Comparison

B-Complex and Cal-Mag With B-Complex & Vitamin C

B-Complex (Roex) lists 18 distinct ingredients and Cal-Mag With B-Complex & Vitamin C (NOW) 14 (rows of one ingredient counted once); 13 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 0.62.

Amount per serving (and % of the Daily Value)
IngredientB-ComplexCal-Mag With B-Complex & Vitamin C
Calcium50 mg (4%)1,000 mg (77%)
Vitamin B6100 mg (5882%)5 mg (294%)
Magnesium50 mg (12%)500 mg (119%)
Vitamin B12300 mcg (12500%)20 mcg (833%)
Niacin100 mg (625%)40 mg (250%)
Folate800 mcg800 mcg
Pantothenic Acid (Vitamin B5)50 mg (1000%)20 mg (400%)
Riboflavin50 mg (3846%)5 mg (385%)
Thiamin50 mg (4167%)10 mg (833%)
Biotin300 mcg (1000%)300 mcg (1000%)
Cholinenot disclosed20 mg (4%)
Inositolnot disclosed20 mg
PABAnot disclosed10 mg
Vitamin C120 mg (133%)
Vitamin A5,000 IU
Alpha Lipoic Acidnot disclosed
Bromelainnot disclosed
Argininenot disclosed
Betaine Hydrochloridenot disclosed

Amounts are per serving as DSLD gives them: B-Complex, 1 tablet; Cal-Mag With B-Complex & Vitamin C, 2 tablets. Current labels entered January 2020 and May 2015. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own