(Click Benefits of Theanine for more information on what theanine is used for, including additional theanine uses.)
There are no known side effects of theanine. However, this probably reflects a lack of clinical studies with theanine (not a real absence of side effects).
(Click Theanine Side Effects to learn more, including potentially serious side effects that you should report immediately to your healthcare provider.)
Theanine Safety Information
Some people may be more likely to experience problems due to theanine. Therefore, you should talk with your healthcare provider before taking theanine if you have:
- Kidney disease, such as kidney failure (renal failure)
- Liver disease, such as liver failure, cirrhosis, or hepatitis
- Any other serious or chronic health condition
- Any allergies, including allergies to food, dyes, or preservatives.
Also, let your healthcare provider know if you are:
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Is Theanine Safe? for more information, including any available theanine warnings and precautions.)
It is not exactly clear how theanine works. It might work for
anxiety by increasing levels of gamma-aminobutyric acid (GABA), a brain chemical that is naturally calming. Theanine may also increase serotonin levels in the brain. It is thought that theanine may also protect nerves in the brain from damage seen in
Alzheimer's disease. In animals, Theanine lowers norepinephrine levels, which may help
lower blood pressure.
There is not yet enough scientific evidence to evaluate the effectiveness of theanine for any use.
Theanine Dosing Information
A safe and effective theanine dose has not been established. Be sure to follow the specific instructions on your particular theanine product.
Theanine Drug Interactions
What If I Take a Theanine Overdose?
It is not known exactly what to expect from a theanine overdose. If you think you may have taken too much theanine, seek medical attention immediately.
Theanine: Storage Methods
Refer to the label of your individual theanine product for information on how to best store theanine. Keep theanine and all other medications or supplements out of the reach of children.