Is L-theanine the same as caffeine? No - the two are different, although they are both found in beverages, including green tea.īecause L-theanine tends to promote relaxation, while caffeine promotes alertness, the two have opposite but complementary effects. It is considered an excitatory neurotransmitter, but L-theanine binds to the same receptors in the brain as glutamate and therefore has opposite, inhibitory effects. Glutamine is needed to produce the neurotransmitter called glutamate. Glutamine is one of 20 naturally occurring amino acids in dietary protein and the most abundant amino acid in the bloodstream, making up 30 percent to 35 percent of the amino acid nitrogen in your blood. Both can be supportive of overall mental health and energy levels, but theanine is more capable of acting as a natural stress reliever. L-theanine and the amino acid glutamine are structurally similar but have different effects and benefits. It may help improve the effects of drugs used to treat cancer drugs.High blood pressure and other cardiovascular problems.Cognitive loss, dementia and Alzheimer’s disease.Anxiety, depression and other mood-related disorders.What does L-theanine do for you? It is used to help prevent and treat conditions, including: L-theanine is considered a nondietary, nonessential amino acid because even though it has certain benefits, we don’t require it from our diets. The greatest sources of L-theanine in our diets are green, black and white teas - but because most people don’t drink very large quantities of tea on a daily basis, L-theanine supplements can be beneficial.Īs we’ll cover more below, drinking tea and taking L-theanine supplements can help reduce the effects of stress, protect the brain, support the cardiovascular system and much more. It’s a unique amino acid because it’s not used to form proteins - unlike many other amino acids, such as l-carnitine, leucine, lysine, methionine or tryptophan - and is not used to make enzymes. Most people don’t acquire a lot of theanine from their diets since it’s not available in many commonly eaten foods. It is known as natural anxiolytic because it can have a calming, sedative effect on the body and mind without making you feel drowsy - which is why it’s often used to reduce anxiety, hyperactivity and sleep-related problems. What is L-theanine, and what is it used for? L-theanine (also called theanine or sometimes r-glutamylethylamide) is an amino acid that impacts nerve impulses in the brain and the release of neurotransmitters, including GABA.
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