Comparisons ranked by the evidence, not by the margin.
Every comparison starts from a concrete problem and works back to the interventions whose effect is measured in humans. We state the trial dose, the cost per day, and who must not take the product. When the data is weak, it is written at the top of the page.
Every comparison, by need
Sleeping better: what actually works, in order
Magnesium, glycine, melatonin, theanine: sleep supplements ranked by strength of evidence — after the three free levers that matter more.
Building muscle at home: what actually works, without buying anything
Gaining muscle at home with no equipment: the three variables that matter, a two-session programme, and the supplements that are genuinely documented.
Persistent fatigue: check before you buy
Iron deficiency, vitamin D, sleep apnoea, thyroid, sleep debt: what to measure before taking any supplement at all.
Bloating and transit: where to actually start
Digestion comparison: psyllium, probiotics, fibre, hydration. What the trials say, and what to check before buying.
What to measure before buying any supplement at all
Ferritin, vitamin D, B12, lipid panel: the four tests that decide whether a supplement helps you or not. What to ask for, when, and how to read the result.
The whole catalogue, filtered by need
The ranking takes your profile into account if you have one. Spin the products: every object is modelled in 3D, not photographed by a brand.
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effect on the ranking or on the level of evidence shown.
* Budget bands are indicative and change often. Only the price shown on
Amazon at the moment you buy counts: check it before you order.
Start from the symptom
Not sure what to look for? Describe what is bothering you in the search console on the home page, in plain words. The engine turns the sentence into needs.
What we get asked most
Short answers, sourced where they can be, honest where the data is missing.