Signal State Core
One stimulant-free daily formula for the deep-work hours — four cognitive actives at disclosed, studied doses, with the evidence behind every one a single click away.
The state it's built for
You know the difference between busy and clear. Core is designed for the second one — the long, quiet block where deep work actually happens, without a caffeine spike that borrows the afternoon to pay for the morning. Stimulant-free by design: no jolt, no crash, just support for calm, sustained focus.
Who it's for
Core is a single stimulant-free formula, not a personalized blend — but different work puts weight on different actives. Here's how the same formula maps to the way your days actually run, with the evidence one click away.
The day is one or two long, demanding blocks — writing, engineering, analysis — where the goal is settled, sustained attention, and a caffeine spike-and-crash cycle works against you.
The day is context-switching under pressure — decisions, meetings, fires — where the failure mode is stress-related fatigue by mid-afternoon rather than a lack of raw focus.
The work is reading, retaining, and recalling over weeks — a semester or a research cycle — plus long same-day study blocks that reward staying settled and attentive.
Studied roles, not promised outcomes — every grade and dose is on the ingredient page.
Compare us to anything
These four questions are the checklist we teach on the buyer's guide, and the one we expect to be judged by. Hold any competitor to them — here is how Core holds up.
Core: every active is graded against published human research — trials and meta-analyses where they exist — with the citations on its ingredient page.
Core: each active is specified at its own studied dose in the working formula, checked dose-for-dose against the research it cites — we published a real label-versus-study teardown so you can see the gap this closes.
Core: no proprietary blends, ever. Every milligram will be disclosed on the label — a blend that hides its doses can't be evaluated at all.
Core: published per ingredient — interactions, side effects, and who should be careful — before anyone is asked to buy.
The same standard graded ingredients out of the formula — see everything we evaluated, including the rejects, in the Evidence Explorer.
Cognitive actives
Four stimulant-free cognitive actives, each at its own disclosed studied dose — no proprietary blend, and no passenger ingredients: every active is dosed to carry its own claim. Every card links to a full plain-English breakdown: evidence grade, studied doses, honest cautions, and what to look for on a label.
An amino acid found in tea leaves. It is studied for promoting a calm, settled kind of attention without sedation, which fits a stimulant-free focus direction.
Read the full breakdown
A choline-donating compound the body uses in cell-membrane and neurotransmitter pathways. It is studied as a focus and mental-energy ingredient.
Read the full breakdown
A traditional herb standardized for compounds called bacosides. It is studied mainly for memory and learning over sustained daily use, not for same-day effects.
Read the full breakdownAn adaptogenic herb standardized for rosavins and salidroside. Its studied benefit is narrow: reducing stress-related mental fatigue and helping sustain output during genuinely demanding stretches (night shifts, exam load) — not lifting baseline performance in a rested, unstressed adult.
Read the full breakdownFoundational base layer
Vitamin D3 and a B-complex support the foundations cognition runs on — vitamin D status and normal nervous-system function — so the actives aren't layered over a gap. We're deliberate about what these are: foundational nutrients, not cognitive actives, and they carry no cognition claim.
The nervous-system B vitamins — B6, folate, and B12 — support normal neurological and psychological function and normal nutrient metabolism. Measurable cognitive benefit is strongest where baseline status is low or homocysteine is elevated (typically older adults); it is limited in young, well-nourished people.
Read the full breakdownA foundational fat-soluble nutrient, not a same-day nootropic. There is no reliable evidence it sharpens focus in people who already have adequate levels, but low vitamin D status is common at Canadian latitudes in winter and is associated with poorer cognition — so it fits as foundational "status insurance," not a cognitive active.
Read the full breakdownEarly access
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