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L-theanine is a non-essential, non-protein amino acid found mostly in tea leaves (like green and black tea) and in some mushrooms
Heres how it compares to some of the most studied research peptides: For a broader perspective on how peptides work together, the best peptides research guide provides an organized overview of the leading research compounds by category
doi: 10.1111/ejh.13935 7 BurnettH
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