Home Ingredients AlphaWave® L-Theanine (NutriScience)
Stress & AnxietyCognitiveSleep Health

AlphaWave® L-Theanine (NutriScience)

Camellia sinensis
Evidence Level
Moderate
1 Clinical Trial
3 Documented Benefits
3/5 Evidence Score

AlphaWave® is a branded L-theanine from NutriScience, the calming amino acid found naturally in tea. L-theanine promotes a state of relaxed alertness, easing stress and supporting focus without sedation, and AlphaWave has been tested for safety and effects in a 28-day human trial.

Studied Dose 100 to 200 mg per day, taken as needed for calm focus or before sleep.
Active Compound L-theanine, an amino acid found in tea leaves that promotes alpha brain-wave activity and a calm, focused state.

Benefits

Calm without drowsiness

L-theanine promotes relaxation and eases stress while keeping the mind alert, a combination that makes it popular for daytime calm and focus.

Supported by Trial 1

Focus and attention

By increasing alpha brain-wave activity, L-theanine supports a settled, attentive state, and it pairs well with caffeine for smoother energy.

Supported by Trial 1

Sleep quality

Taken in the evening, L-theanine can help quiet a busy mind and support more restful sleep without the grogginess of sedatives.

Supported by Trial 1

Mechanism of action

1

Alpha brain-wave activity

L-theanine increases alpha waves associated with a relaxed yet alert mental state, the basis for its calm-focus reputation.

2

Neurotransmitter balance

It modulates GABA, serotonin, and dopamine and tempers excitatory glutamate signaling, supporting a calmer stress response.

Clinical trials

1
AlphaWave L-Theanine Safety and Efficacy — RCT
PubMed

Randomized, placebo-controlled 28-day trial of AlphaWave L-theanine supplementation. (Moulin et al. 2024, Neurology and Therapy)

Healthy adults.

AlphaWave L-theanine was safe and supported measures related to stress and relaxation over 28 days versus placebo.

Side effects and drug interactions

Common Potential side effects

GENERALLY WELL-TOLERATED — L-theanine is very safe and non-sedating at normal doses.
Side effects are rare; mild headache is occasionally reported.
No stimulant effects.

Important Drug interactions

Blood pressure medication — L-theanine may mildly lower blood pressure; monitor.
Stimulants — L-theanine is often combined with caffeine to smooth its effect.
Tell your doctor if you take medication for anxiety or sleep.

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Frequently asked questions about AlphaWave® L-Theanine (NutriScience)

What is AlphaWave® L-Theanine (NutriScience)?

AlphaWave® is a branded L-theanine from NutriScience, the calming amino acid found naturally in tea. L-theanine promotes a state of relaxed alertness, easing stress and supporting focus without sedation, and AlphaWave has been tested for safety and effects in a 28-day human trial.

What is the recommended dosage of AlphaWave® L-Theanine (NutriScience)?

The clinically studied dose for AlphaWave® L-Theanine (NutriScience) is 100 to 200 mg per day, taken as needed for calm focus or before sleep.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is AlphaWave® L-Theanine (NutriScience) used for?

AlphaWave® L-Theanine (NutriScience) is studied for calm without drowsiness, focus and attention, sleep quality. L-theanine promotes relaxation and eases stress while keeping the mind alert, a combination that makes it popular for daytime calm and focus.

Are there side effects from taking AlphaWave® L-Theanine (NutriScience)?

Reported potential side effects may include: GENERALLY WELL-TOLERATED — L-theanine is very safe and non-sedating at normal doses. Side effects are rare; mild headache is occasionally reported. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Is AlphaWave® L-Theanine (NutriScience) safe to take?

Whether AlphaWave® L-Theanine (NutriScience) is safe depends on the dose, your overall health, and any medications you take. At studied doses, reported side effects can include: GENERALLY WELL-TOLERATED — L-theanine is very safe and non-sedating at normal doses. It may also interact with certain medications. AlphaWave® L-Theanine (NutriScience) is not suitable for everyone — consult a healthcare provider before use if you are pregnant or breastfeeding, have a medical condition, or take prescription medications.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Moulin M, Crowley DC, Xiong L, et al. Safety and Efficacy of AlphaWave L-Theanine Supplementation for 28 Days in Healthy Adults. Neurol Ther. 2024;13(4):1135-1153..PubMedUsed to support: Brand-specific RCT of L-theanine for stress and relaxation.