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human reports are small and unreplicated
The timeline depends on the tissue, injury severity, research protocol, and outcome being measured
PMC 2690020
It is a form of sorbic acid, a naturally occurring fatty acid which is easily metabolized in the body
doi: 10.1016/j.survophthal.2005.11.005 283 LinHOuyangHZhuJHuangSLiuZChenSet al
Summary of key findings:(4) Stress Markers: Neither L-theanine nor L-tyrosine significantly reduced physiological stress indicators such as salivary alpha-amylase, secretory immunoglobulin A, heart rate, or state anxiety scores during the stress challenge
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