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If a multivitamin isnt the right step, you can also try a pre-workout supplement, which is designed for muscle building and exercise expansion, rich with amino acids and caffeine

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Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study

Some researchers also suggest it may interact with neurons via the Mitogen-Activated Protein Kinase (MAPK) pathway, which regulates intercellular signaling [15]