There are a lot of collagen supplements on the market. Look for these 3 main things...
1
Low Levels of Heavy MetalsYou'll want to review the Certificate of Analysis from a transparent brand with low levels of Lead, Mercury, Arsenic, and Cadmium.
2
Grass-Fed & Pasture-Raised
Support brands that are sourced from high-quality animals only (not factory-farmed animals).
3
Free Of Additives
Avoid collagen supplements that include added sugar, sweeteners, and flavorings.