Why people use peptides — and what the evidence actually supports
Each case study starts from the goal, not the compound: what people are trying to achieve, which peptides are used for it, what the published research shows, and where the claims outrun the data.
- Metabolic HealthBModerate Human Evidence
Weight Loss and Liver Fat
The most common reason people look at peptides at all: sustained appetite reduction, and what trials report about liver fat alongside it.
RetatrutideTirzepatideSemaglutideRead the case study - Skin & HairDPreclinical Research
Skin, Hair and Wound Healing
The KLOW and GLOW stacks are the most-discussed cosmetic peptide combinations. Here is what each ingredient actually has behind it.
KLOW blendGLOW blendGHK-CuKPVRead the case study - RecoveryDPreclinical Research
Soft-Tissue Injury and Recovery
BPC-157 is the single most searched research peptide. The gap between how confidently it is discussed and what has been published in humans is the story here.
BPC-157TB-500BPC-157 + TB-500 blendRead the case study - Growth HormoneCEarly Human Research
Body Composition and Sleep Quality
Growth-hormone secretagogues are used for the same reason across the board: better sleep first, body composition later.
CJC-1295 + IpamorelinSermorelinTesamorelinRead the case study - LongevityCEarly Human Research
Energy and Mitochondrial Function
Fatigue that sleep does not fix is the entry point. Mitochondrial compounds are the most biologically interesting and least resolved category on this site.
MOTS-cSS-31 (elamipretide)NAD+Read the case study - CognitiveDPreclinical Research
Focus, Mood and Cognitive Load
Two Russian-developed peptides used together for the same reason people pair a stimulant with an anxiolytic: attention without the edge.
SemaxSelankSemax + Selank blendRead the case study - ImmuneCEarly Human Research
Immune Resilience and Inflammation
Frequent infections and chronic inflammatory conditions drive interest here — and this category has more real clinical use behind it than most.
Thymosin alpha-1VIPKPVRead the case study - SleepEExperimental / Limited Evidence
Sleep Onset and Sleep Depth
Delta sleep-inducing peptide has the most promising name and some of the thinnest evidence on this site. That contrast is instructive.
DSIPEpitalonCJC-1295 + IpamorelinRead the case study - Metabolic HealthCEarly Human Research
Visceral Fat and Metabolic Markers
Not weight on a scale, but the fat around the organs — the compartment most strongly tied to metabolic risk.
Tesamorelin5-Amino-1MQAOD-9604Read the case study - Sexual HealthBModerate Human Evidence
Libido and Sexual Function
One of the few categories where the leading compound is FDA approved — and where its close relative is a clear example of what unselective signalling costs.
PT-141 (bremelanotide)Melanotan IIGonadorelinRead the case study - LongevityEExperimental / Limited Evidence
Healthy Ageing and Longevity
The category with the largest gap between ambition and evidence, and the one where the quality of the underlying research matters most.
EpitalonNAD+GlutathioneCartalaxRead the case study
These pages describe reported and studied uses for educational purposes. They are not recommendations, protocols or individualised dosing advice, and reported use patterns are summaries of published literature and community reporting rather than verified clinical cases.