Answers to the
questions we hear most.

A peptide is a short chain of amino acids linked by peptide bonds. Peptides are typically defined as molecules containing between 2 and 50 amino acids. Above that length, the molecule is generally classified as a protein. Peptides function as signaling molecules, hormones, neurotransmitters, and structural components throughout the body.

The distinction is primarily about size. Proteins are longer amino acid chains (generally 50+ amino acids) with complex three-dimensional folding. Peptides are shorter and more flexible. This size difference has functional implications: peptides typically act as signaling molecules, while proteins more often serve structural or enzymatic roles.

The legal status of peptides varies significantly by jurisdiction and by specific compound. Some peptides (e.g., Tesamorelin, Bremelanotide, Thymosin Alpha-1) are FDA-approved as prescription medications. Others are research compounds without therapeutic approval. Some are explicitly restricted under controlled substances laws. Always verify the legal status of any specific peptide in your jurisdiction before purchase or use.

Most peptides are administered via subcutaneous or intramuscular injection due to their poor oral bioavailability (they are degraded by digestive enzymes). Exceptions include certain stable peptides like KPV that can survive oral administration, nasal sprays for compounds like Semax and Selank, and topical formulations for skin-active peptides like GHK-Cu.

The peptides with the most extensive clinical research include: Tesamorelin (FDA-approved for HIV-associated lipodystrophy), Bremelanotide / PT-141 (FDA-approved for HSDD), Thymosin Alpha-1 / Zadaxin (approved in 37+ countries for hepatitis and immune modulation), BPC-157 (extensive preclinical regenerative research), Epithalon (15+ years of Russian human longevity data), and GHK-Cu (decades of cosmetic and wound healing research).

A "research peptide" or "research chemical" designation indicates that the compound has not been approved for human therapeutic use by regulatory authorities like the FDA. These compounds are sold for in vitro laboratory research only. Their safety, efficacy, and appropriate dosing in humans have not been established through the standard regulatory approval process.

Yes. While many peptides have favorable safety profiles relative to small-molecule drugs, they can still cause adverse effects. Common categories include injection site reactions, immunogenic responses, hormonal disruptions (especially with GH secretagogues), water retention, and effects related to their pharmacological mechanism. Long-term safety data is limited for many research peptides.

Peptides are amino acid chains that typically signal through peptide receptors. SARMs (Selective Androgen Receptor Modulators) are non-peptide small molecules that selectively activate androgen receptors. They are chemically and pharmacologically distinct, with different mechanisms, side effect profiles, and regulatory statuses.

We prioritize peptides with substantive published research, peptides discussed widely in the research and wellness communities (so that we can provide an evidence-based counter to misinformation), and peptides with notable clinical or regulatory significance. We do not cover peptides solely because they are commercially marketed.

No. Explicitly no. Axiom Peptides is an educational and reference platform. Nothing here constitutes medical advice, diagnosis, treatment recommendation, or prescription. Always consult a qualified healthcare professional before making any health-related decisions, particularly those involving research compounds or off-label substances.

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