Research Tool
Half-Life & Dosing
Frequency Calculator
Calculate compound clearance times, dosing frequency recommendations, and visualize decay curves for 30+ research peptides. Based on published pharmacokinetic data.
Filter by Category
~4 hours (subcutaneous/IM)
Plasma Decay Curve
Clearance Milestones
50% Remaining
4 hours
≈ 125 mcg remaining
25% Remaining
8 hours
≈ 62.5 mcg remaining
12.5% Remaining
12 hours
≈ 31.25 mcg remaining
10% Remaining
13.288 hours
≈ 25 mcg remaining
5% Remaining
17.288 hours
≈ 12.5 mcg remaining
~1% (Clearance)
1.107 days
≈ 2.5 mcg remaining
Research Dosing Interval Guidance
Minimum interval (75% cleared)
Approximate minimum between doses to avoid accumulation
2 hours
Standard interval (1 half-life)
50% cleared — steady state reached in 4–5 doses
4 hours
Wash-out period
Time to near-full clearance (~5 half-lives, <5% remaining)
17.288 hours
Half-Life Reference Table — All Compounds
| Compound | Half-Life | Category | Notes |
|---|---|---|---|
| Semaglutide | 7 days | GLP-1 / Metabolic | ~7 days (subcutaneous, albumin-bound) |
| Tirzepatide | 5 days | GLP-1 / Metabolic | ~5 days (subcutaneous) |
| Retatrutide | 7 days | GLP-1 / Metabolic | ~7 days (estimated, GLP-1/GIP/Glucagon) |
| BPC-157 | 4 hours | Recovery & Healing | ~4 hours (subcutaneous/IM) |
| TB-500 (Thymosin Beta-4) | 8 hours | Recovery & Healing | ~8 hours (subcutaneous) |
| AOD-9604 | 30 minutes | Recovery & Healing | ~30 minutes (short-acting fragment) |
| KPV | 1 hour | Recovery & Healing | ~1 hour (tripeptide) |
| CJC-1295 w/DAC | 8 days | GH Secretagogues | ~8 days (DAC extended half-life) |
| CJC-1295 No DAC (Mod GRF) | 30 minutes | GH Secretagogues | ~30 min (no drug affinity complex) |
| Ipamorelin | 2 hours | GH Secretagogues | ~2 hours (subcutaneous) |
| GHRP-2 | 1.5 hours | GH Secretagogues | ~1.5 hours |
| GHRP-6 | 1.5 hours | GH Secretagogues | ~1.5 hours |
| Sermorelin | 12 minutes | GH Secretagogues | ~10-12 minutes (rapid cleavage) |
| Tesamorelin | 7.8 minutes | GH Secretagogues | ~8 minutes (trans-3-hexenoic acid stabilized) |
| MK-677 (Ibutamoren) | 1 day | GH Secretagogues | ~24 hours (oral non-peptide GHS) |
| Selank | 7.8 minutes | Cognitive / Nootropic | ~8 minutes (rapid enzymatic degradation) |
| Semax | 10.2 minutes | Cognitive / Nootropic | ~10 minutes |
| DSIP | 30 minutes | Cognitive / Nootropic | ~30 minutes |
| Epitalon | 1 hour | Longevity / Anti-Aging | ~1 hour (subcutaneous) |
| MOTS-c | 30 minutes | Longevity / Anti-Aging | ~30 minutes (mitochondrial peptide) |
| Humanin | 30 minutes | Longevity / Anti-Aging | ~30 minutes |
| SS-31 | 30 minutes | Longevity / Anti-Aging | ~30 minutes (mitochondria-targeted) |
| GHK-Cu | 30 minutes | Longevity / Anti-Aging | ~30 minutes (rapid tissue distribution) |
| Kisspeptin-10 | 4.8 minutes | Hormonal / Endocrine | ~5 minutes (rapid GnRH pulse trigger) |
| Oxytocin | 4.8 minutes | Hormonal / Endocrine | ~5 minutes (plasma half-life) |
| PT-141 (Bremelanotide) | 2.7 hours | Hormonal / Endocrine | ~2.7 hours (subcutaneous) |
| Melanotan II | 1 hour | Hormonal / Endocrine | ~1 hour (subcutaneous) |
| NAD+ (IV) | 1.8 minutes | NAD+ / Metabolic | ~2 minutes (rapid conversion to metabolites) |
| NMN (Precursor) | 1 hour | NAD+ / Metabolic | ~1 hour to peak NAD+ elevation |
| SS-31 Fragment | 30 minutes | Recovery & Healing | ~30 minutes |