Comparison

Vitamin D3 Complex and Calcitron 2:1 Ratio Magnesium Calcium

Vitamin D3 Complex (Indiana Botanic Gardens) lists 3 distinct ingredients and Calcitron 2:1 Ratio Magnesium Calcium (Nature's Plus) 4 (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 0.83.

Amount per serving (and % of the Daily Value)
IngredientVitamin D3 ComplexCalcitron 2:1 Ratio Magnesium Calcium
Vitamin D50 mcg (250%)1.25 mcg (6%)
Magnesium100 mg (24%)800 mg (190%)
Horsetail400 mg400 mg
Calcium400 mg (31%)

Amounts are per serving as DSLD gives them: Vitamin D3 Complex, 1 capsule; Calcitron 2:1 Ratio Magnesium Calcium, 2 tablets. Current labels entered December 2017 and October 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own