L-theanine is an amino acid typically found in tea leaves and specific types of mushrooms. It is quite popular due to its relaxing effects on the mind and body, making it an attractive supplement ...
Some L-Theanine supplements may also contain other ingredients, such as caffeine or herbs, that can enhance their effects. Be sure to research any additional ingredients and their potential ...
To single out possible effects of L-theanine on the cognitive function of older Japanese adults, the 69 participants in the first study consumed capsules of either L-theanine or a placebo ...