Comparison

NF Formulas Thymactiv and Xtra-Cell Thymus

NF Formulas Thymactiv (Integrative Therapeutics) lists 2 distinct ingredients and Xtra-Cell Thymus (Douglas Laboratories) 1 (rows of one ingredient counted once); 1 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)
IngredientNF Formulas ThymactivXtra-Cell Thymus
Thymus0.01 mg0.3 fl. Oz.
Echinacea angustifolia0.1 mg

Amounts are per serving as DSLD gives them: NF Formulas Thymactiv, 0.2 ml; Xtra-Cell Thymus, 0.3 fl. oz.. Current labels entered July 2013 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