Weight & appetite
Body-weight change, food intake and appetite signaling.
Start with a question.
Follow the evidence.
Have a health concern in mind, or a goal like better sleep or easier recovery? Start here to find peptides discussed in the community and explored in research. Pick a topic, preview its compounds, and open a guide to learn what people report and what studies have found.
Community experiences and study findings are kept separate, so you can see what each source supports.
19 research topics
Metabolism
Blood glucose
Glucose regulation and type 2 diabetes research.
Visceral abdominal fat
Research on the fat surrounding internal organs.
Liver fat
A closer look at retatrutide’s liver-fat substudy.
Recovery
Tendon & ligament recovery
Repair signaling, movement and soft-tissue research.
Joint comfort & movement
Small clinic reports and the questions they leave open.
Wound & skin repair
Topical wound research and experimental repair pathways.
Skin & hair
Skin texture & collagen
Copper-peptide research on connective tissue and facial skin.
Hair density
A popular GHK-Cu question with limited evidence in this library.
Mind & sleep
Sleep quality
A small historical human sleep experiment with DSIP.
Stress & cognitive signaling
Mechanistic research behind Selank and Semax interest.
Hormones
Growth-hormone signaling
GH release, IGF-1 responses and endocrine experiments.
IGF signaling
Experimental comparisons of modified IGF-I molecules.
Reproductive hormones
Controlled human kisspeptin-10 physiology research.
Sexual desire
Bremelanotide’s evidence in a defined clinical population.
Obstetric care
Oxytocin’s prescription role in uterine contractions.
Cellular health
Immune signaling
Disease-specific clinical studies and experimental host defense.
Mitochondria & cellular energy
Cellular metabolism, stress signaling and a specific approved indication.
Aging biology
Telomeres, cellular senescence and NAD-related research.