Comparison

Ultra Strength One-per-Day RxOmega-3 with Vitamin D3 25 mcg (1000IU) and Ultra Strength RxOmega-3 Factors

Ultra Strength One-per-Day RxOmega-3 with Vitamin D3 25 mcg (1000IU) (Natural Factors) lists 6 distinct ingredients and Ultra Strength RxOmega-3 Factors (Natural Factors) 5 (rows of one ingredient counted once); 5 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 0.89.

Amount per serving (and % of the Daily Value)
IngredientUltra Strength One-per-Day RxOmega-3 with Vitamin D3 25 mcg (1000IU)Ultra Strength RxOmega-3 Factors
Fat (unspecified)1.5 g1.5 g
Cholesterol5 mg5 mg
DHA900 mg900 mg
Omega-3900 mg900 mg
Fish Oil1.41 g1.41 g
Vitamin D25 mcg (125%)

Amounts are per serving as DSLD gives them: Ultra Strength One-per-Day RxOmega-3 with Vitamin D3 25 mcg (1000IU), 1 softgel; Ultra Strength RxOmega-3 Factors, 1 softgel. Current labels entered May 2020 and April 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own