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A quick guide for choosing the right probiotic product

how to choose the right probiotic product
5 Min read

The best probiotic strains to support health are those that have been associated with health benefits in high-quality scientific studies. For choosing the right probiotic product, we’ve put together a quick guide highlighting the key points associated with quality probiotic products.

Probiotics are not all the same

When a health benefit is associated with a particular probiotic strain in a scientific study, the benefit is specific to that particular probiotic strain only. 

For example, the health benefits associated with our Lactobacillus rhamnosus, LGG®1 (hereafter referred to by use of the trademark LGG®) strain do not extend to other Lactobacillus rhamnosus strains. This means that the Lactobacillus rhamnosus, GR-1® is not able to exert the same health benefits as LGG®, despite them both being Lactobacillus rhamnosus strains.

If a probiotic product contains more than one probiotic strain, it does not necessarily mean it will provide more of a health benefit. Specific combinations of strains (i.e., multi-strain products) must have demonstrated a health benefit in a scientific study.2

The scientific results of a probiotic strain are specifically related to the participants of that particular study (for example, if the benefit was observed in a study of adults, then the strain does not necessarily benefit a newborn baby).3

The scientific results of a probiotic strain are specifically related to the health area investigated (i.e., if a strain is associated with supporting immune health, it does not mean it is able to support gut health, oral health, etc.).


Just the right amount

Probiotic products contain millions to billions of live bacteria, each of which can form bacterial communities (i.e., colonies); thus, the number of probiotic bacteria in a product is given as Colony Forming Units (CFU).2
A higher CFU number does not mean it is a better probiotic.4
500 million to 50 billion CFU have been associated with various health benefits, how much is needed depends on the strain used and the health area.5
Read more about probiotic strains and their benefits for respiratory health, occasional loose stools, and excessive crying and fussing.

What to look for when buying probiotics

What to look for?

Bacterial strains Open Close

Ideally, a probiotic product lists the bacterial names in full, so it is possible to see if that product contains a specific strain. 

Let’s take Lactobacillus rhamnosus GG, LGG® as an example.
Lactobacillus’ is the genus, ‘rhamnosus’ is the species, ‘GG’ is the strain, and ‘LGG®’ is the trademark of this particular strain manufactured by Chr. Hansen. If the strain is not listed, it is not possible to know which area of health this probiotic product may support.

So, choose products that include the strain and not just the genus or species. This is important because different strains can support different health areas due to their unique characteristics, even when they come from the same genus and species.
Read more in what are probiotics?

Claims & recommended usage Open Close

This tells about how to use the product and the health area the product may support. Any claims should be scientifically supported.

Total active cell count (CFU) Open Close

Look for the number of live bacteria (CFU) in the product (sometimes written as ‘live cultures’). Avoid products stating the CFU ‘at time of manufacture’ - this labeling does not account for the decline in CFU during storage. The CFU listed is usually a total count, although, in multi-strain products, the count for each strain is preferred, in this way it is possible to ensure the recommended amount of each particular strain. The CFU listed on the product label should equal the amount associated with the documented health benefits.

The number of bacteria in a probiotic product decreases with time

Probiotics are live microorganisms and they must be alive when consumed for them to function appropriately. 
The number of live bacteria in a probiotic product will decrease between manufacturing and purchasing. On a probiotic label, pay attention to the CFU level at the ‘end of shelf life’ (a product's potential expiration). This number should be within the same range as was used in the scientific study that demonstrated the strain’s health benefit.2
The amount of probiotic (CFU) present on the ‘manufacturing date’ is not as important as the amount present at the 'end of shelf life'.2
Not all probiotics need to be refrigerated to maintain their functionality; actually, most can be kept at room temperature.4


Safe to consume confidently

People who are generally well may consume probiotics as part of their daily diet.4
The probiotic strain should be approved for human consumption by a recognized regulatory or food safety authority:

  • GRAS (Generally Recognized As Safe) notified to the FDA in the US6
  • QPS (Qualified Presumption of Safety) granted by EFSA in Europe7

Consult a health care professional to find out more about probiotics to support health.

LGG® is a registered trademark of Chr. Hansen A/S.

The article is provided for informational purposes regarding probiotics and is not meant to suggest that any substance referenced in the article is intended to diagnose, cure, mitigate, treat, or prevent any disease.

References Open Close

  1. Hojsak I, et al. Pediatrics. 2010;125(5):e1171-7. (PubMed)
  2. Jackson SA, et alFrontiers in Microbiology. 2019;10:739. (PubMed)
  3. McFarland LV, et al. Front Med (Lausanne). 2018;5:124-. (PubMed)
  4. World Gastroenterology Organisation. World Gastroenterology Organisation Global Guidelines - Probiotics and prebiotics. 2017.
  5. Hao Q, et alCochrane Database Syst Rev. 2011(9):Cd006895. (PubMed)
  6. Food and Drug Administration. GRAS Notice Inventory > Agency Response Letter. GRAS Notice No GRN 000049. 2002.
  7. EFSA Panel on Biological Hazards (BIOHAZ). EFSA Journal. 2015;13:4331.
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What are


Learn more about what probiotics are and how they are associated with health benefits

What to

look for

See key tips on how to choose a high-quality probiotic product


Read more about some of the world’s most documented probiotic strains and their diverse health benefits

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