How many probiotics survive in Yogurt?

Probiotics are foods or supplements that contain live microorganisms intended to maintain or improve useful bacteria (normal microflora) in the body. Yogurt is a probiotic whereas Prebiotics are foods (typically high-fiber foods) that act as food for probiotics.

However, when we eat yogurt not all useful bacteria reach the intestine.
The concentration of lactobacillus in yogurt can vary depending on the brand and type of yogurt, but it is typically in the range of 100 million to 1 billion colony-forming units (CFUs) per gram. This means that a single gram of yogurt could contain up to 1 billion live lactobacillus bacteria.

The amount of lactobacillus that makes it to the small intestine is also variable, but it is estimated that about 10% of the lactobacillus in yogurt survives the journey through the stomach and small intestine. This is because the stomach acid and digestive enzymes can kill many of the bacteria. However, the lactobacillus that do survive can provide a number of health benefits, such as:

* Improving gut health
* Boosting the immune system
* Reducing the risk of allergies and infections
* Helping to manage lactose intolerance
* Preventing diarrhea
* Reducing the risk of colon cancer

Some yogurts are specifically designed to contain high levels of lactobacillus, such as probiotic yogurts.
In general, organic yogurt or yogurt made with fresh and whole milk is preferred over low fat yogurt. This is because the industrial process of lowering milk's fat may also affect the growth of the live probiotics in it.

Note that the concentration of lactobacillus in yogurt can decrease over time, so it is best to eat yogurt soon after opening it. You should also store yogurt in the refrigerator to help preserve the live bacteria.