Read the evidence.Then decide.
Start with an ingredient, a health goal or a product label. Understand what's inside, explore the evidence and compare your options.
Will magnesium help me sleep?
Some trials report improvements, but the findings are mixed. Who took part, what was measured and the size of the change all matter.
Read the breakdown Label explorer
Read the label before the claim.
Compare the declared active ingredient, extra ingredients, serving size and linked source documents.
Compare labelsStart with a health goal
Pick what you want to change, then see which nutrients were studied for it.
Guides and breakdowns
One question at a time: the claim, the study and its limitations.
Guide · SleepWill magnesium help me sleep?
Some trials report improvements, but the findings are mixed.
Guide · HeadachesCould magnesium help prevent migraines?
Before any answer, look at who took part and which outcomes each trial measured.
Guide · PeptidesCan peptides get you back to training sooner?
A closer look at BPC-157, TB-500 and the human evidence behind peptide injury-recovery claims.
Systematic review · 2026Magnesium & sleep: the wider evidence
Twelve sleep trials. Explore why mixed findings limit confidence in a single answer.
Randomised trial · 2025Bisglycinate in adults reporting poor sleep
A four-week placebo-controlled trial. Read the measured result and its limitations.
Magnesium · FormsCompare magnesium forms
The forms you'll see on labels, side by side.
Magnesium · SafetyMagnesium safety
Safety questions deserve their own explanation, apart from benefits.
Magnesium starts on your plate.
Before exploring a supplement, get to know the food sources. Compare a familiar portion, then follow the full nutrient guide.
Meet magnesium
Get to know a nutrient.
Browse all nutrients
One nutrient. Different questions.
Effect size and certainty of evidence are different things. We keep them apart, never one score.
Could magnesium help me sleep better?
Some trials report improvements, but the findings are mixed. Who took part, what was measured and the size of the change all matter.
What to look at
- 01Who took part
- 02What was measured
- 03The size of the change
Could magnesium help prevent migraines?
Before any answer, look at who took part and which outcomes each trial measured.
What to look at
- 01Who took part
- 02Which outcomes were measured
Muscle cramps: who was studied?
Older adults, pregnancy and exercise are different contexts. See where the evidence applies.
Different contexts
- 01Older adults
- 02Pregnancy
- 03Exercise
New on the research desk. The latest additions.
Explore the researchMagnesium & sleep: the wider evidence
Twelve sleep trials. Explore why mixed findings limit confidence in a single answer.
Bisglycinate in adults reporting poor sleep
A four-week placebo-controlled trial. Read the measured result and its limitations.
Muscle cramps: who was actually studied?
Older adults, pregnancy and exercise are different contexts. See where the evidence applies.
From ingredient to label. Compare what's in the bottle.
Explore products
A matching number isn't the whole label.
Compare the declared active ingredient, extra ingredients, serving size and linked source documents.
Compare labelsAn ingredient being in a product does not prove the product works.Two more desks. Peptides and health effects.
One word. Very different kinds of evidence.
Explore individual compounds, what they are being studied for and what the evidence can tell us.
- Can peptides get you back to training sooner?Guide · BPC-157, TB-500 and the human evidence
- Acetyl octapeptide-3Peptide profile
- AbaloparatidePeptide profile
Clear skin. An outcome, not a promise.
Start from a measured effect and see which nutrients were assessed for it, and how sure the evidence is.
- Clear skinWhich nutrients were assessed for it?
- Hair & skinHealth goal
- ZincRoles and assessed health effects
Our reading rule. The claim. The study. The limitations.
Biological roles, measured benefits and safety questions deserve their own explanation.
How the desk works