Ingredient

Retinoids

Reviewed by SkinKnowledgeBase Editorial TeamSources verified May 17, 2026Last updated May 17, 2026
A skin cross-section illustration showing several related vitamin A molecule shapes supporting smoother-looking texture.
Retinoids are a family of vitamin A-related ingredients, not one single ingredient strength.

Quick Summary

Retinoids are a family of vitamin A-related ingredients used in skincare and dermatology contexts. Retinol is one member of that family, while retinaldehyde, adapalene, tretinoin, and other forms sit elsewhere in the retinoid landscape. In cosmetic skincare, retinoids are usually discussed for smoother-looking texture, fine-line appearance, and visible-aging routines.

What It Is

Retinoids are not a single ingredient strength. The word describes a category that includes cosmetic forms, over-the-counter drug-context forms, and prescription forms. Retinol is a common cosmetic entry point, while adapalene and tretinoin are better understood with their specific product and regulatory context.

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Ingredient
Retinoids
Quick Summary
Retinoids are a family of vitamin A-related ingredients used in skincare and dermatology contexts. Retinol is one member of that family, while retinaldehyde, adapalene, tretinoin, and other forms sit elsewhere in the retinoid landscape. In cosmetic skincare, retinoids are usually discussed for smoother-looking texture, fine-line appearance, and visible-aging routines.
What It Is
Retinoids are not a single ingredient strength. The word describes a category that includes cosmetic forms, over-the-counter drug-context forms, and prescription forms. Retinol is a common cosmetic entry point, while adapalene and tretinoin are better understood with their specific product and regulatory context.