Kefir vs kombucha: Which fermented drink is best for your gut health?

Both are fermented favourites, but kefir and kombucha are very different drinks. Kefir is creamy, protein-rich and packed with diverse live cultures, while kombucha is a refreshing, fizzy ‘tea’ with its own unique mix of microorganisms and fermentation by-products.

So, when it comes to kefir vs kombucha, which one comes out on top?

Both are fermented favourites, but kefir stands taller: more cultures, more science, more benefits!

What are kefir & kombucha?

The world of fermented beverages has a long history, with evidence of fermented drinks going back thousands of years! Evidence indicates that people fermented drinks in Babylon around 3000 BCE.¹ Long before probiotics were a recognised term, ancient civilisations were turning to fermentation not only for preservation, but for their health, energy, and as part of sacred rituals.

Kombucha is believed to have originated in China more than 2,000 years ago. It has traditionally been associated with health and longevity and has sometimes been described as the “tea of immortality” or “elixir of life”.

Kefir is thought to have originated in the Caucasus Mountains. Traditionally, milk was fermented using kefir grains, which were carefully passed down through generations. In the region, kefir grains have also been referred to as the “grains of the prophet”, reflecting traditional stories surrounding their origins.

Kefir eventually spread beyond the Caucasus and became popular in Russia and other parts of Europe during the early 20th century..²

Today, both kefir and kombucha are firmly established in the world of fermented foods and drinks. But how are they made, and what makes them different?

How are kefir & kombucha made?

Both kefir and kombucha require a starter and go through a fermentation process.

Real kefir is made with milk and live kefir grains. The grains are added to the milk and left to ferment for 18-48 hours. At Chuckling Goat, our kefir is left to ferment for at least 36 hours. After fermentation, the grains are removed and ready to be used again, and the leftover liquid is kefir.

Kombucha is made using a symbiotic culture of bacteria and yeast (SCOBY), tea, and sugar. It is usually made with either green or black tea. The SCOBY sits in the tea mixture for 10-14 days, during which sugar is usually added to sweeten the taste. Interestingly, while this process is happening, another SCOBY forms at the top of the mixture, which can be used to make a further batch of kombucha.

Kefir vs kombucha: What’s the difference?

Kefir	Kombucha
Made using dairy, sometimes water. Chuckling Goat’s Kefir is made with A2 goat dairy.	Made using green or black tea.
Higher in calories.	Lower in calories.
Contains lactic acid bacteria, including Lactobacillus, and Leuconostoc. Chuckling Goat Kefir has 95 naturally occurring beneficial live cultures.	Has acetic acid bacteria, including Acetobactter and Gluconobacter.
Kefir tends to have more protein, vitamins, and minerals.	Kombucha may have additional antioxidants.
It can be consumed neat, as part of a smoothie or shake, added to oats for breakfast, or even used to make a salad dressing.	It can be consumed on its own as a nice, fizzy beverage, or used as a mixer in mocktails and cocktails.
Due to its fermentation process, kefir has a low lactose content, making it more tolerable for those with lactose intolerance.³	During the fermentation process, the production of ethanol and acetic acid inhibits the growth of pathogenic bacteria within the kombucha itself.⁴

Both kefir and kombucha are rich sources of probiotics and antioxidants, and they both help to reduce blood pressure and cholesterol.

They are both anti-inflammatory, immunomodulatory, and antimicrobial. They are also both antidiabetic as they decrease postprandial glucose levels and aid in detoxifying and protecting the liver and blood.⁵

Kefir can provide a wider range of live cultures

One of the most interesting differences between kefir and kombucha is the microbial diversity associated with their fermentation.

Kefir can contain a diverse community of lactic acid bacteria and yeasts. Chuckling Goat kefir contains 95 naturally occurring beneficial live cultures, making microbial diversity one of its key features.

Kombucha also contains bacteria and yeasts, including microorganisms associated with acetic acid fermentation. However, its microbial composition can vary considerably depending on the tea, SCOBY, fermentation conditions and production method.

Kefir provides more protein & nutrients

Because milk kefir is made from milk, it naturally provides protein, calcium and other nutrients found in dairy.

Kombucha, on the other hand, is tea-based and generally much lower in protein and calories. However, the tea used to make kombucha contains plant compounds such as polyphenols, which can contribute antioxidant activity.

The nutritional value of either drink ultimately depends on how it is made and the ingredients used.

What do kefir & kombucha have in common?

Both kefir and kombucha are fermented foods, meaning microorganisms transform the original ingredients during fermentation.

They’re rich sources of probiotics and antioxidants, and they both help to reduce blood pressure and cholesterol.

They’re also both anti-inflammatory, immunomodulatory, and antimicrobial, known to decrease postprandial glucose levels and aid in detoxifying and protecting the liver and blood.⁶

The verdict

While kefir and kombucha are well-loved fermented wellness drinks, their differences in taste, ingredients, and benefits make them unique. Kefir offers a creamy, protein-rich, potent probiotic that benefits gut and bone health, among many other benefits. Kombucha offers a fizzy refreshment rich in antioxidants and perfect for those unable to consume dairy.

While both drinks have their place, real, traditionally fermented kefir delivers a far broader spectrum of live cultures and proven benefits, making it the heavyweight champion of gut-friendly superfoods!

Of course, the best choice is the one that fits your body, taste, and lifestyle. Even better, you don’t have to choose! Why not try both and see how they make you feel? You may enjoy a kefir smoothie in the morning, and by evening, you may opt for a kombucha while socialising for a little kick without the alcohol.

Fermented foods are not just trends but opportunities to reconnect with traditional ways of supporting your health.

You can read more about kefir here.

Looking for more ways to improve your gut health? Check out this article – Upgrade your gut health with these 5 easy prebiotic habits

Any questions? Contact one of our Nutritional Therapists via live chat, weekdays from 8 am to 8 pm.