Promises of glowing skin and stronger joints sound great. The science behind collagen supplements is more complicated.

If you apply the collagen mask and feel immediate tingling, burning, or see redness in your skin, she recommends taking it ...

We spoke with experts to find the best pure and effective creatine supplements. Here's what we recommend, whether you're looking for unflavored, gummy or powder.

We tested over 50 protein powders and asked dietitians to select the 13 best for taste, weight loss, muscle gain, and more, including Thorne, Quince, and Orgain.