Comparison

Milk Thistle and Milk Thistle 80% Silybin 30%

Milk Thistle (Life Extension) lists 3 distinct ingredients and Milk Thistle 80% Silybin 30% (PureBulk.com) 2 (rows of one ingredient counted once); 2 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 0.78.

Amount per serving (and % of the Daily Value)
IngredientMilk ThistleMilk Thistle 80% Silybin 30%
Silymarin600 mg212 mg
Silybin285 mg78 mg
Milk Thistle750 mg

Amounts are per serving as DSLD gives them: Milk Thistle, 1 vegetarian capsule; Milk Thistle 80% Silybin 30%, 250 mg. Current labels entered August 2020 and June 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own