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L-theanine is a compound that may support thinking, sleep, and relaxation and help with weight loss, blood pressure, and more. Research suggests that L-theanine might provide a range of health benefits, which may include improved mental focus and better sleep quality. Theanine /'?i??ni?n/, also known as L-?-glutamylethylamide and N5-ethyl-L-glutamine, is an amino acid analogue of the proteinogenic amino acids L-glutamate and L-glutamine and is found primarily in particular plant and fungal species.[3][4] It was discovered as a constituent of green tea in 1949; in 1950, it was isolated from gyokuro leaves.[5] It constitutes about 1–2% of the dry weight of green tea leaves.[4] Theanine provides a unique brothy or savory (umami) flavor to green tea infusions. The potential health benefits associated with the consumption of L-THE include improvements in emotional status, quality of sleep [29,37], suppression of hypertension [38], and improvements in mood and cognition [39]. Additionally, consumption of L-THE in combination with caffeine promotes antioxidant and anti-inflammatory activity in the brain that may reduce the risk of cognitive impairment [40]. The current evidence on the consumption of L-THE in humans and its effects on stress and anxiety is equivocal. To date, the majority of evidence is based on animal research, which has commonly used pure L-THE, and in combination with other bioactives such as caffeine [41] and catechins that can potentially have synergistic and in some cases potentially antagonistic effectsRealted Pages:
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