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L-theanine is an amino acid found mainly in green and black tea. Research suggests that around 200 to 400 milligrams (mg) per day may help manage anxiety and stress, though more research is necessary.
Human Benefits of Green Spaces Reviewed March 2025 | Written by: Rebecca Pineo, Botanic Gardens Intern and Susan Barton, Extension Specialist Interaction with gardens and natural spaces offers a ...
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