Typical dose
100-400 mg daily, often taken in single or divid...
Oral
Oral safety: harmless
About this supplement
Suntheanine is a patented, highly pure form of L-theanine (γ-glutamylethylamide), an amino acid analog found naturally in green tea (Camellia sinensis). It is specifically manufactured to contain over 99% pure L-theanine isomer, distinguishing it from synthetic DL-theanine mixtures. L-theanine is structurally similar to glutamate, a major excitatory neurotransmitter, and can cross the blood-brain barrier. Its primary recognized mechanism involves modulation of brain neurotransmitters, including increasing levels of GABA, serotonin, and dopamine, while potentially reducing levels of excitatory neurotransmitters. It is widely studied for its calming and relaxing effects without causing drowsiness, and for supporting cognitive functions like attention and focus under stress.
How much to take
- Typical amount
- 100-400 mg daily, often taken in single or divided doses. For acute stress, 200 mg is commonly studied.
- Suggested range
- 100 mg to 400 mg per day
Potential benefits
Benefits linked to this supplement form:
Sleep Quality
Research strength: Moderate
RelaxationResearch strength: Strong
Focus (with Caffeine)Research strength: Strong
Stress & Anxiety ReductionResearch strength: Strong
Cognitive Support & FocusResearch strength: Strong
Sleep Quality SupportResearch strength: Moderate
Improved Focus & AttentionResearch strength: Moderate
Neuroprotection & Cognitive SupportResearch strength: Early
Things to watch for
Possible side effects linked to this form:
Health goals
Needs and goals this form may help with:
- Sleep Quality Sleep
- Falling Asleep Sleep
- Staying Asleep & Night Waking Sleep
- Circadian Rhythm & Shift Support Sleep
- Calming Bedtime Routine Sleep
- Sustained Focus & Concentration Cognition
- Memory & Recall Cognition
- Mental Energy & Brain Fog Cognition
- Cooling & Sensory Clarity (Topical) Cognition
- Calm & Nervous Tension Mental wellness
- Stress Resilience & Overwhelm Mental wellness
- Mood Stability & Outlook Mental wellness
- Cortisol & Stress Hormone Balance Mental wellness
- Aromatherapy & Relaxation Mental wellness
- Stress Management
- Sleep Support
- Cognitive Performance
- Mood Balance
Technical details â–¼
Chemical ID (CAS)
3081-61-6
Formula
C7H14N2O3
Physical properties
White crystalline powder or needles. Soluble in water, practically insoluble in ethanol and ether. Odorless with a slightly sweet taste. Melting point approximately 202-215°C (decomposes).
How it’s made
Suntheanine is produced via a patented enzymatic fermentation process. It involves the use of specific bacterial enzymes (glutaminase) to catalyze the reaction between ethylamine and L-glutamine, yielding highly pure L-theanine. This process mimics the natural biosynthesis in tea leaves but allows for industrial-scale production of a single isomer (L-form) with exceptional purity (>99%), avoiding the racemic DL-theanine produced by some chemical synthesis methods.