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.
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.
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].
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. However, the cognitive functions for which theanine is effective are unclear.
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.
The most common side effect of L-theanine is drowsiness. It is not a sedative but can create a sedative-like effect. If you experience any unwanted side effects, stop taking L-theanine and see your doctor.
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.
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.
L-theanine, on the other hand, promotes relaxation and stress reduction without sedating. L-theanine can help foster a state of calm, attentive wakefulness. L-theanine has positive effects on both the mental and physical symptoms of stress, including lowering heart rate and blood pressure.
Another common reason why L-theanine might increase anxiety in certain people is if they consume it alongside excessive caffeine, especially if you are sensitive to caffeine. Lastly, L-theanine may interact with certain medications—especially stimulant drugs or those for high blood pressure.
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.
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) ...
Taking a daytime dose of L-Theanine may help you focus and maintain mental clarity as you go about your daily tasks. A nighttime dose, on the other hand, can help you wind down before getting ready for bed. When taking L-Theanine at night, it's best to take your dose between 30 minutes and an hour before bedtime.
“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.”
L-theanine is highly regarded for its unique ability to increase calm and focus, but without drowsiness or stimulation. It can improve your mood and ability to concentrate. Theanine can boost brain health and function now, and help prevent mental decline in the future.
Conclusion: Our study suggests that chronic (8-week) l-theanine administration is safe and has multiple beneficial effects on depressive symptoms, anxiety, sleep disturbance and cognitive impairments in patients with MDD.
Animal neurochemistry studies suggest that L-theanine increases brain serotonin, dopamine, GABA levels and has micromolar affinities for AMPA, Kainate and NMDA receptors.
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.
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 ...
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.
Ashwagandha dose:
For KSM-66 ashwagandha, the proper dose is 300 – 600 mg per day. This can be safely combined with l-theanine.
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.
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.
To boost mental focus or energy, try taking L-theanine first thing in the morning, ideally about 30 minutes before breakfast. Conversely, to help support better sleep, a 50-200mg dose of L-theanine 30-60 minutes before bed would be best.
However, the original claims relating to the calming effect of l-theanine show it is usually noted within 40–60 min after l-theanine ingestion at a dose of 50–200 mg. Effective dose of 200 mg of l-theanine in the present study to induce relaxation is well consistent with the work of Kobayashi et al.