Americans are buying more fish-oil supplements than ever ... which indicates that the USP has tested and verified the claimed ingredients, potency, and manufacturing process.

Chews, in general, tend to have more extraneous ingredients added for flavor, texture, and shelf stability. In contrast, other forms of fish oil for dogs have relatively simple ingredient lists ...

Supplements may contain fish oil or omega-3s along with other ingredients, like antioxidants. These ingredients may act synergistically together, so we shouldn't jump to the conclusion that taking ...