Retinoids/Tretinoin are a kind of vitamin A derivatives. Clinical studies have shown that Retinoids/Tretinoin (topical application) can prevent skin disorders such as severe acne or psoriasis. Incidently, it is also discovered that Retinoids/Tretinoin may help in promoting hair growth, especially when used in conjunction with minoxidil. It is speculated that retinoids enhances penetration and abosrption of minoxidil into hair follicles. You need a doctor's prescription to obtain Retinoids / Tretinoin medication.
Retin-A is the brand name or trade name for Tretinoin.
Products formulated with vitamin A derivatives are available from: