Comparison

Pro-B11 and Ultimate Probiotic Critical Care 55 Billion

Pro-B11 (IF Intestinal Fortitude) lists 11 distinct ingredients and Ultimate Probiotic Critical Care 55 Billion (Natural Factors) 9 (rows of one ingredient counted once); 9 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 0.81.

Amount per serving (and % of the Daily Value)
IngredientPro-B11Ultimate Probiotic Critical Care 55 Billion
Lactobacillus acidophilusnot disclosednot disclosed
Lactobacillus rhamnosusnot disclosednot disclosed
Bifidobacterium animalis lactisnot disclosednot disclosed
Lactobacillus plantarumnot disclosednot disclosed
Bifidobacterium bifidumnot disclosednot disclosed
Bifidobacterium longumnot disclosednot disclosed
Lactobacillus paracaseinot disclosednot disclosed
Bifidobacterium brevenot disclosednot disclosed
Bifidobacterium infantisnot disclosednot disclosed
Lactobacillus caseinot disclosed
Streptococcus Thermophilusnot disclosed

Amounts are per serving as DSLD gives them: Pro-B11, 1 capsule; Ultimate Probiotic Critical Care 55 Billion, 1 vegetarian capsule. Current labels entered July 2020 and May 2020. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own