Home Nutrition Studying About L-Theanine Advantages – Sharon Palmer, The Plant Powered Dietitian

Studying About L-Theanine Advantages – Sharon Palmer, The Plant Powered Dietitian

Studying About L-Theanine Advantages – Sharon Palmer, The Plant Powered Dietitian


L-theanine in tea and dietary supplements could have advantages for nervousness, mind well being, and sleep. Be taught extra about l-theanine advantages on this professional overview.

When you’re just like the hundreds of thousands of people who find themselves in search of pure reduction for points like nervousness, stress, insomnia, and mind well being, you may need heard a couple of complement or compound present in tea known as l-theanine. What’s l-theanine? L-theanine is a water-soluble, nonprotein amino acid that’s naturally present in inexperienced and black tea leaves, in addition to sure sorts of mushrooms. The leaves of the Camellia sinensis plant are used to make inexperienced, black, and oolong tea, and include average quantities of l-theanine. The quantity of l-theanine current in tea is determined by a number of variables, together with the number of tea, the geographic area it was grown in, and when and the way it was harvested. Nevertheless, a cup of inexperienced tea sometimes comprises 8-30 mg of l-theanine, whereas complement types of the amino acid are normally offered in 200 mg or 400 mg doses.  L-theanine will not be made by the human physique, neither is it a vital nutrient that have to be obtained from the weight loss program, however that’s to not say it shouldn’t be included within the weight loss program. Regardless of l-theanine not being categorised as a vital nutrient, researchers are learning how its supplemental use could present a variety of well being advantages, specifically for serving to nervousness, stress, insomnia, and cognition.

L-theanine dietary supplements can be found, together with as an ingredient in lots of wellness blends. 

Additional analysis is required to totally perceive the complete vary of results that l-theanine dietary supplements have on human well being. Nevertheless, it’s believed to be related to a rise in neurotransmitters, alpha mind wave exercise, and cell safety from injury by free radicals. Research topics have been reported to have elevated ranges of serotonin, dopamine, and gamma-aminobutyric (GABA) within the mind after taking l-theanine, which means that l-theanine could improve neurotransmitters. Individuals have additionally reported feeling extra relaxed, calm, and targeted after taking l-theanine dietary supplements, which researchers imagine could possibly be attributed to a rise in alpha mind wave exercise. Moreover, l-theanine is understood to include antioxidant properties, which can assist shield cells from injury in opposition to free radicals within the physique. Though analysis is ongoing, research have proven that this complement can present a variety of advantages, together with improved cognitive operate, an improved immune system, lowered blood strain, lowered stress, enhanced temper, and higher sleep.

L-theanine is a naturally discovered ingredient in inexperienced and black tea

4 L-Theanine Advantages

Analysis has discovered the next potential well being advantages for l-theanine consumption. 

1. Improves Cognitive Operate

A examine by which individuals got a 100 mg complement of l-theanine or a placebo confirmed that the individuals who got the l-theanine made fewer errors of their consideration activity than the management group. Associations have additionally been made between taking l-theanine with caffeine and an excellent higher improve in focus and focus.

2. Lowers Stress and Blood Strain

Researchers have discovered that average doses of l-theanine can decrease the resting coronary heart price and assist decrease spikes in blood strain in response to irritating conditions the place individuals’s blood strain beforehand spiked. In a single examine, a 200 mg dose of l-theanine lowered the resting coronary heart price of contributors, which can assist cut back stress and promote rest.

3. Improves Leisure and Sleep

Many individuals drink inexperienced or black tea within the evenings to calm down and put together themselves for night time’s relaxation. One of many causes for tea’s enjoyable properties is probably going l-theanine.  Consuming l-theanine has been proven to sluggish the resting coronary heart price, assist in rest, and promote extra deep and restful sleep. Researchers from one examine noticed that doses of 250-400 mg of l-theanine improved sleep in animals and people.

4. Improves the Immune System

A number of research have demonstrated how l-theanine can profit the immune system.  Though extra analysis is required, research have linked the supplementation of l-theanine to a lower in higher respiratory infections, improved intestinal tract irritation, and, when coupled with the antioxidant properties of inexperienced tea, to profitable flu prevention.

A wide range of inexperienced and black teas include l-theanine

Who Ought to Take L-theanine?

What’s the l-theanine dose for nervousness and different advantages? The advisable dose sometimes ranges from 200-400 mg per day, however this varies relying on the product and the person, and extra analysis is required to find out correct doses. These dietary supplements can be found in capsule, pill, tender gel, and powder kind; you should purchase dietary supplements from well being meals shops, pharmacies, and on-line retailers. As with all complement, selecting a reputable model and following the directions is important. I all the time suggest third-party examined dietary supplements. The most typical seals to search for are NSF-certified, BSCG-certified, and USP-verified. Though L-theanine is mostly secure, it may react with sure drugs and isn’t match for everybody. Due to this fact, it’s also essential to speak to your physician earlier than taking l-theanine dietary supplements, particularly in case you are pregnant, receiving chemotherapy therapies, or taking blood strain drugs. One secure solution to benefit from the anti-anxiety advantages of l-theanine is thru curling as much as a cup of inexperienced or black tea extra typically, as is the custom in lots of healthful weight loss program patterns, such because the Japanese weight loss program. 

For extra blogs on well being and wellness, try a few of my newest: 

Written by Anna Tobin, dietetic intern with Sharon Palmer, MSFS, RDN


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Fontaine, D., & Mehta, F. (2021, January 20). L-Theanine: Dosage, Advantages, and Aspect Results. Healthline. Retrieved August 24, 2023, from https://www.healthline.com/well being/l-theanine

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