is animal work or borrowed from other conditions. None of it should replace care that actually works.
Some options worth a lookObesity
This is the rare case where the honest answer is yes. Several of the most effective obesity treatments ever made are peptides, and a few of them are FDA-approved and sitting in this library. The GLP-1 medicines you've heard about - semaglutide (Wegovy) and tirzepatide (Zepbound) - are peptide drugs, and large human trials show real, lasting weight loss of roughly 15% to 20% of body weight. The catch: the ones that work are prescription medicines that need a doctor, not the 'research chemical' fat-loss peptides sold online, most of which have never been proven to do anything in a person.
Some options worth a lookOsteoarthritis
Let's be straight: no peptide is a proven treatment for osteoarthritis. Nothing here will regrow the cartilage you've lost or reverse the disease. The closest thing in our library with real human backing is hyaluronic acid, an approved knee injection that can dull pain for a couple of months, but even that benefit is modest and short-lived, and doctors still debate how much it really helps. Everything else people inject for arthritic joints rests on animal studies or tiny, uncontrolled clinics.
Some options worth a lookOsteoporosis
This is one of the few conditions where the honest answer is yes: two peptide-based medicines really do treat osteoporosis, and they are both in our library. Teriparatide (Forteo) and abaloparatide (Tymlos) are FDA-approved daily injections that actually build new bone and cut fracture risk, proven in large trials and years of real-world use. But they are prescription drugs for people at high fracture risk, not something you buy online or self-dose. Almost every other bone peptide you will see marketed is either animal-only research or has no real evidence in osteoporosis.
Some options worth a lookSlow-healing wounds
Here is the honest truth: no peptide you can buy is a proven, approved treatment for a slow-healing wound. This is one area where the science is genuinely interesting, because several peptides help wounds close faster in animals, and one natural peptide (thymosin beta-4) actually sped up healing in early human trials for pressure sores and leg ulcers. But those trials used the pure natural protein, not the gray-market vials sold online, and none of these has ever been approved for wound care. A wound that will not heal is a warning sign that something underneath needs fixing, and a peptide does not fix that underlying problem.
Some options worth a lookTendon & ligament injuries
Let's be straight: no peptide is a proven treatment for tendon or ligament injuries. This is the single most hyped use for peptides online, and the reason is easy to see in animal studies, where compounds like BPC-157 clearly speed up tendon and ligament healing in rats. But that's rats, not people. The human evidence is almost nonexistent, the products sold online are unregulated and sometimes don't even contain what the label says, and nothing here has passed a real controlled trial for an injured tendon or ligament in a human being.
Nothing proven yetType 2 diabetes
This is the rare case where the honest answer is yes. Type 2 diabetes is one of the very few conditions with peptides that are truly proven to help, and several of them are in this library. The catch: they are real prescription medicines with real risks, not research chemicals to buy online and dose yourself. What works is the FDA-approved GLP-1 family (like semaglutide, tirzepatide, liraglutide, dulaglutide, and exenatide), prescribed and monitored by a doctor as part of a full treatment plan.
Some options worth a lookThese guides summarize published research for education only. They are not medical advice and never a reason to delay proper care.