The testers at GGR have personally tested dozens of collagen powders, ultimately naming the Transparent Labs Collagen Hydrolysate the best overall in our best collagen supplements roundup. After putting Transparent Labs Collagen to the test, expert reviewer Amanda Capritto, CPT, CES, CNC, CF-L1, CSNC, gave it an impressive overall score of 4.7 out of 5.