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Field guides

How to read a label like an auditor.

Plain-language guides to the arithmetic behind the ratings — the panel, the doses, the blends, and the price per gram that the shelf tag hides.

Field guide Clinical Doses: What the Research Actually Used The dose thresholds behind our ratings, with citations; why citrulline malate and L-citrulline are not interchangeable, and why exceeding a dose is not a bonus. 5 min · updated 2026-10-18 Field guide Cost Per Gram of Protein: The Only Price That Matters The arithmetic behind cost-per-gram-of-protein comparisons, worked with a real example, and why shelf price and count packaging both mislead on their own. 4 min · updated 2026-08-21 Field guide How to Read a Supplement Facts Panel Serving size versus servings per container, why "per serving" pricing hides the real cost, what %DV means, and what a proprietary blend legally hides. 5 min · updated 2026-10-05 Field guide Proprietary Blends — What They Hide and Why It Matters How proprietary blends work, why a 750 mg blend cannot hold a clinical dose of its headline ingredient, and why a blend is not automatically bad. 5 min · updated 2026-10-18 Field guide Reading a Fish Oil Label: EPA + DHA, Not Oil Weight Why a 1,000 mg fish oil softgel is not 1,000 mg of EPA+DHA, the 250 mg reference we score against, and how cost per dosed serving is worked out. 4 min · updated 2026-10-18 Field guide Reading a Vitamin D Label: IU, Micrograms and the 600 IU Reference How vitamin D3 converts between IU and micrograms, the 600 IU reference this site audits against, and how cost per dosed serving is worked out. 4 min · updated 2026-10-18 Field guide What Amino Spiking Is, and How to Spot It How nitrogen-based protein tests can be gamed with free-form amino acids, which ingredient-list signals to check, and what certification does not prove. 4 min · updated 2026-10-04