7 Reasons Why Fermented Foods Are Healthy

Learn why fermented foods are healthy—and why such selections as yogurt, tempeh, and sauerkraut should play a prominent role in your kitchen.

why fermented foods are healthy

With such a wide range of effects that can benefit your overall health, fermented foods deserve to be a regular part of your diet.

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Fermentation—a chemical process by which a carbohydrate is converted into an alcohol or an acid—has long been used in cultures all over the world as a food preserving technique. While beer and wine are produced by ethanol fermentation, where sugars are converted to the alcohol ethanol, fermented foods like kimchi, sauerkraut, and yogurt are made by lactic acid fermentation.  A bacteria called lactobacilli converts the starches and sugars in fruits or vegetables into lactic acid, which accounts for the distinct, sour flavor and smell of these foods.

Fermenting foods increases their nutritive value; for example, higher levels of niacin and riboflavin are found in fermented yogurt.[1] One of the main reasons why fermented foods are healthy is their high probiotic content.

Our body is always full of bacteria, both good and bad. Probiotics are the friendly bacteria that our body needs to stay healthy. Although you can buy isolated probiotics to take as a supplement, fermented foods are a great, inexpensive source of these vital bacteria for our bodies. Fermented foods also give you a better variety of natural bacterial strains than a probiotic supplement can offer.

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7 To Remember: Why Fermented Foods Are Healthy

So let’s get to our list. Here are seven health benefits of fermented foods:

  1. Probiotics improve digestion by enhancing the quality and availability of many dietary nutrients, making pH changes in the gut, producing vitamins and enzymes, and antagonizing pathogens such as Salmonella and some strains of E. coli.[1,2]
  2. The probiotics found in fermented foods are especially effective at fighting diarrhea.[1]
  3. Probiotics have wide ranging effects that can reach even the lungs, skin, and joints.[1]
  4. Studies show that probiotics enhance immune function.[1,2,3]
  5. They benefit lipid metabolism[1,4] and have antioxidant properties.[4,5,6]
  6. Probiotics and fermented foods exhibit anti-cancer effects.[1,7]
  7. They might even play a role in mental health by treating depression.[8]

Increase Your Consumption of Fermented Foods

With such a wide range of effects that can benefit your overall health, fermented foods deserve to be a regular part of your diet. Here are some common options that can likely be found in your local grocery store:

  • Sauerkraut
  • Pickles
  • Kombucha
  • Yogurt
  • Kefir
  • Cultured cheeses
  • Kimchi
  • Miso
  • Tempeh

Many traditional foods from around the world are also fermented. For example, injera is a type of fermented flatbread used in Ethiopian cooking, dosas are fermented crepes found in Indian cooking, and Salvadorean cuisine includes curtida, a fermented cabbage relish. Try out various types of fermented foods to find your favorite. (This primer about the book Fermented Vegetables has several tips within.)

Share Your Experience

What are your favorite fermented foods? Do you find eating these foods helps your digestion or benefits your health in another way? Share your experience in the comments section below.


[1] J Appl Microbiol. 2006 Jun;100(6):1171-85.
[2] Best Pract Res Clin Gastroenterol. 2013 Feb;27(1):139-55.
[3] Crit Rev Food Sci Nutr. 2014;54(7):938-56.
[4] J Med Food. 2013 Mar;16(3):223-9./a>
[5]
Food Chem. 2012 Dec 1;135(3):1914-9.
[6]
Food Microbiol. 2011 Aug;28(5):1062-71.
[7]
Phytother Res. 2012 Aug;26(8):1148-55.
[8]
J Physiol Anthropol. 2014 Jan 15;33:2.


Originally published in 2014, this post is regularly updated.

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Comments
  • I have been making and eating fermented vegetables for a couple of months now and give them credit for many improvements in my health. I have been learning to eat in a more healthful way and discerned that at my age dairy may not be the best choice for me. My digestion has improved greatly, I am no longer carrying weight in my guts and I think the veggie probiotics are finally helping my skin to become healthy. I have had acne for 35 years, and I have been able to greatly reduce the topical treatments I use. I wish I had known about this decades ago.

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