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What is Tretinoin?

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Tretinoin is one of the best anti-aging ingredients in dermatology.
With continued use, it promises to tighten skin, increase collagen production, reverse the signs of aging, treat acne and hyperpigmentation.
Tretinoin (also known as all-trans retinoic acid) is a pharmaceutical derivative of vitamin A. Retinoic acid is a necessary component of human biology that facilitates growth and development.
It can be found in foods like salmon, egg yolks, grassfed butter and cream, cod liver oil, beef liver.

Tretinoin is considered one of the most powerful retinoids available. The most recognized prescription name for it is Retin-A, but there are other brands too: Acnetion, A-Ret, Acnelyse. All of these require a doctor’s prescription. However, weaker retinoids can be found over the counter and will be listed as retinyl palmitate, retinol, or retinaldehyde in a product’s ingredient list.
Upwards of 80% of it remains on the skin’s surface. As an aside, tretinoin cream has been shown to penetrate a little bit better than tretinoin gel (by about 5%).