The “20% = high protein” rule, decoded. FSSAI (2018 Advertising & Claims rules) lets a solid food print HIGH PROTEIN when 100 g covers ≥20% of the 54 g/day RDA, i.e. just 10.8 g per 100 g (liquids 5.4 g/100 ml). It’s a floor, not a verdict: Horlicks clears it at 11% protein-by-calories; so does Amul buttermilk at 62%. Same badge, very different product, which is the whole reason for a grade.
Why “grams” isn’t enough. A label’s grams are raw protein; usable protein is grams × PDCAAS (amino-acid quality). Whey is 1.00; dal ~0.70; collagen 0.00, a 90 g collagen scoop is ~0 g your muscles can build with. DENSITY and VALUE here run on usable protein, so quality flows through the whole grade.
“Sugar-free” isn’t always clean. The Clean score docks points for the tricks that dodge the sugar line, sucralose (a 2023 study flagged a trace impurity as genotoxic in cells), maltitol (laxative past ~20 g), maltodextrin (GI higher than sugar), and aspartame (WHO “possibly carcinogenic”, ~14 colas/day to cross the limit). Tap any row for the fine print.
Buyer beware (India). A 2024 study of 36 Indian protein supplements (Citizens Protein Project) found ~70% mislabeled on protein, 14% with fungal toxins, and lead in 75%. The ICMR’s 2024 guidelines say: get protein from food first. Macros here are label/brand-listed, checked Jun 2026; ~ marks an estimated side-macro; we grade the label, not biology, and this isn’t medical advice.