4 labels with a matching filed formulation

Shared fields and reproducible fingerprint

4 filed other-ingredient entries, 1 units per serving and 170 mg elemental magnesium per unit after rounding define this group, calculated 2026-09-13 from the 2026-08-10 records.

The hash input is the JSON array [sorted lowercase ingredient list, shell classification or null, units per serving, rounded mg per unit]. Leading and trailing spaces are removed and repeated spaces collapse to one. Ingredient synonyms remain distinct here. Rounding uses 5 × round(elemental mg per serving ÷ units per serving ÷ 5), with halfway values rounded upward.

At least 4 distinct substance entries and at least 2 distinct brand identifiers are required, calculated 2026-09-13. Labels with missing discrete-unit counts, ranged serving-unit counts or unresolved elemental amounts are excluded from fingerprinting. A shared null shell field means shared missing information; it does not establish identical physical shells.

Brand-name variants are consolidated for the 2-brand threshold: Bronson Laboratories with Bronson, Chapter One by Zahler with Chapter One, and vitafusion GOODNESS with vitafusion. Original filed brand names remain visible in the label table.

Price spread within each salt

1 published price observations with a resolved salt are available for this cluster as of 2026-09-13; 0 salt groups have at least 2 observations for a price-spread calculation.

EC100 = item price ÷ (elemental mg per serving × servings per container ÷ 100). The ratio is maximum EC100 ÷ minimum EC100 within the same salt. Different salts retain separate rows, even when their excipient fingerprints match. Observation dates and provisional match status remain visible in the label table below.

Labels sharing these filed fields

4 labels from 2 brands share this fingerprint as of 2026-09-13; the table retains each original ingredient list, serving statement and dated retail observation in brand order.