Probiotic Supplements: Understanding CFU Counts and Strains
Probiotic labels often feature a large number followed by CFU. Here is how to read the rest of the information.
What CFU means
CFU stands for colony-forming units, a measure of the number of live microorganisms in a serving. A bigger number does not automatically mean a better product, so look at the whole label.
Strain names
A probiotic label should name the genus, species and strain, for example Lactobacillus acidophilus followed by a strain code. Different strains are different products, so the strain name is useful if you want to look up information about a specific one.
Count at the end of shelf life
Some labels state the number of organisms at the time of manufacture and others at the end of shelf life. A clear statement is helpful when you compare products.
Storage
Follow the storage instructions on the pack. Some products need to be kept in a cool place or in the fridge, while others are shelf-stable.
Other ingredients
Check for prebiotic fibres, allergens and capsule materials, especially if you follow a vegan or dairy-free diet.
Food supplements should not replace a varied diet. If you are pregnant, breastfeeding, taking medication or have a medical condition, speak to your pharmacist or doctor before starting a supplement.
