Anecdotal · community-sourced
What to expect,
week by week.
Not every peptide follows the same clock. GLP-1s hit in days. GHK-Cu shows up in months. MOTS-c is still mostly a mystery. This is the felt-experience map — synthesized from community reports, not clinical trials.
Treat these as a compass, not a prescription. Your body is not the average.
Retatrutide
5 phasesGIP / GLP-1 / glucagon triple agonistA steep on-ramp. Most people feel the drug within days — appetite drops hard, GI side-effects arrive early, and the body slowly adapts over the first month before the smoother 'quiet' phase sets in.
Titrated weekly. Side-effects front-load, benefits compound.Tirzepatide
5 phasesGIP / GLP-1 dual agonistGentler on-ramp than retatrutide but a similar shape. Appetite suppression is strong, GI side-effects front-load, and the sweet spot is often found around 5–7.5 mg before diminishing returns.
Weekly injection, titrated every 4 weeks.Semaglutide
4 phasesGLP-1 receptor agonistThe slowest and gentlest of the GLP-1 family. Effects build over weeks, not days. Patience pays off — people who quit at week 4 for 'not working' usually stopped just before the curve steepens.
Weekly injection, monthly titration.BPC-157
3 phasesGastric pentadecapeptideSubtle and slow. Rarely produces a 'felt' effect. Improvements usually surface as an injury quietly stops hurting, not a sudden shift.
Daily, 4–6 week cycles most common.TB-500
3 phasesActin-sequestering peptideLong half-life means slow, cumulative feel. Often stacked with BPC-157 for injury recovery. The first cycle is where responders self-identify.
Weekly loading dose for 4–6 weeks, then taper.GHK-Cu
4 phasesCopper-binding tripeptideCosmetic and repair effects build over months. Injectable users report systemic feel; topical users see skin and hair changes.
Daily topical or 3–5x/week injectable, minimum 8-week cycle.Ipamorelin
3 phasesGrowth hormone secretagogueThe gentle secretagogue. Pulses growth hormone without the hunger or cortisol spikes of stronger ghrelin mimetics. Effects are felt in sleep quality first, body composition later.
1–3x daily subQ, empty stomach; commonly stacked with CJC-1295.CJC-1295 (DAC)
3 phasesGHRH analogue (long-acting)The long-half-life partner to ipamorelin. Instead of daily pulses it creates a sustained GH 'bleed'. Effects are steadier but blunter than pulsatile stacks.
1–2x weekly injection.MK-677 (Ibutamoren)
3 phasesOral ghrelin mimeticOral, potent, and hunger-forward. Sleep improves fast but so does appetite — many users gain fat if they don't restrain intake.
Daily oral, evening dose most common.Tesamorelin
3 phasesGHRH analogue (stabilised)The visceral-fat specialist. Slower to show than GLP-1s but targets a fat depot they don't touch. Effects are measured in months.
Daily subQ.Sermorelin
3 phasesGHRH analogueThe oldest and gentlest GHRH. Slow, physiologic. Better suited to long-term wellness use than short 'transformation' cycles.
Nightly subQ, minimum 3-month cycle.