Kefir Vs. Yogurt: Which is a Better Probiotic?

Are you looking to improve your gut health? With so many options available, it can be challenging to decide which probiotic-rich food to incorporate into your diet. Among the popular choices, kefir and yogurt stand out as excellent sources of beneficial bacteria. But which one is the better probiotic? Let’s look into the details and uncover the truth.

In short, both kefir and yogurt offer valuable probiotic benefits. Kefir, a fermented milk drink, contains a diverse range of live bacteria and yeasts. It boasts a higher probiotic content than yogurt, making it a potent ally for gut health. On the other hand, yogurt, made by fermenting milk with specific bacterial strains, provides a good dose of beneficial bacteria, supporting digestion and immune function. So, while kefir takes the lead in terms of probiotic diversity, yogurt still offers notable benefits.

Remember, your gut health plays a crucial role in overall well-being, and choosing the right probiotic can make a significant difference. So, join us on this informative journey to discover the optimal choice between kefir and yogurt for a thriving gut.

The Process of Making Kefir and Yogurt

Kefir Production

Kefir, a traditional fermented milk beverage, is typically made by introducing kefir grains into milk. Kefir grains are small, gelatinous clusters of bacteria and yeasts. Although cow’s milk is commonly used, kefir can also be made with goat or sheep milk. The grains are added to the milk and left to ferment for a specific period, usually around 24 hours. During fermentation, the microorganisms in the kefir grains consume lactose, the natural sugar present in milk, and produce lactic acid and carbon dioxide, resulting in the tangy flavor and fizzy texture of kefir. Once the fermentation is complete, the kefir grains are strained out, and the resulting liquid is consumed as kefir. Interestingly, kefir grains can also be used to ferment water or coconut water, offering dairy-free alternatives with similar probiotic benefits.

Yogurt Production

Yogurt, another popular fermented dairy product, is made through a slightly different process. It starts with a yogurt mix, which is a combination of milk and a culture starter containing beneficial bacteria. The most common bacterial strains used in yogurt production are Streptococcus thermophilus and Lactobacillus bulgaricus. To make yogurt, the yogurt mix is heated to a specific temperature and then cooled. During this process, the bacteria in the culture starter ferment the lactose in the milk, converting it into lactic acid. The lactic acid causes the milk to thicken and gives yogurt its characteristic tangy taste. The yogurt is typically consumed in its thickened form and can be made from various types of milk, including animal milk (full-fat or low-fat), soy, coconut, or other dairy-free alternatives.

Microorganisms in Kefir and Yogurt

When it comes to the microbial composition, kefir and yogurt exhibit some differences.

Kefir Microorganisms

One of the advantages of kefir over yogurt is its wider variety of microorganisms. In addition to lactic acid bacteria, kefir contains beneficial yeasts like Saccharomyces cerevisiae and Saccharomyces unisporus. These yeasts contribute to the fermentation process and provide unique flavors and textures to kefir. The presence of yeasts in kefir is believed to enhance its antimicrobial and antifungal properties [1]. However, it’s important to note that the specific microbial composition of kefir can vary between batches due to the nature of kefir grains. This variation can make it challenging to ascertain and verify the precise health effects of kefir [1][3].

Yogurt Microorganisms

Yogurt, on the other hand, primarily contains lactic acid bacteria, such as Streptococcus thermophilus and Lactobacillus bulgaricus, which work symbiotically during fermentation to produce yogurt’s characteristic texture and flavor. While yogurt’s microbial composition is generally less diverse than kefir, it still provides beneficial bacteria for gut health [1][2].

Potential Health Benefits of Kefir

The consumption of kefir has been associated with several potential health benefits, thanks to its unique microorganism composition.

Antimicrobial and Antifungal Properties

The presence of yeasts like Saccharomyces cerevisiae and Saccharomyces unisporus in kefir contributes to its antimicrobial and antifungal properties. These properties can help inhibit the growth of harmful bacteria and fungi in the gut, promoting a healthy microbial balance [1]. By maintaining a balanced gut microbiota, kefir may help support overall digestive health.

Potential Benefits for Lactose Malabsorption

Kefir has also gained attention for its potential benefits in lactose malabsorption. Lactose malabsorption occurs when the body has difficulty digesting lactose due to insufficient lactase enzyme production. The fermentation process in kefir breaks down lactose into lactic acid, making it easier to digest for individuals with lactose intolerance. While kefir may not be entirely lactose-free, it contains significantly reduced levels of lactose compared to unfermented milk [1].

