Comparison

Vitamin D3 1000 IU and D3 25 mcg (1000 IU)

Vitamin D3 1000 IU (Good 'N Natural) lists 2 distinct ingredients and D3 25 mcg (1000 IU) (Nature Made) 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 1.00: the same ingredients, at the amounts in the table below.

Amount per serving (and % of the Daily Value)
IngredientVitamin D3 1000 IUD3 25 mcg (1000 IU)
Calcium117 mg (9%)92 mg (7%)
Vitamin D25 mcg (125%)25 mcg (125%)

Amounts are per serving as DSLD gives them: Vitamin D3 1000 IU, 1 tablet; D3 25 mcg (1000 IU), 1 tablet. Current labels entered May 2016 and November 2020. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own