Stress, Cognitive Function, Adrenal Support


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100% Vegan

Organic Ingredients

Doctor Formulated

No Pesticides

Potential Benefits

Lowers Cortisol Levels
Protects from Adrenal Damage
Increases Brain Function
Supports Healthy Sleep Patterns

Servings & Directions

1 Capsule per Serving
60 Servings per Bottle
Directions: Take on an empty stomach with a glass of water. For optimal effectiveness, this formula should be taken every four hours throughout the day to compensate for the half-life of theanine in the body.


Research Documents

Stress — it’s unavoidable and often uncontrollable. When your body is stressed, it releases cortisol. Over a long period of time, the overproduction of cortisol can wreak havoc on your health and weaken your immune system.

Our solution: our suntheanine formula that contains plant based organic l theanine derived from green tea leaves. L-Theanine prevents the body from elevating cortisol levels and stimulates relaxing alpha waves in your brain, allowing for better focus during the day, and better recovery while you sleep at night.

100% Vegan

No Chemical Solvents


Doctor Formulated

No Animal Testing

NO Preservatives


Theanine acts as a precursor to dopamine in the brain.

Theanine acts as a precursor to dopamine in the brain. Dopamine is the second largest brain chemical by volume and plays a vital role by inhibiting the brain’s ability to access adrenaline.


A plant based nutrient to promote a balanced and stress free state of awareness

Promotes lower stress levels, battles anxiety, boosts alpha brain wave activity in the brain, and supports adrenal gland health.



Our Zuma Nutrition team takes pride in the formulation and efficacy of our products. The high quality Suntheanine in this L Theanine Supplement is completely water soluble, simply take on an empty stomach for optimal effectiveness. If you have ever experienced queasiness or nausea from supplements it is likely due to improper sorting of nutrients. Through taking water soluble nutrients together on an empty stomach, the nutrients can be absorbed simultaneously and completely with no nausea or queasiness.


L-theanine is an amino acid found most commonly in tea leaves and in small amounts in bay bolete mushrooms. L-theanine is not an essential amino acid, but it offers unique benefits to health, and supplementing with natural L theanine can be very beneficial to mood and brain function. Natural L-theanine may affect the levels of certain chemicals in the brain, including serotonin and dopamine, which influence mood, sleep, and emotion, and cortisol, which helps the body deal with stress. Organic L Theanine supplements can help to improve mental and emotional well being by affecting these important chemicals in the brain. L-Theanine capsules have been shown to prevent the body from elevating cortisol and stimulates relaxing alpha waves in your brain, allowing for better focus during the day, and recovery while you sleep at night.

Supplementing with organic l theanine capsules may lower cortisol levels, protect from adrenal damage, increase brain function, and support healthy sleep patterns. Supplementing with l-theanine may also increase cognitive performance. Some studies have shown natural l theanine supplementation may even help with weight loss. Suntheanine may also boost the immune system, and lower blood pressure.

The FDA has classified L-theanine as “generally recognized as safe.” This classification means that they believe L-theanine to be safe when people use it as the packaging suggests. However, women who are pregnant or breastfeeding should not use L-theanine.