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Side effects and risks. L-theanine is generally considered safe and well-tolerated when taken at appropriate doses. In general, it’s recommended that you don’t exceed 500 milligrams (mg) a day.
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...
If you're thinking about taking any herbal supplement as a treatment for anxiety, talk with your doctor or other medical professional first, especially if you take other medicines. The interaction of some herbal supplements and certain medicines can cause serious side effects.
There are no confirmed or direct side effects of consuming L-theanine. Generally speaking, it’s safe to drink teas and take supplements that contain L-theanine.
Side effects. Studies have not found side effects from using theanine supplements. Drinking lots of green tea can cause upset stomach and irritability from the caffeine. It's not clear if using...
In combination with caffeine: 12-100 mg L-theanine, 30-100 mg caffeine; Possible Side Effects. L-theanine is generally well tolerated by healthy adults.
If you're having a severe allergic reaction to L-theanine, symptoms may include breathing difficulties, itchiness, and rash. Call 911 and seek prompt medical attention if you have a severe allergic reaction or life-threatening symptoms. Anxiety medications: Theanine reduced anxiety in a clinical study.
Most people are unlikely to experience side effects when they take L-theanine, but the supplement may interact with some medications.
Although there are no reported side effects from taking L-theanine, consuming large amounts of green tea can cause nausea, irritability, and GI upset because of the caffeine content.
Is anyone familiar with taking L-theanine to calm your excitatory neurotransmitters? I am trying to slow taper my Ativan. Been taking .5 mg at night for 5 years.