Comparison

Histamine & Immune and Xtra-Cell Immunity

Histamine & Immune (Heart & Soil) lists 5 distinct ingredients and Xtra-Cell Immunity (Douglas Laboratories) 3 (rows of one ingredient counted once); 3 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 0.55.

Amount per serving (and % of the Daily Value)
IngredientHistamine & ImmuneXtra-Cell Immunity
Liver600 mg0.06 fl. Oz.
Thymus600 mg0.19 fl. Oz.
Spleen600 mg0.06 fl. Oz.
Kidney600 mg
Lung600 mg

Amounts are per serving as DSLD gives them: Histamine & Immune, 6 capsules; Xtra-Cell Immunity, 9 ml. Current labels entered November 2022 and January 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own