Photo of a giant 8 litre kombucha fermentation vessel with a giant scoby growin and a delicious fresh batch of natural and raw kombucha - boochacha

Debunking the Myth: The Safety of Home-Brewed Kombucha Uncovered

In the ever-expanding universe of health trends and dietary fads, kombucha has secured its place as a star, in the wellness galaxy. This effervescent elixir, praised for its probiotic properties and tangy taste, has not only found its way into the refrigerators of health enthusiasts but also into the hearts of DIY brewers all over the globe. However, a lingering myth casts a shadow over the home-brewing community: the question of safety. Is home-brewed kombucha safe to drink, or is it a recipe for risk? Let’s uncork the truth and dispel the doubts surrounding this fermented beverage.
The Myth
Home-Brewed Kombucha and Safety Concerns. The myth that home-brewed kombucha can be unsafe is rooted in concerns about contamination, proper fermentation, and the potential for harmful bacteria to thrive. These worries can deter many from attempting to brew their own kombucha, opting instead for store-bought varieties. But is this caution warranted, or is it simply a misunderstanding of the brewing process?
Photo of a complete kombucha starter kit from boochacha being set up in a beautiful kitchen, with the branding looking great and the kit being really easy and fun to use - boochacha
Understanding Kombucha and Its Fermentation Process
To debunk the myth, we must first understand what kombucha is and how it’s made. Kombucha is a fermented tea that has been consumed for centuries, originating from Northeast China around 220 B.C. The fermentation process involves a SCOBY (Symbiotic Culture Of Bacteria and Yeast), which acts as a living home for bacteria and yeast that transform sweet tea into kombucha.
During fermentation, the SCOBY consumes the sugars in the tea, producing acetic acid, trace levels of alcohol, and gases that carbonise the drink. This process also creates B-vitamins, enzymes, and a high concentration of beneficial bacteria known as probiotics.
Our proud founder Hebe, holding up a baby scoby to show students at a brewing workshop - boochacha
The Safety of Home Brewing: Fact vs. Fiction
Now, let’s address the elephant in the room: the safety of brewing kombucha at home. The truth is, with the right knowledge and precautions, home brewing can be just as safe as any other kitchen activity. Here’s how you can ensure your home-brewed kombucha is a safe sip of success:
  1. Cleanliness is Crucial – The foundation of safe kombucha brewing is cleanliness. Everything that comes into contact with your kombucha must be clean and sanitised. This includes jars, bottles, funnels, and even your hands. Use hot water and non-toxic, unscented soap to wash your equipment, and consider a vinegar rinse or a food-safe sanitiser for extra assurance.
  2. Quality Ingredients and SCOBY – The quality of your ingredients can significantly impact the safety and taste of your kombucha. Use high quality tea, and sugar. When it comes to the SCOBY, source it from a reputable supplier or a trusted fellow brewer. A healthy SCOBY is the heart of the kombucha and will help ward off unwanted bacteria.
  3. Consistent Brewing Conditions – Kombucha thrives in a warm environment, typically best between 24-29 degrees Celsius. Consistency is key; fluctuations in temperature can hinder the fermentation process and potentially invite mould or harmful bacteria. Find a spot in your home that maintains a steady temperature and is free from direct sunlight and drafts.
  4. Monitoring pH Levels - The acidity of kombucha is a natural defence against harmful microorganisms. By keeping the pH level between 2.5 and 3.5, you create an environment that is inhospitable to most contaminants. You can use pH test strips to monitor your brew’s acidity regularly.
  5. Sensory Checks - Look, Smell, and Taste Your senses are powerful tools in determining the safety of your kombucha. Before bottling, inspect your brew for any signs of mould, which typically appears as blue or green fuzzy spots on the surface. The smell should be vinegary but not unpleasant, and the taste should be tart and slightly sweet, without any off-flavors. If anything seems amiss, it’s better to err on the side of caution and discard the batch.

The Benefits of Home-Brewed Kombucha

Aside from the joy of crafting your own beverage, home-brewed kombucha offers several benefits. It’s cost-effective, customisable, and you have complete control over the ingredients and fermentation time, allowing you to adjust the taste to your preference. Moreover, brewing kombucha at home is a sustainable practice, reducing the need for single-use plastic bottles and packaging.

Common Home-Brewing Mistakes
To further ensure safety, be mindful of common brewing mistakes:
  • Avoid using metal containers or utensils, as metal can react with the acidic kombucha and damage the SCOBY.
  • Don’t over-ferment your kombucha, which can lead to an overly acidic and potentially harmful brew.
  • Ensure your brewing vessel is covered with a breathable cloth to prevent contaminants while allowing air to circulate.


Continuous kombucha brew in action, refill of sweet tea happening - BooChaCha
The myth that home-brewed kombucha is unsafe is just that—a myth. With proper hygiene, quality ingredients, and careful monitoring, you can confidently join the ranks of home brewers who enjoy safe, delicious kombucha. Embrace the art of fermentation, trust in the process, and let your kitchen be the birthplace of bubbly probiotic goodness. Cheers to your health and the demystification of home-brewed kombucha!
Remember, the key to successful and safe home brewing is knowledge and attention to detail. By following these guidelines, you can debunk the myth and enjoy the fruits of your fermentation labor with peace of mind, and if your’e looking at where is best to start, we at BooChaCha sell Complete Kombucha Starter Kits that are rated 5 stars over and over again by kombucha brewing newbies, and we offer a full customer support system for any extra guidance! Or, keep an eye out for a kombucha brewing workshop popping up near you! Happy brewing!
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