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What Are The Most Common Probiotics?


By now you’ve heard how good gut bacteria are essential for a healthy digestive and immune system.

There are up to 80 your immune system resting in your gut and having the right bacteria balance is vital to your health.

This can mean the difference between a full of energy or full of discomfort.

That is one of the reasons that people are consuming probiotics.

Common species of probiotics

The most commonly consumed probiotics are strains of two main species. These species are also the most studied type of probiotics:

Bifidobacteria - This species of bacteria is commonly used in foods and supplements. They’re there to:






  • support the immune system
  • limit the growth of harmful bacteria in the intestine
  • help in breaking down lactose into nutrients the body can use

Lactobacillus - This species of bacteria produces lactase, the enzyme that breaks down lactose, or milk sugar. These bacteria also produce lactic acid.

Lactic acid helps control the population of bad bacteria. It also serves as muscle fuel and increases the body’s absorption of minerals. 

Lactobacillus bacteria are found naturally in the:

  • mouth
  • small intestine
  • vagina

Common strains of probiotics

Probiotic strains are genetic subtypes of species.

 Each probiotic strain has a different effect in the body. You will see the probiotic strain names on food or supplement labels, combined with the species name.

Here are six common strains of probiotics that you’ll find on food and supplement labels.

  1. animalis - This strain is an ingredient in Dannon yogurt’s Activia product. It’s helpful in aiding digestion and fighting food-borne bacteria. It’s also thought to boost your immune system.
  2. breve - This strain lives in your digestive tract and in the vagina. In both places, it fights off infection-causing bacteria, or yeast. It helps your body absorb nutrients by fermenting sugars. It also breaks down plant fiber to make it digestible.
  3. lactis - This is derived from raw milk. It’s an ingredient in Nestle’s probiotic infant formula, called Good Start Natural Cultures. It also serves as a starter for: buttermilk, cheese, or other cheese.
  4. longum - This strain lives in your gastrointestinal tract. It helps break down carbohydrates and also can be an antioxidant.
  5. acidophilus - This strain is found in the small intestine and in the vagina. It helps digestion and may help fight off vaginal bacteria. You can find it in yogurt and fermented soy products, such as miso.
  6. reuteri - This strain is found in the intestine and mouth. One study showed that it decreased the oral bacteria that cause tooth decay. It’s also thought to help the digestive system.