ProtCalc

The nitrogen-to-protein factor is a guess from 1931 — for pea, rice and beef trim it overstates protein by 10-15%, and the fix is public sequence data, arithmetic, and a script.

The tool →

Two-mode alternative-NIP calculator: formulation mode (does my label match my recipe?) and label mode (bracket-aware ingredient statements, category priors, declared-% hard constraints).

Demo report →

Compare 60 commodities · explore blend chemistry and NPN · quality tiers (Tier C compositional / Tier B matched-coefficient) with the honest flags.

Pipeline →

Data sources (UniProt · USDA FDC · AFCD) → build → engine → surfaces, with the documentation band.

60commodities
187verified proteins
47scored for quality (Tier C/B)
100%share sources documented

Sequence-derived k is for process control, spec setting and research reporting — the declared factor on a label is usually prescribed by regulation, and neither Tier C nor Tier B of the quality score is a measured DIAAS. Every protein traces to a verified UniProt sequence, every share to a documented source, every coefficient to a citation.