Calculating Probiotic CFU from Dosage and Concentration
Question
How to calculate the CFU count for probiotic ingredients based on their concentration per gram and the dosage in milligrams? Specifically, is 60mg of 6-Strains Probiotic (10 billion CFU/g) equal to 6 billion CFU, and is 90mg of Bacillus Coagulans (100 billion CFU/g) equal to 10 billion CFU?
Answer
Probiotic CFU Calculation
Let's calculate the amount of bacteria (CFU) based on the concentration per gram and the dosage in milligrams.
6-Strains Probiotic (10 billion CFU/g)
- Concentration: 10 billion CFU per gram (10,000,000,000 CFU/g)
- Dosage: 60 mg = 0.06 g
- Calculation: 10,000,000,000 CFU/g * 0.06 g = 600,000,000 CFU
- This is equal to 0.6 billion CFU, not 6 billion CFU.
Bacillus Coagulans (100 billion/g)
- Concentration: 100 billion CFU per gram (100,000,000,000 CFU/g)
- Dosage: 90 mg = 0.09 g
- Calculation: 100,000,000,000 CFU/g * 0.09 g = 9,000,000,000 CFU
- This is equal to 9 billion CFU, not 10 billion CFU.
So, to summarize:
- 60 mg of 6-Strains Probiotic (10 billion CFU/g) contains 0.6 billion CFU.
- 90 mg of Bacillus Coagulans (100 billion/g) contains 9 billion CFU.
Updated Review: May 2026
This section was added after reviewing the original answer against current product availability and formulation knowledge at the stated point in time.
Update 2026-05-24: The original CFU calculations remain correct: 60 mg of 6-Strains Probiotic at 10 billion CFU/g gives about 0.6 billion CFU, and 90 mg of Bacillus Coagulans at 100 billion CFU/g gives about 9 billion CFU. For an exact label or production claim, calculate from the current lot COA if its CFU/g differs from the catalog name. Also note that these are theoretical input CFU values at weighing; the viable CFU in the finished product can be lower depending on storage and processing. 6-Strains Probiotic should be kept frozen or at the lowest practical temperature, protected from air/light, and not used in heat-process products. Bacillus Coagulans is more heat- and acid-tolerant, but should still be handled according to the lot COA and protected from air/light.