Peptide Basics
Foundational reading with no compound attached: what peptides are, how they are manufactured, and how to weigh the evidence behind them.
- Nootropic Peptides: What the Research ShowsNootropic peptides are short-chain amino acid sequences — structurally classified as [peptides](/foundational-what-is-peptide) — that research has examined for their effects on cognitive function, mood regulation, anxiety, and neuroprotection.
- Tissue Repair Peptides: What the Research ShowsTissue repair peptides are short-chain amino acid sequences — typically fewer than 50 residues — that research has linked to processes involved in wound healing, connective tissue regeneration, and inflammatory regulation.
- Growth Hormone Secretagogues: What the Research ShowsA growth hormone secretagogue (GHS) is a compound — typically a [peptide](/foundational-what-is-peptide) or small molecule — that stimulates the pituitary gland to release endogenous growth hormone rather than supplying exogenous growth hormone directly.
- Longevity Compounds: What the Research ShowsLongevity compounds are a class of research substances studied for their potential to influence biological aging processes at the molecular and cellular level.
- Metabolic Peptides: What the Research ShowsMetabolic peptides are [short-chain amino acid sequences](/foundational-what-is-peptide) that interact with biological systems governing energy expenditure, glucose regulation, fat metabolism, and appetite signaling.
- Mitochondrial Peptides: What the Research ShowsMitochondrial peptides are short amino acid chains encoded within the mitochondrial genome — the small, circular strand of DNA housed inside mitochondria rather than in the cell nucleus.
- How Are Peptides Made?Peptide synthesis is the chemical or biological process of joining amino acids in a defined sequence to produce a [peptide](/foundational-what-is-peptide) — a short chain of amino acids linked by peptide bonds.
- What Is a Peptide?A peptide is a short chain of amino acids linked together by peptide bonds, smaller than a full protein but built from the same molecular components.
- What Do the Numbers in Peptide Names Mean?The numbers in peptide names are not arbitrary product codes — they encode specific structural or sequence information about each compound.
- What Is a Peptide Blend?A peptide blend is a formulation that combines two or more individual peptides into a single preparation, with the intent of studying how those compounds interact — either additively or synergisticall
- Naturally Occurring vs Synthetic Peptides: What's the Difference?The distinction between naturally occurring and synthetic peptides comes down to origin: naturally occurring peptides are produced by living organisms through biological processes, while synthetic peptides are manufactured outside of a living system — typically in a laboratory using chemical synthesis.
- What Is a Peptide Half-Life?A peptide half-life is the time it takes for the concentration of a peptide in a biological system to fall to half its original value.
- What Does "Research Use Only" Mean?"Research use only" (RUO) is a regulatory designation applied to compounds, reagents, and materials that have not completed the approval process required for therapeutic or diagnostic use in humans.
- What Is Peptide Purity and How Is It Measured?Peptide purity is a quantitative measure of how much of a given compound in a sample is the intended peptide sequence, expressed as a percentage of total content by weight or peak area.
- How Do Peptides Work in the Body?A [peptide](/foundational-what-is-peptide) is a short chain of amino acids linked by peptide bonds — structurally simpler than a full protein, but capable of highly specific biological activity.
- Why Are Peptides Injected Instead of Taken Orally?Route of administration refers to the method by which a compound enters the body — oral ingestion, subcutaneous injection, intravenous infusion, topical application, and others.
- Peptide vs Protein vs Amino Acid — What's the Difference?An amino acid is a small organic molecule that serves as the fundamental building block of all proteins and peptides in living organisms.
- How Research Peptides Are MadeSolid-phase synthesis, recombinant expression, and why manufacturing route affects what a purity figure actually means.
Compound hubs
Tissue Repair
Metabolic
- 5-Amino-1MQNNMT Inhibitor
- AOD-9604Lipolytic hGH Fragment
- CagrilintideMetabolic Compound
- RetatrutideTriple Agonist Peptide
- TesamorelinGHRH Analogue
- TirzepatideDual Agonist Peptide
Growth Hormone Secretagogue
- IpamorelinGrowth Hormone Secretagogue
Immune
- Thymosin Alpha 1Immune Peptide
Pigmentation
- Melanotan 2Melanocortin Peptide
Endocrine / Reproductive
- KisspeptinEndocrine Peptide
Antioxidant
- GlutathioneAntioxidant
Blend
- GLOW BlendPeptide Blend
- KLOW BlendPeptide Blend
- Wolverine BlendPeptide Blend
Mitochondrial
- SS-31Mitochondrial Peptide
Sleep
- DSIPSleep Peptide