Probiotic Content and Nutritional Differences

In addition to their potential health benefits, both kefir and yogurt offer a range of essential nutrients.

Probiotic Content

When comparing kefir and yogurt as probiotics, kefir generally takes the lead in terms of probiotic content. Kefir’s wider variety of microorganisms, including yeasts, contributes to its higher probiotic count compared to yogurt [2][4]. Probiotics are beneficial microorganisms that support gut health and have been linked to various health benefits, including improved digestion and immune function [5].

Nutritional Similarities and Differences

Both kefir and yogurt provide essential nutrients, including protein, calcium, potassium, phosphorus, vitamin A, and B vitamins such as riboflavin, folate, biotin, and B12. These nutrients play vital roles in supporting overall health and well-being. Kefir and yogurt share similar nutritional profiles, but there are some differences worth noting. Kefir tends to have slightly less sugar than yogurt, although the sugar content can vary depending on the brand and added flavors [2]. Additionally, the fat content of kefir and yogurt can differ depending on the type of milk used in their production.

Considerations for Choosing Between Kefir and Yogurt

When deciding between kefir and yogurt as a better probiotic option, several factors should be considered.

Individual Preferences and Dietary Restrictions

Taste preferences, texture preferences, and dietary restrictions play a significant role in selecting between kefir and yogurt. Some individuals may prefer the tangy and effervescent nature of kefir, while others may enjoy the creaminess of yogurt. Additionally, dietary restrictions, such as lactose intolerance or the avoidance of animal products, may influence the choice of a dairy-free kefir alternative or plant-based yogurt.

Product Availability and Convenience

The availability of kefir and yogurt products may vary depending on the region. While both kefir and yogurt can be made at home, not everyone has the time or resources to do so. Considering the convenience of purchasing kefir or yogurt from local stores or online platforms is crucial.


In the battle of kefir vs. yogurt as better probiotics, kefir seems to have an edge due to its wider variety of microorganisms and potential health benefits. The antimicrobial and antifungal properties of kefir, along with its potential benefits for lactose malabsorption, make it an appealing choice for those seeking a diverse range of probiotics. However, it’s important to consider individual preferences, dietary restrictions, and product availability when making a decision. Consulting with healthcare professionals or registered dietitians can provide valuable guidance in choosing the best probiotic option that aligns with your specific needs and health goals.


Can kefir and yogurt be consumed by individuals with lactose intolerance?

Both kefir and yogurt can be suitable options for individuals with lactose intolerance. The fermentation process in kefir and yogurt helps break down lactose, making them easier to digest for those with lactose intolerance. However, the lactose content can vary depending on the brand and the fermentation process used, so it’s essential to check the product labels and choose lactose-free or low-lactose options if necessary.

Are kefir and yogurt suitable for vegans or individuals following a dairy-free diet?

While traditional kefir and yogurt are made from animal milk, there are dairy-free alternatives available for vegans or individuals following a dairy-free diet. Plant-based milk, such as soy milk, almond milk, or coconut milk, can be used to make vegan kefir or yogurt. These dairy-free alternatives provide a similar range of nutrients and probiotics as their dairy counterparts.

Can homemade kefir and yogurt provide the same benefits as store-bought varieties?

Homemade kefir and yogurt can provide similar benefits to store-bought varieties if prepared correctly. However, it’s important to ensure the quality and cleanliness of the ingredients and equipment used during the fermentation process. Additionally, the microbial composition of homemade kefir and yogurt can vary, depending on the specific strains used and the fermentation conditions. It may be helpful to use starter cultures or kefir grains from reliable sources to ensure consistent results.

Are there any potential side effects of consuming kefir or yogurt?

In general, kefir and yogurt are considered safe for consumption by most individuals. However, some people may experience temporary digestive discomfort, such as bloating or gas, when introducing probiotics into their diet. These symptoms usually subside as the gut adjusts to the new microorganisms. If you have any concerns or pre-existing health conditions, it’s advisable to consult with a healthcare professional or registered dietitian before incorporating kefir or yogurt into your diet.

Can kefir or yogurt be used in cooking or baking?

Both kefir and yogurt can be used as ingredients in cooking and baking. They can be used as substitutes for milk or buttermilk in recipes, adding a tangy flavor and moist texture to various dishes. Kefir and yogurt can be incorporated into smoothies, salad dressings, marinades, and even desserts. The possibilities are endless when it comes to incorporating these fermented dairy products into your culinary creations.

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