Skincare — Ingredients
Peptides, ceramides and actives — explained simply.
Every label lists them. Here is what peptides, ceramides, urea, BHA and other actives in skin care actually do, and which ones your skin needs.
7 minute read
Written and reviewed by Beauty World Editorial · Last reviewed October 2026
Basics
What are actives in skin care?
'Actives' are ingredients proven to change the skin — for example retinoids, vitamin C, exfoliating acids (AHA/BHA), niacinamide and azelaic acid. Use one or two at a time; stacking too many causes irritation.
Peptides
What are peptides in skin care products?
Peptides (also called polypeptides) are short chains of amino acids — the building blocks of collagen. In serums and creams they act as messengers that support firmness and a smoother look. They are gentle, suit sensitive skin and pair well with almost everything.
Ceramides
What are ceramides in skin care?
Ceramides are fats that naturally make up about half of your skin barrier. Creams with ceramides refill those gaps, so they help dry, sensitive, eczema-prone or over-exfoliated skin hold onto moisture.
Others
Other ingredients you'll see
BHA (salicylic acid)
Oil-soluble exfoliant that clears inside pores — best for blackheads and oily skin.
AHA (glycolic, lactic)
Surface exfoliants for dullness and texture.
Urea
Hydrates at low %, softens rough skin at 10%+ — great for dry legs and heels.
Hyaluronic acid
Draws water into the skin for instant plumpness.
