Medically reviewed by Jamie Johnson, RDN Taurine is an amino acid concentrated in the brain, heart, eyes, and muscles. The body naturally produces taurine from the amino acid cysteine. Protein-rich ...

Cooperman said ConsumerLab.com (which sells subscriptions to its reviews) tries to identify the best supplements to test, not the worst. Even so, one product out of five fails, he said.

Melissa Nieves, LND, RD, is a registered dietitian with Practical Nutrition, LLC. She also works as a bilingual telehealth dietitian for Vida Health Program. Rich Scherr is an updates strategist ...