Section
Guides
6 pages in this section, most recently updated September 4, 2026. Each opens with a plain-English summary and cites its sources.
01 · Guides
FeaturedMethodology and the A to D grading scale
You'll get: This site grades each peptide from A to D by the kind of human evidence that exists for one stated use.
How this site grades peptide evidence: four letters for the kind of human evidence that exists, one flag for a published FDA safety concern, and the rules for what counts, what does not, and why a negative trial and a positive one can share a letter.
Updated September 4, 2026
02 · Guides
The FDA 503A bulks list, explained for peptide buyers
You'll get: A pharmacy may only compound a drug from an ingredient that passes one of three FDA tests, and most peptides pass none.
What the FDA lets a pharmacy compound from, what the bulks list and its categories are, and what the 2023 peptide safety flags mean for your vial.
Updated September 4, 202603 · Guides
FeaturedHow to read a peptide study in ten minutes
You'll get: You can check a peptide claim in ten minutes with the study abstract and six plain questions.
Six questions to ask of any study a peptide seller cites: which molecule, which species, what control, what endpoint, who ran it, and has anyone repeated it. Worked examples from TB-500, epitalon, MOTS-c and the tesamorelin label.
Updated September 4, 202604 · Guides
Why peptide 'stacks' fail evidence standards, and why this site publishes no doses
You'll get: A stack combines two or three peptides that each have little or no human evidence, and the combination has none.
A stack multiplies unknowns. Each component has at best one small trial; the combination has none; the doses come from forums; the product is a research chemical. This page sets out why combination claims cannot be evaluated, and why pairing dosing content with reconstitution instructions is the line FDA draws for unapproved drugs.
Updated September 4, 202605 · Guides
Storage and handling of prescribed peptide medication, per label
You'll get: Two approved peptide drugs, Egrifta and Vyleesi, have FDA labels that say how to store them.
What the Egrifta SV, Egrifta WR and Vyleesi labels say about temperature, light, reconstitution, and when to discard, side by side. For medication a prescriber prescribed and a pharmacy dispensed. With a note on why a compounded product's label, not these, governs a compounded product.
Updated September 4, 202606 · Guides
Glossary: the terms on this site, defined
You'll get: This page defines the legal and research words used across the site in plain terms.
Plain definitions of the legal and research words used on this site: 503A, bulks list, Category 1 to 3, PCAC, beyond-use date, placebo, RCT and more.
Updated September 4, 2026