Sources starting with P

• PubMed — Azelaic acid properties and mode of action

  Peer-reviewed azelaic acid source supporting mechanism context.

• PubMed — Hyaluronic acid cosmetic review

  Peer-reviewed review summarizing hyaluronic acid research in cosmetic and skin-rejuvenation contexts.

• PubMed — Niacinamide and hyperpigmented spots

  Peer-reviewed niacinamide study supporting uneven tone and hyperpigmented-spot appearance context.

• PubMed — Tranexamic acid hyperpigmentation review

  Peer-reviewed tranexamic acid review supporting cautious tone-support context.

• PubMed — Vitamin C in dermatology

  Peer-reviewed vitamin C review supporting brightening and antioxidant context.