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Stack tool

Peptide Stack Builder

Select multiple research peptides and the builder will check pairwise interactions, lay out a 7-day administration schedule, and estimate the minimum weekly research mass required.

Build your research stack

Toggle peptides; the schedule and interaction check update live.

Pairwise interactions

  • BPC-157 + TB-500caution

    Frequently co-investigated for healing; no documented adverse pairwise interaction.

Weekly schedule

Approx. minimum weekly research mass: 6.45 mg

PeptideMonTueWedThuFriSatSun
BPC-157
250 mcg · daily
TB-500
2000 mcg · twice weekly
Ipamorelin
100 mcg · daily
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How the stack logic works

The builder iterates pairwise across every selected peptide and checks the interaction dataset for documented overlaps — most commonly identical-mechanism stacks (two GLP-1 agonists, two GHRH analogs) where literature does not support concurrent investigation. Each peptide's default administration frequency (daily, twice-weekly, weekly, etc.) is then mapped to specific weekdays so that the resulting schedule respects pulsatility and half-life constraints.

Why pairwise checks matter

Two GHRH analogs (for example CJC-1295 and Tesamorelin) compete for the same receptor and provide no additive benefit — they can in fact accelerate receptor desensitisation. By contrast, the classic GHRH + GHRP pairing (CJC-1295 + Ipamorelin) is one of the best-studied research combinations because the two peptides act on distinct receptors with synergistic downstream signalling.

Supporting research

  • Sigalos JT, Pastuszak AW, The Safety and Efficacy of Growth Hormone Secretagogues, Sex Med Rev, 2018.
  • Khorram O et al., Effects of a GHRH analog on GH and IGF-I in older men, J Clin Endocrinol Metab, 1997.
  • Frias JP et al., Tirzepatide versus Semaglutide Once Weekly, NEJM, 2021.

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Frequently asked questions

What is a research peptide stack?
A research peptide stack is a deliberate combination of two or more peptides selected to investigate complementary mechanisms — for example pairing a healing-class peptide with a growth-hormone-axis peptide. The stack builder schedules each peptide on the days its half-life and pulsatility suggest.
Why does the builder warn against two GLP-1 agonists in the same stack?
Semaglutide, tirzepatide and retatrutide all act on the GLP-1 receptor. Combining two of them compounds the gastric and metabolic effects beyond any published research-stage protocol, with no additive benefit and significantly increased adverse-event probability.
How does the stack builder generate a weekly schedule?
Each peptide in the dataset has a default research frequency (daily, twice weekly, weekly, etc.). The builder maps that frequency onto a 7-day grid, spacing twice-weekly peptides across days 1 and 4 and weekly peptides on day 1.
Can the stack builder calculate cost?
The weekly research mass shown is the minimum cumulative dose (low-end research range) for the selected peptides. To convert to cost, multiply by the per-mg price from your reference supplier — Phase 6 of the site roadmap will add an automatic cost estimate.
What is the safest classic research stack?
The BPC-157 + TB-500 healing stack is one of the most studied pairwise combinations because the two peptides act on distinct mechanisms — BPC on nitric-oxide and angiogenic pathways, TB-500 on actin sequestration. No documented pairwise adverse interaction.