Why Is Kefir Bad for You? Side Effects, Disadvantages (2024)

  • What Is It?
    • What is kefir?
  • Side Effects
    • 5 disadvantages of consuming kefir
  • Health Benefits
    • What are the health benefits of kefir?
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Why Is Kefir Bad for You? Side Effects, Disadvantages (1)

Kefir is a fermented drink that may contain the following five side effects when consumed in excess.

Kefir is the most popular fermented drink produced from the fermentation of fresh raw milk by bacteria and yeast. It is often mistaken for buttermilk, but it is a completely different drink because it is milk mixed with kefir grains.

During the fermentation process, sugars in milk are broken down, and the milk becomes a sour drink with fizz and alcoholic properties.

Kefir contains probiotics that have many health benefits. However, excess consumption of kefir is related to various side effects and disadvantages.

What is kefir?

Kefir, a fermented milk beverage, is a traditional Caucasian drink that is labeled as the “champagne of the dairy industry” because of its rich flavor profile and slightly fizzy and alcoholic characteristics.

Chemicals such as lactate, acetate, diacetyl, ethanol, and acetaldehyde produced during the fermentation process give kefir its characteristic flavor. The yeast produces carbon dioxide during the fermentation process that gives the drink its characteristic fizziness.

Milk extracted from kefir grains is fermented to produce kefir.

  • Kefir grains are off-white, irregularly shaped clumps of lactic acid bacteria and yeasts bound together that resemble cauliflower florets.
  • Fermented milk is filtered, and kefir grains are saved for future kefir manufacturing.
  • Fermentation conditions and the grain-to-milk ratio can have a significant effect on the final qualities of kefir produced.

5 disadvantages of consuming kefir

Five disadvantages and side effects of consuming kefir include:

  1. Causes allergies: If you are allergic to milk, you should avoid drinking kefir because it may induce significant, life-threatening allergic reactions. Kefir may be prepared with non-dairy “milk,” such as rice milk, which is safe for consumption if you have a milk allergy. However, discuss with your doctor before making any dietary changes in case you have food intolerances.
  2. Causes risk of diabetes: Although some studies have reported that kefir is a helpful drink for people with diabetes because it reduces blood sugar levels, other types of kefirs, particularly fruit-flavored kefir, can include a lot of added sugar, which people with diabetes should avoid. People with diabetes must read the labels to assess sugar levels in the drink.
  3. Increases the risk of infection: If you are undergoing cancer treatment or any other treatment that suppresses immunity, you must avoid intake of kefir. The immune system in people with cancer or suppressed immunity is compromised. Microorganisms present in kefir may cause harmful effects on the body such as infection or sepsis.
  4. May contain alcohol: Alcohol is produced spontaneously during the fermentation process. Although the quantity of alcohol in kefir is usually less than one percent, children and people who are sensitive to alcohol or in recovery should be aware of this. Some brands specifically claim that their product contains no alcohol.
  5. Exerts adverse effects on the gastrointestinal system: Kefir may cause gastrointestinal side effects such as,
    • Constipation
    • Diarrhea
    • Gas
    • Bloating
    • Abdominal cramps

All these adverse side effects may subside within a week. You are recommended to reduce kefir consumption until your body responds well to increased probiotics.

QUESTION Which is one of the few drinks to be considered a superfood? See Answer

What are the health benefits of kefir?

Kefir is known as a beverage with several health benefits, such as historically being used to treat various diseases including:

  • Gastrointestinal issues such as irritable bowel syndrome or frequent constipation
  • Hypertension management
  • Allergies
  • Ischemic heart disease

According to some studies, kefir contains properties such as:

  • Anticancer
  • Antimicrobial
  • Cholesterol-lowering
  • Gut flora-modulating

Although numerous studies are worthy of future investigation, comparing them and defining the benefits of kefir drinking has proved challenging due to the inherent variability in preparations.

  • Keeps well hydrated:
    • Incorporation of kefir into a regular water intake regimen encourages you to drink more water and keeps you well hydrated throughout the day. Keeping yourself well hydrated is necessary to lower stress and prevent muscle cramps, and it provides you with energy and improves your skin health.
  • Alternative to soda:
    • Replace soda or fruit juice with water kefir to cut back on sugar. Kefir contains the fizz of sodas but not the high sugar content. High sugar in drinks elevates insulin and glucose levels in your blood.
  • Boosts immunity:
    • Kefir is rich in probiotic bacteria that play an important role in many aspects of your health, including immunological function. Research has found that probiotics are useful in improving intestinal health, stimulating an immune response, reducing serum cholesterol, and preventing cancer.
  • Reduces the risk of cancer:
    • Kefir is believed to help prevent the growth and spread of breast and colon cancer. However, further studies are needed to support this statement.

