No, L-theanine does not contain caffeine. L-theanine is an amino acid naturally found in tea leaves, particularly in green tea, and it is entirely separate from caffeine. However, L-theanine is often used to complement caffeine, as it may help mitigate some of caffeine's potential side effects, such as jitteriness or restlessness.
Does L-Theanine Contain Caffeine?
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