When taken by mouth: L-theanine is possibly safe when used short-term. Doses of up to 900 mg daily have been safely used for 8 weeks. It isn't clear if L-theanine is safe to use for longer periods of time. It might cause mild side effects, such as headache or sleepiness.
In fact, explains Kramer, just one 200 to 400mg capsule can ease stress, lower your cortisol levels, and get you to a state of zen in 20 minutes. And, if you want, you can safely consume L-theanine every day.
L-theanine is an amino acid naturally found in plant sources such as tea leaves and some mushrooms. L-theanine benefits include helping to support alertness, relaxation, and sleep. The appeal of L-theanine stems from its ability to support a state of alert relaxation, so it can calm you down without causing drowsiness.
The most common side effects of L-theanine dosage include headaches, nausea, and irritability. However, the nausea appears to be mostly linked with L-theanine being administered through green tea rather than dietary supplements.
As long as you follow the L-theanine supplement's dosage suggestions, you can safely take L-theanine daily. And because L-theanine is a 100% drug-free, non-habit-forming ingredient, it is generally considered safe for long-term use.
Substances that cause the release of high levels dopamine can be addictive, resulting in a compulsion to seek the perceived feeling of “reward.” However, L-theanine produces low enough levels of dopamine that has not been shown to produce “seeking” or addicted behavior in lab tests on rats or in the (more limited) ...
l-theanine (γ-glutamylethylamide), an amino acid in green tea, has been shown to affect brain functions by relieving stress disorders, improving mood, and maintaining normal sleep.
Dosing. L-theanine is naturally found in tea and some mushrooms. As medicine, L-theanine has most often been used by adults in doses of 200-400 mg by mouth daily for 4-8 weeks. Speak with a healthcare provider to find out what dose might be best for a specific condition.
L-theanine Dosage and Use
L-theanine is one of my most common treatments for anxiousness and may help any of the three sub-types. It's usually taken in doses from 50-100 mg once or twice daily. In more severe cases, it may be taken 3 or 4 times per day. It is not habit forming like many anti-anxiety medications.
Is L-theanine safe for long-term use? Yes. L-theanine is a safe and natural amino acid that can be taken long-term without any adverse effects. (6) However, you must always adhere to the dosage guidelines.
L-theanine, caffeine and their combination seem to improve sustained attention and overall cognitive performance in children with ADHD, possibly via decreasing mind wandering during exertion of attention.
The Best Time of Day to Take L-Theanine
If you're using l-theanine to boost cognitive function during the day, it's best to take l-theanine about 30 minutes (in capsule or pill form) before your morning coffee. You can also add it as a powder to your cup of coffee.
“A combination of magnesium with L-Theanine (an amino acid) will ease the tension in the physical body and settle anxiety as L-Theanine supports the production of calming neurotransmitters. Take this combination now twice daily rather than waiting until you feel tense or anxious.”
In addition, L-Theanine supplements are not for everyone. While the amino acid is considered safe for adults, children under the age of 18 should not take L-Theanine without the input of a doctor or pediatrician. In addition, pregnant or breastfeeding women should also consult their doctor before taking L-Theanine.
Pregnancy and breast-feeding:There is not enough reliable information about the safety of using theanine if you are pregnant or breast-feeding. Stay on the safe side and avoid use. Children: Theanine is POSSIBLY SAFE for children. Doses of 200 mg of theanine have been safely used twice daily for up to 6 weeks.
L-theanine may reduce brain fog symptoms such as memory problems and delayed reaction time when taken as a supplement. It may also help reduce stress and improve sleep, which may relieve brain fog symptoms.
In a randomized controlled trial in patients with mild cognitive impairment, L-theanine taken with green tea extract for 16 weeks had no significant effect on memory and attention, though a trend for an improvement in memory was seen midway through the trial [1].
Magnesium can decrease the absorption and effectiveness of numerous medications, including some common antibiotics such as tetracycline (Achromycin, Sumycin), demeclocycline (Declomycin), doxycycline (Vibramycin), minocycline (Minocin), ciprofloxacin (Cipro), levofloxacin (Levaquin), moxifloxacin (Avelox) and ofloxacin ...
WHAT IS L-THEANINE? Taylor Swift has been talking in interviews recently about supplementing her diet with L-Theanine to deal with stress and anxiety. L-Theanine is a naturally occurring compound found in green tea. It is an amino acid found in particular plant and fungal species.
Magnesium and calcium/multivitamin
But if you do take magnesium, Erin Stokes, ND, recommends not taking it at the same time as your multivitamin, as it may interfere with the absorption of smaller minerals found in the multivitamin, like iron and zinc.
However, if we're looking for a natural compound that can simultaneously improve your daytime mental performance and nighttime cognitive relaxation, L-theanine takes the cake—whether compared with melatonin or any other natural substance.
A calming effect is usually noted within 30 to 40 minutes after L-theanine is taken at a dose of 50 to 200mg, and typically lasts 8 to 10 hours. Moderate anxiety symptoms often improve with a regimen of 200mg once or twice daily.
Abstract. L-theanine, originally found in green tea, elicits various physiological effects, such as promoting relaxation, improving concentration and learning ability, and providing antianxiety-like and antidepressant-like properties.
L-theanine can increase certain neurotransmitters in your brain, including dopamine. Multiple studies have shown that L-theanine increases dopamine production, thus causing an antidepressant effect and enhancing cognitive function ( 32 , 33 , 34).
L-theanine acts within 30-60 minutes, while Ashwagandha takes time (up to a week) to feel the benefits. This creates a bridge effect where daily doses of L-theanine bridge the longer-term benefits of Ashwagandha.