Food Blog - Best Food Blogs - Gourmet Food Blog THE NIBBLE Blog » FOOD 101: Live & Active Cultures In Frozen Yogurt

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    THE NIBBLE’s Gourmet News & Views

    Trends, Products & Items Of Note In The World Of Specialty Foods

    This is the blog section of THE NIBBLE. Read all of our content on TheNibble.com,
    the online magazine about gourmet and specialty food.

FOOD 101: Live & Active Cultures In Frozen Yogurt

pinkberry-coffee-230

Inside: 10 million or more live and active
cultures. Photo courtesy Pinkberry.

 

“What happens to the beneficial bacteria in frozen yogurt,” a reader writes. “Does freezing kill them?”

No. Live culture frozen yogurt maintains the cultures’ benefits because the flash-freezing technique used in the production of frozen yogurt, unlike slow freezing in a freezer, only makes the organisms dormant. It does not kill them—or at least not all of them, as the number of bacteria in frozen yogurt is usually lower than that in the fresh yogurt from which it was made.

Yogurt is made by culturing milk with bacterial cultures. The words “live and active cultures” refer to the living organisms, Lactobacillus bulgaricus and Streptococcus thermophilus*, which convert pasteurized milk into yogurt during fermentation. (Note that the milk is pasteurized before culturing in order to remove any harmful bacteria.)

This fermentation process is what creates yogurt, with its unique taste, texture, and healthful attributes. The yogurt cultures—all the strains of bacteria added to the product—make up about 1% of the ingredients.

 

Not all yogurt has live and active cultures. Just as some manufacturers use different combinations of cultures, frozen yogurts are created with different processes. Some are heat-treated after culturing, which extends the shelf life of fresh yogurt but kills the cultures.

Why should you care about the live organisms? There is preliminary scientific evidence suggesting that live cultures in regular and frozen yogurt can boost your immune system, prevent osteoporosis, and prevent gastrointestinal infections, ultimately helping your digestive system as a whole.

 
*Other cultures may be added as well, but these are always the first two.

 

Different yogurt brands, fresh and frozen alike, add probiotics, which aid with digestion. Red Mango is one frozen yogurt brand that adds probiotics. Yovation is a packaged brand found in some natural food stores.

The levels that remain in frozen yogurt depend upon the numbers that were in the fresh yogurt from which it was made, and on the hardiness of the specific cultures that were used. Thus, Some frozen yogurts are better sources of live cultures and/or probiotics than others.

In order to receive the National Yogurt Association’s Live & Active Cultures seal—a voluntary labeling program—frozen yogurt is required to contain at least 10 million cultures per gram at time of manufacture (for fresh yogurt, it is 100 million per gram). The amount was agreed upon by research scientists who participated in studies of the health benefits of live cultures in yogurt products.

If you like a brand that doesn’t have the seal but want to know what’s inside, contact the manufacturer to ask what types of bacteria their product contains and how many live and active cultures are in the finished product.

 

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Look for the seal on boxes and containers. Image courtesy National Yogurt Association.

 

  





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