L-Theanine
- Studied for
- Calm focus · Taking the edge off caffeine
- Studied dose
- 50–250 mg per serving across the trials cited here (Nobre 50 mg; Haskell 250 mg), most commonly 100–200 mg.
The Clean Focus Stack Guide
A stimulant-free focus stack, explained honestly.
This is the guide waitlist members get on signup: what a clean, stimulant-free cognitive stack actually looks like, the evidence behind each active, and how to tell a transparent formula from a proprietary blend.
Please note
Educational content, not medical advice. Signal State Core is a pre-launch concept. Doses and claims here describe the working v1 direction and are subject to manufacturing and regulatory review. Not intended to diagnose, treat, cure, or prevent any disease.
Start here
How to evaluate any focus stack, not just ours.
Before looking at a single ingredient, four questions separate a credible stack from a hype one.
Is there human evidence, or only lab and animal data?
Cell studies and rodent data are a starting point, not proof of an effect in people.
Does the label dose match the studied dose?
An ingredient can be well-studied and still underdosed on a label. The number on the bottle has to match the number in the research.
Is every dose disclosed, or hidden in a proprietary blend?
A blend that hides milligrams per ingredient can't be evaluated against the evidence at all.
What are the honest cautions and interactions?
A credible ingredient page tells you who should avoid it, not just who it's for.
The actives
Four stimulant-free cognitive actives, at a glance.
The working v1 direction for Signal State Core, each disclosed at its own studied dose, no proprietary blend. Grades are our own conservative reading of the human research, not a promise of effect.
Citicoline
- Studied for
- Focus · Mental energy
- Studied dose
- 250–500 mg daily in the branded-form trials; other trials used single 500–1000 mg doses in healthy volunteers, and 1–2 g daily in an older-adult memory trial.
Bacopa Monnieri
- Studied for
- Memory support · Learning over weeks
- Studied dose
- 300–600 mg daily of a standardized extract (commonly ~50% bacosides).
Rhodiola Rosea
- Studied for
- Stress-related fatigue under sustained pressure (night shifts, exam-type load) · Sustained output when already under stress or fatigue
- Studied dose
- 100–170 mg daily of the SHR-5 standardized extract in the trials cited here; the wider literature spans roughly 100–600 mg daily.
The foundation
Two foundational nutrients, not cognitive actives.
Included for their own well-established roles, not as focus ingredients. They don't carry a cognition claim.
B-Complex (B6, B9, B12)
- Studied for
- Foundational neurological and metabolic support · Older adults or low dietary B intake
- Studied dose
- Studied ranges: B6 ~10–20 mg/day (keep low: neuropathy risk), folate 400–800 mcg DFE/day, B12 5–500 mcg/day.
Vitamin D3
- Studied for
- Foundational nutritional support · Correcting or preventing low vitamin D status
- Studied dose
- 1,000–2,000 IU (25–50 mcg) daily for maintenance; up to the 4,000 IU (100 mcg) adult upper limit under guidance. Canadian non-prescription monograph routes cap lower; see label tips.
Stacking
A few practical, evidence-grounded stacking notes.
General patterns worth knowing when comparing any stimulant-free focus stack, not dosing instructions.
- L-Theanine and citicoline are commonly paired in the research as a calm-focus combination.
- Bacopa Monnieri and Rhodiola Rosea are cumulative: benefits are studied over weeks, not a single dose.
- Stacking more than one cholinergic ingredient (citicoline, phosphatidylserine) without a clear rationale adds cost and side-effect risk without added benefit.
- An activating adaptogen (Rhodiola) and a calming one (ashwagandha) work in different directions. Pick for your actual need, not both by default.
Less noise. More signal.
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Pre-launch concept site. Product, formula, claims, certifications, and regulatory language are subject to expert review before public launch. Content on this site is educational and is not medical advice. No product described here is a licensed natural health product. No Natural Product Number (NPN) has been issued by Health Canada. Consult a healthcare practitioner before starting any supplement. 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.