Peptide Fundamentals
What peptides are, how they are studied and regulated, and a glossary of the terms used in peptide research.
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Pharmacy Compounding Advisory Committee and peptides: the July 2026 votes and the February 2027 meeting
The Pharmacy Compounding Advisory Committee (PCAC) is the outside expert panel, required by law, that advises FDA on which bulk ingredients pharmacies may compound under section 503A, including peptides such…
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Lyophilized peptide meaning: what freeze-dried means, and what it does not
A lyophilized peptide is a peptide that has been freeze-dried: frozen, then held under vacuum so the ice turns straight into vapor, leaving a dry powder or “cake” (FDA inspection…
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Do peptides cause cancer? The evidence for GLP-1 drugs, growth hormone peptides, BPC-157 and TB-500
No peptide has been shown to cause cancer in people, but that is not the same as proof that none does. The evidence differs by peptide group: GLP-1 drugs such…
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The FDA’s July 2026 peptide vote: what it means for BPC-157 and TB-500
The FDA PCAC peptide vote of July 23–24, 2026 was an advisory recommendation, not an approval. FDA’s Pharmacy Compounding Advisory Committee voted, by narrow margins, to recommend adding BPC-157, KPV,…
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Peptide legal status tracker 2026: FDA, compounding and WADA status by peptide
This peptide legal status tracker gives the US FDA, compounding, WADA and UK/EU status of the 11 peptides covered on PeptideWikis, checked against regulator pages on 2026-10-02. Two are FDA-approved…
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Category 1 vs Category 2 peptides: what FDA’s 503A compounding lists mean
Category 1 vs Category 2 peptides refers to two of the three interim lists the US Food and Drug Administration (FDA) keeps for bulk ingredients nominated for pharmacy compounding under…
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Research use only peptides: what the label means legally and why it matters
“Research use only” (RUO) on a peptide is the seller’s statement that the product is meant for laboratory or animal experiments, not for people. It is not an FDA approval,…
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503A vs 503B peptides: what each compounding pathway may do
503A and 503B are two sections of the US Federal Food, Drug, and Cosmetic Act that let compounded drugs skip FDA approval. A 503A pharmacy compounds against a patient-specific prescription…
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What are peptides? Peptides vs proteins, how they are classed, and legal status
Peptides are short chains of amino acids joined by peptide (amide) bonds. The US Food and Drug Administration treats chains of 40 or fewer amino acids as peptides and longer…
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WADA banned peptides 2027: which peptides are prohibited in sport
WADA’s 2027 Prohibited List takes effect on January 1, 2027 (WADA, 2026). Peptides are banned mainly under three classes, all prohibited at all times: S0 (non-approved substances, e.g. BPC-157), S2…