Comparison

Ultra Probiotic for Seniors and ProBiotic-4

Ultra Probiotic for Seniors (Swanson) lists 6 distinct ingredients and ProBiotic-4 (Swanson Probiotics) 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 0.84.

Amount per serving (and % of the Daily Value)
IngredientUltra Probiotic for SeniorsProBiotic-4
Lactobacillus acidophilusnot disclosednot disclosed
Bifidobacterium animalis lactisnot disclosednot disclosed
Bifidobacterium bifidumnot disclosednot disclosed
Lactobacillus caseinot disclosednot disclosed
Fructo-Oligosaccharides750 mg125 mg
Lactobacillus rhamnosusnot disclosed

Amounts are per serving as DSLD gives them: Ultra Probiotic for Seniors, 2 veggie capsules; ProBiotic-4, 1 vegetarian capsule. Current labels entered May 2019 and April 2018. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own