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It is thought L-theanine plus caffeine could synergistically enhance brain function through their complementary actions: caffeine has mainly been shown to increase cognitive stamina and self-reported alertness, arousal, and vigor, while L-theanine has been shown to improve self-reported relaxation, tension, and calmness
A patch cannot be a supplement
These two peptides have been shown to increase endogenous growth hormone release, thus offering unwanted fat loss and increased muscle growth
The authors declare that they have no competing interests.
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