ABOUT THE STANDARD
Built by reading the papers
other brands only cite.
Dayspan makes supplements organised around the span of a day — sleep first, because it decides the quality of everything after it, then energy for mornings and focus for the middle. The rule is the same in every product: every ingredient named, every dose printed, every claim stated at the strength the evidence actually supports.
The first Dayspan Sleep formula work began in 2017 with magnesium bisglycinate, passionflower, and lemon balm—not glycine. The current formula is judged by the evidence and verification available now, not by how long the idea has existed.
Inspect the public work ledger →
THE WAY WE WORK
Trust is built through traceable decisions.
We choose the use case, set the formula, challenge the evidence, and publish the record before we ask anyone to buy. The work ledger shows that process in public.
See how a decision gets made →Why we started here
The sleep aisle runs on borrowed credibility. A compound gets a mechanism story, the story gets repeated until it sounds like a finding, and nobody opens the paper. We opened the papers.
What we found was worse than vagueness. A widely-used ingredient whose headline mechanism is contradicted by the primary electrophysiology. A published sleep trial reporting a sleep efficiency that is physiologically impossible, quoted unchallenged in a peer-reviewed review. A search tool confidently citing a trial that does not exist.
So the product became the argument: if we can show our work down to the funding source of every study, the formula doesn’t need adjectives.
What we promise
- Every dose printed. No proprietary blends, ever. A blend is a way of not telling you the dose.
- The lab report first. Every production batch’s third-party certificate of analysis is published on this site before the batch is sold — published, not available on request.
- Funding disclosed, including ours. Several of our ingredients rest on manufacturer-funded trials. We say so on the ingredient page, and we hold our own citations to the standard we’d apply to a competitor.
- The limits, out loud. Each ingredient was studied on its own; the combination has never been tested as a combination. We won’t pretend the jar ran a trial.
- Reviews only when earned. We have zero customers, so we have zero testimonials. When they exist they’ll be verified buyers, and the critical ones stay up.
THE ARC
One system, three parts of a day.
01 · GLYCINE
In development, prelaunch
One five-active formula with glycine at its center. Explore its broader biological roles and ingredient research; the final panel and batch verification come before sale.
02 · ENERGY
Researching
Morning capacity without turning the day into a stimulant arms race, held to the same evidence-grading and reachable-dose rules.
03 · FOCUS
Researching
A measured midday formula for calm attention, developed only after the Sleep launch work is complete.
Start with the part that costs us money.
Before you buy any sleep supplement — ours included — there are four behaviours with better evidence than anything in a jar.
Read those first →