Skincare Ingredient Glossary

Plain-English, general definitions for terms that come up frequently in PDRN skincare and cosmetic aesthetics discussions. These definitions are educational only and do not describe any specific product's formulation or claims.

PDRN: Short for polydeoxyribonucleotide, a nucleotide-based ingredient concept commonly discussed in cosmetic skincare and aesthetics marketing.
Polynucleotides: A broader term for chains of nucleotides; PDRN is one specific type discussed within this category.
Peptides: Short chains of amino acids used widely across mainstream skincare formulations, often marketed for skin-support benefits.
Exosomes: Cell-derived particles discussed in cosmetic skincare and aesthetics as part of "regenerative" ingredient marketing.
Hyaluronic Acid: A moisture-binding ingredient widely used in skincare to support skin hydration.
Niacinamide: A form of vitamin B3 commonly included in skincare formulations aimed at supporting overall skin appearance.
Retinoids: A category of vitamin A derivatives used in skincare, ranging from over-the-counter to prescription strength.
Growth Factors: Proteins discussed in skincare marketing in connection with cell signaling and skin-support themes.
Amino Acids: The building blocks of proteins and peptides, sometimes included directly in skincare formulations.
Barrier Support: A general skincare term referring to ingredients or routines positioned as supporting the skin's outer protective layer.
Collagen: A structural protein in skin tissue, frequently referenced in skincare marketing around firmness and texture.
Elastin: A protein in skin tissue associated with elasticity, often mentioned alongside collagen in marketing copy.
Microneedling: A cosmetic procedure involving controlled micro-injuries to the skin, generally performed by trained providers.
Serum: A lightweight, often higher-concentration topical skincare format, typically applied before moisturizer.
Ampoule: A concentrated topical format, often used for short, intensive treatment periods.
Topical Skincare: Any skincare product applied directly to the skin's surface, as opposed to in-office or injectable treatments.