Understanding Skincare Science: The Niacinamide Deep Dive

I'm Trina Reneá, esthetician, skincare educator, and founder of a mission to demystify ingredient science. In my latest piece, I break down niacinamide—one of the most misunderstood yet powerful ingredients in skincare. You'll learn what makes it special, why concentration matters (two percent versus five percent), how it addresses everything from barrier damage to hyperpigmentation to aging, and exactly how to use it. I also share why professional facials amplify these benefits and why education matters, whether you're a consumer or a skincare professional. This is the kind of accessible, real-world skincare knowledge I share across my Substack, my skincare line, my consulting work with estheticians, and The Facial Bungalow. Skincare doesn't have to be complicated—it just needs to be explained well.

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