The Truth About Water Kefir: What They Don’t Tell You

With the growing interest in gut health, probiotics have become a major focus in the health industry. Supplements, probiotic-rich foods and drinks are all part of a multi-billion dollar worldwide industry that continues to grow each year as consumer awareness of the benefits of beneficial bacteria on overall health and wellness increases. Some have ventured into making their own probiotic-laden foods and drinks for maximum benefits and savings. Homemade water kefir is one of these products that has gained popularity. In this article, we will explore the truth about homemade water kefir, specifically what is not commonly shared concerning the problem of unwanted alcohol content.

Unwanted Alcohol in Homemade Water Kefir

When I began learning about the microbiome and the role it plays in the health of the immune system, I began looking into how I could introduce more gut-healthy bacteria into my family’s diet. I had already been taking a probiotic for a few years, and it had helped me become more regular. But now I became hopeful that perhaps I could strengthen my kids’ immune systems so they wouldn’t pick up every bug they came in contact with at swimming lessons.

After reading a few articles and watching a YouTube video, I felt ready to start making my own water kefir. The fizzy drink that was promised after doing a second ferment with juice especially appealed to me. I was hoping this would also appeal to my children.

I bought a packet of water kefir grains from the health food store and followed the instructions to activate them. It was finally time to make my first batch!

I completed the first ferment and then transferred the water kefir to a swing-top bottle for a second ferment, adding about 1/4 cup of grape juice. After a day, I eagerly opened the bottle — maybe a little too eagerly! The water kefir exploded out of the bottle, clear across the kitchen and into the living room. I had read to be careful when opening the bottle, but I had not expected this! I lost half of the water kefir, but my husband and I drank the rest. And that’s when I realized there was a problem.

After drinking half a glass, I began to feel drowsy with a warmth that ran through my body. I poured my husband a glass and asked him if there was alcohol in it. After a few minutes, he confirmed there was alcohol in it, and enough to cause his head to spin and require him to lie down.

This puzzled me. Nowhere had I read that water kefir contained alcohol. I must have done something wrong.

So I researched and discovered that water kefir contains some alcohol, but it should be low, typically under 1% alcohol by volume. What I had made definitely contained more. What had happened? Here’s what I learned:

Fermentation Time

I learned that the longer the kefir is left to ferment, the higher the alcohol content. This happens because the yeast will continue to break down the sugar, and the byproducts of this process are carbon dioxide and alcohol, hence the need to be careful when opening the bottle!

Sugar Content

The amount of sugar added to the initial mixture increases the alcohol content. When there is more sugar, the yeast consumes more of it, producing more carbon dioxide and alcohol as byproducts.

Temperature

The temperature at which the fermentation takes place can also impact the alcohol content of the final product. Fermentation speeds up at warmer temperatures and slows down at cooler temperatures.

Further Attempts

Now that I had researched what might have gone wrong, I felt confident that my second attempt would be successful. I cut the fermentation time in half and tested the second batch. There was still a lot of C02 but I hoped the alcohol would be significantly reduced. Unfortunately, that was not the case. The second batch seemed to have just as much alcohol as the first batch — I felt woozy and my husband passed out on the couch.

After a few more failed attempts where I adjusted the sugar, the type of juice added for the second ferment, and even the temperature, I disappointedly concluded that water kefir was not going to work for our family. Health benefits aside, I was not willing to drink that much alcohol, and I certainly wasn’t going to give it to my kids.

A New Hope — Coconut Water Kefir

After a couple of weeks, I came across a post about coconut water kefir. I remembered reading that using unsweetened coconut water was an option for reducing the amount of alcohol created in the fermentation process. With this hope, I decided to try water kefir again, but this time I would use unsweetened coconut water.

There were a couple of things I decided to do differently: first, I would use unsweetened coconut water; and second, I would not do a second ferment at room temperature.

What I later opted to do was add 1/4 cup of grape juice after transferring the coconut water kefir to a bottle after the first ferment. Then, I sealed the bottle and immediately placed it in the fridge.

Success At Last

This time when I tested a glass of coconut water kefir, I did not get the same drowsy feeling I had with water kefir, and my husband, who I had now discovered was more of a lightweight than I was, experienced no negative effects.

My skin has also improved, and my son, who had a chronically white coating on his tongue, now has a completely pink tongue. This gives me hope that his overall health is improving.

Further Experimentation Shows Type of Sugar Matters

After a year-long break, I decided to give water kefir another try—and I’m so glad I did! This time, I started with a fresh batch of kefir grains and swapped the coconut sugar for cane juice crystals. The result? A light, refreshing water kefir that’s low in alcohol and safe for kids—perfect for the whole family. I’d originally used coconut sugar because I don’t keep white sugar in my pantry, but here’s what I discovered: the higher mineral content in coconut sugar can actually increase the alcohol content in your brew. If you’re looking to make kid-friendly water kefir at home, cane sugar or cane juice crystals are definitely the way to go!

Final Thoughts

If you’ve been struggling with strong or boozy-tasting water kefir, the type of sugar you use might be the culprit. Coconut sugar’s high mineral content can actually lead to higher alcohol levels—something I didn’t realize at first! Switching to cane juice crystals made all the difference, resulting in a fizzy, lightly sweet, and kid-friendly water kefir that I feel good about serving to my family. And if you’re still concerned about alcohol content, try making coconut water kefir—it’s a fantastic lower-alcohol water kefir option because it ferments naturally with less sugar. With just a few simple tweaks, you can enjoy a refreshing, probiotic-rich drink suitable for the entire family.

If you would like to learn how to make coconut water kefir, check out my simple step-by-step recipe here.

Do you have experience with making water kefir? I would love to hear about it! Please share your comments below!