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References

Image Source: iStock image

Kefir - Uses, Side Effects, and More: https://www.webmd.com/vitamins/ai/ingredientmono-1056/kefir#:~:text=When%20taken%20by%20mouth%3A%20Kefir,usually%20stop%20with%20continued%20use.

Kefir: https://www.sciencedirect.com/topics/food-science/kefir

Why Is Kefir Bad for You? Side Effects, Disadvantages (2024)

FAQs

Why Is Kefir Bad for You? Side Effects, Disadvantages? ›

Kefir contains live bacteria and yeast. The immune system usually controls bacteria and yeast in the body to prevent infections. Taking kefir along with medications that decrease the immune system might increase the chances of getting sick from bacteria and yeast.

What is the negative effect of kefir? ›

For most people, fermented foods like kefir are considered safe. But when you first take probiotics, you may experience digestive issues like increased gas, bloating, or diarrhea. These usually settle down after a few days as your body adjusts.

Who should not drink kefir? ›

It appears to be generally safe to consume, as long as people make and store it safely. While people who are lactose intolerant may be able to drink some kefir without symptoms, they should be careful to avoid drinking too much. People with milk allergies should avoid kefir unless it contains non-dairy milk.

Does kefir affect bowel movements? ›

Studies on the effect of Kefir on Bowel Movement

Research has found that probiotics slow down 'gut transit time' by 12.4 hours, which increases the number of weekly bowel movements by 1.3, as well as soften stools making them easier to pass along the GI tract.

What happens to your body when you drink kefir everyday? ›

Kefir helps lower your blood pressure, manage your cholesterol levels, and improve your triglycerides (fats in the blood). It may even help prevent future cardiac events. Kefir is a good source of calcium, which you need for good bone health.

What should you not mix with kefir? ›

We do not recommend mixing maple syrup, agave, or honey with your kefir. Maple syrup and agave have a high GI rating, which disrupts your microbiome. Honey is a natural antibiotic, which interferes with the good probiotics in the kefir.

Is kefir hard on the liver? ›

Is kefir good for your liver? Yes. Kefir can significantly improve your liver health by combating fatty liver syndrome. This medical condition usually arises when there is increased fat accumulation inside and around your liver.

Is kefir hard on kidneys? ›

However, both studies showed a beneficial effect of kefir into the kidney, demonstrating a potential therapeutic use of this substance in preventing renal diseases.

How to tell if kefir is bad? ›

You should also notice that the kefir smells a little sour/vinegary and possibly cheesy/yeasty. The milk will have thickened and it will no longer look like milk.

Can kefir cause gut problems? ›

When taken by mouth: Kefir is possibly safe when used for up to 12 weeks. It's usually well-tolerated. Side effects might include bloating, nausea, stomach cramps, diarrhea, and constipation.

Does kefir cause inflammation in the body? ›

For instance, fermented products like yogurt and kefir are anti-inflammatory whereas products high in saturated fat, such as cheeses and ice cream, may promote inflammation.

Is kefir good for the colon? ›

Kefir has the potential to promote a favorable bacterial balance in the large intestine, improve lactose digestion, and perhaps improve stool consistency. If you have IBS and have found that your system is extremely reactive to milk products, you do have the option of trying a coconut milk kefir.

Does kefir reduce belly fat? ›

Several studies now also suggest that kefir can help reduce visceral fat levels in the body. Probiotics can alter the make-up of your gut microbiome. Some of them even play a role in weight regulation. Bacteria from the Bifidobacterium and Lactobacillus family are found to help lose belly fat.

How many times a week should you drink kefir? ›

Kefir can be a healthy and delicious addition to a well-rounded diet. For best results, stick to around 1–3 cups (237–710 mL) per day and pair it with a variety of other fermented foods and beverages to increase your intake of probiotics.

Is it better to drink kefir in the morning or at night? ›

You don't necessarily have to drink kefir in the morning, but you should avoid drinking it before you go to bed at night. Since kefir has an impact on your digestive system, it can keep you from getting a peaceful night of sleep. Instead, you should try to have kefir during a time when you're going to be active.

How long does it take for kefir to heal your gut? ›

Studies show that kefir can improve health when people drink it regularly (usually daily for 2–4 weeks).

Does kefir spike blood sugar? ›

Studies have shown that consumption of one cup of kefir daily decreased fasting blood glucose and HbA1C levels, as well as decreased inflammatory cytokines.

Is it better to drink kefir or take probiotics? ›

However, an open access study published in the peer-reviewed Nature journal suggests that kefir may be the most effective. thanks to the fermentation process and contains live probiotic bacteria. It has been associated with anti-cholesterolemic, anti-inflammatory, and anti-pathogenic effects.

What is the anti-inflammatory effect of kefir? ›

The beverage reduces inflammation through the alternation between innate, Th1, and Th2 responses, reducing levels of pro-inflammatory cytokines while increasing those of anti-inflammatory ones.

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