Version 2.0 formulas releasing soon · Single batch every time — every batch reformulated and matched to the latest scientific evidence · 166 evidence-based compounds across 30 products.Version 2.0 releasing soon · Single batch every time · 166 compounds across 30 products.
Formulas built the way I would build them for myself.
Tier 2 · human trials, fewer or smaller
Suntheanine® L-theanine
Systematic review of 13 trials (n=550, 50–900 mg): improved sleep-related outcomes; alpha-wave and attention RCTs at 50–200 mg.
7/10evidence score
Taiyolicensed form owner
200 mgstudied dose used
What the evidence shows
Systematic review of 13 trials (n=550, 50–900 mg): improved sleep-related outcomes; alpha-wave and attention RCTs at 50–200 mg.
Tier is our appraisal of the human evidence at the dose we use: Tier 1 = multiple randomized trials; Tier 2 = human trials, fewer or smaller; Tier 3 = mechanistic, traditional or early human data; Tier 4 = emerging. Ingredients below Tier 2 are included only where the safety record is long and the traditional use is specific.
Form and dose
Form used
Enzymatically produced pure L-theanine
Branded source
Taiyo
Dose per serving
200 mg
Delivery
Standard / as studied
Who should be careful
None significant. Talk with your clinician before starting if any of this applies to you.
Which NEX-GEN formulas contain Suntheanine® L-theanine?
Focus Fuel (100 mg per serving) · Sleep & Recovery (200 mg per serving). Every formula lists its full dose on the Supplement Facts panel — no proprietary blends.
What form of Suntheanine® L-theanine does NEX-GEN use and why?
Enzymatically produced pure L-theanine. We use the licensed branded form so the dose on our label matches the material studied in the trials.
What does the evidence actually show for Suntheanine® L-theanine?
Systematic review of 13 trials (n=550, 50–900 mg): improved sleep-related outcomes; alpha-wave and attention RCTs at 50–200 mg.
Who should be careful with it?
None significant. Talk with your clinician before starting if any of this applies to you.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. Nothing on this site is medical advice — it is educational "what I would do if I were you" guidance from an executive health coach. Talk with your clinician before starting any supplement, especially if you take medication, are pregnant or nursing, or have a medical condition. Last reviewed October 2026.
The protocols we cannot publish here
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