Chapter 01 — Why Capsi exists
We started Capsi because the daily vitamin aisle hadn’t been honest with anyone in a long time.
A multivitamin is supposed to be the simplest thing in the medicine cabinet. In practice, it’s the most cynical: cheap forms, floor doses, twenty ingredients on the label and trace amounts of any of them in the capsule. We weren’t interested in making a slightly nicer version of that. We wanted the opposite of that.
A short note on dosage
The studied dose for magnesium glycinate sits around 400 mg. Most pharmacy multis carry 50 mg of magnesium oxide, a form your body barely absorbs, and call it a day. The math is not subtle. A daily vitamin that does nothing is not a cheaper vitamin — it is a more expensive one, paid for in mornings.
Capsi is built the other way around. We start from the human trial, work backwards to the form and the dose that produced the result, and then tune that dose to the person taking it. A 28-year-old running on six hours of sleep does not need the same pack as a 42-year-old training for a marathon. So we don’t pretend they do.
What we won’t do
- Proprietary blends. If it’s in your capsule, the dose is on the label.
- Filler ingredients added to look comprehensive on a label.
- Founder selfies in lab coats.
- Claims we can’t back to a peer-reviewed paper.
Where we are
Capsi is a small team based in Brooklyn and Lisbon. Every batch is third-party tested by Eurofins; the certificate of analysis lives on the product page, not behind a contact form. If something in this paragraph stops being true, this paragraph will be the first thing we change.