caffeine

Quick Summary Taurine is not a stimulant — unlike caffeine, it doesn’t wake you up, and may even soften caffeine’s kick. Best food sources: scallops, mussels, clams, dark tuna, and dark poultry meat. Plants have almost none. Typical supplemental range: 500–2,000 mg/day; the safe upper limit for healthy adults is around 3,000 mg/day. Human research