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In this 2024 randomized controlled trial, researchers tested the impact of L-theanine (200 mg) and L-tyrosine (2000 mg) on stress markers and cognitive performance during a high-stress scenario
Protocol (adapted from refs 9 and 10) 1
Purity and dosing uncertainty: without third-party testing, you don't know what's in the vial
Appetite Regulation GIP Activity May support glucose regulation, insulin-related metabolic activity, and overall energy balance
In humans, and other mammals, the intestinal calcitriol-induced gene is the S100G (also known as CALB3) gene which encodes calbindin-D 9K
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