Tablets · 60 tablets · 30 servings · $0.89/serving
Natural Factors Suntheanine L-Theanine delivers a patented, pure-form L-theanine, the amino acid found naturally in green tea, to support relaxed alertness and a calm mental state without drowsiness. Suntheanine is produced via a proprietary enzymatic fermentation process that yields a pharmaceutical-grade, 99%+ pure L-theanine isomer, identical to what's found in tea leaves. This formulation is suited for adults seeking to support focus and stress management as part of a daily wellness routine.
Why It's Worth Considering: The Suntheanine trademark represents one of the most rigorously studied forms of L-theanine, with the specific isomer and purity level used in published clinical research on relaxation and cognitive support.
L-theanine produces measurable alpha brain wave increases within 30-40 minutes of ingestion. Most people notice a sense of calm focus within 30-60 minutes. Unlike prescription anti-anxiety medications, it works quickly without sedation, cognitive impairment, or dependence.
Yes — this is the most well-studied nootropic combination. L-theanine (200mg) smooths caffeine's stimulatory effects, reducing jitteriness and anxiety while preserving alertness and focus. Studies show the combination improves attention and task-switching better than either alone. The ideal ratio is 2:1 theanine to caffeine.
Yes. L-theanine is one of the safest supplements available — it's the primary amino acid in green tea. Doses up to 400mg/day have shown no adverse effects in clinical studies. No tolerance builds up, no withdrawal, and no dependence. It can be taken daily for years without concern.
L-theanine improves sleep QUALITY without causing drowsiness — it promotes relaxation and reduces racing thoughts, making it easier to fall asleep. It's particularly effective for people whose insomnia is driven by anxiety or an overactive mind. Take 200-400mg about 1 hour before bed. Unlike melatonin, it won't make you groggy if you need to wake up.
Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Natural Factors - Suntheanine L-Theanine. This data will be available soon.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
