We pick one ingredient every weekday morning and tell you what the research actually says. The dose that matters. The form that absorbs. Whether it is worth your money.
The whole edition belongs to a single compound.
Long enough to follow the mechanism and land on a verdict.
Monday through Friday, in time to change what you swallow.
The brand says one thing and the person with the podcast says another. The research sits in journals nobody translates for the person standing in the aisle with ninety seconds to decide.
This one ran on magnesium oxide, the cheapest salt in the aisle. The number on the front was accurate, and the four letters underneath it decided everything.
It opens on something you already own.
What the compound does once it is inside you, in plain language.
The label read against the research, with the deciding row flagged.
A grade with the reasoning attached, and no link to click.
The 400 milligrams printed on the front is honest. It is the four letters in brackets underneath it that decide what you actually get.
| Form | Reaches the blood | What to know |
|---|---|---|
| Oxide | About 4% | The default in cheap bottles. Most of the dose keeps going and pulls water with it. |
| Citrate | Several times more | The soluble salt with the most human comparison data behind it. Cheap enough. |
| Glycinate | Better than oxide | Gentle on the gut. The head to head data is thinner than the marketing suggests. |
Human absorption work puts oxide at the bottom of the aisle, with the soluble salts measurably higher. Magnesium is worth taking, and this is the version least likely to reach you.
The lens is assigned before the topic, so the rotation never drifts into the same review with a different name on it.
The amino acid in collagen your body already makes, and what that means for the powder.
Why a proprietary blend lets a brand hide the real dose of every ingredient inside it.
Magnesium oxide against magnesium glycinate: one mineral, two entirely different results.
You did not pick them off a shelf, and almost none of them get the scrutiny a supplement gets.
The rating measures the research behind the ingredient’s main claim.
Multiple large human trials, meta-analyses or systematic reviews, and they agree with each other.
Solid human trial evidence, with some variation in effect size or in who was studied.
Small human pilots, observational work, or mechanism with early human support behind it.
Mostly cells, animals or theory. Interesting, and not yet shown to do anything in people.
Nothing is sponsored, and no product is named as a recommendation. The subject is always the compound itself.
No review ends with a link. There is no shop behind this newsletter.
Rankings compress the thing that matters. One compound gets the whole edition, or it waits its turn.
If the search cannot confirm a figure, the edition prints an honest descriptor instead of a confident number.
There is a cabinet with things in it you started at different times for different reasons. You could not say with confidence which ones are doing anything.
Every recommendation you meet is attached to a product, a protocol, a personality or an ad. Nobody picks one thing at a time and goes to the research.
You read labels. You do not always know what the terms mean, and nobody in the chain is paid to explain them to you.
Weekday mornings, about five minutes, and nothing to sell you at the end of it.