L-glutamic acid is a nonessential amino acid, meaning that your body can produce it by itself and doesn’t need to get it from food. MSG is a white, odorless, crystalline powder commonly used as ...

Case in point: polyglutamic acid (PGA), a water-soluble peptide that's quickly shaking up the beauty industry. Research on naturally occurring poly-γ-glutamic acid (γ-PGA) — a molecule found ...