SAMe Supplements Guide (2026): Depression & Joint Evidence, Dose & Stability

SAMe is one of the few supplements with pharmaceutical-grade evidence: randomized trials find it comparable to some prescription antidepressants for depression, and it also has real data for osteoarthritis pain. The catch is dose and quality. Studied doses run high (400–1,600 mg/day, which gets expensive), the molecule is chemically unstable and needs enteric coating and fresh, foil-blistered stock, and it can trigger mania in bipolar disorder or interact with serotonergic drugs — so it's a talk-to-your-doctor supplement, not a casual one. Below: the evidence, dosing, and what to look for on the label.