Collagen and Estrogen: Why Your Skin Changes After 40

You looked in the mirror one morning and your face was just… different. Not older-in-the-way-you-expected different. More like someone let the air out overnight. Cheeks flatter. Jawline softer. Fine lines that showed up uninvited and moved in for good. You are not imagining it, and you are not being vain. Here is the number nobody […]