A humble kitchen herb just got a surprising lab-tested reputation as a stress-time brain booster. In a double-blind study of 30 healthy young adults, a single 600 mg dose of dried sage leaf improved multitasking performance and boosted alertness, calmness and contentedness. But the twist is that a smaller 300 mg dose cut anxiety, then lost that effect under stress and even hurt later performance. Here is how the acetylcholine angle works, what the results really show, and the limits and safety notes you need before you reach for the spice rack.
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