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Yeast in Kombucha - 3 Things you Should Know

Yeast in Kombucha - 3 Things you Should Know

If you’re a kombucha brewer, you’ve definitely seen yeast before. We get lots of questions about what that brownish stringy stuff is that’s floating around your brew or growing along the bottom of your SCOBY. Don’t worry, it’s not mold, its just yeast! While it might not be the most attractive part of home brewing (and can even make your brew look a bit cloudy), yeast plays a critical role in the fermentation process and helps carbonate your kombucha by releasing carbon dioxide.  We personally love to pop a bottle of booch with lots of carbonation

Yeast is a single-cell, fungal organism that feeds off of sugar. It’s the “Y” in the acronym SCOBY! (Did you know SCOBY was an acronym? It stands for Symbiotic Culture of Bacteria & Yeast) There are nearly 30 different types of yeast found in kombucha and the specific mix and type are influenced by the SCOBY and local yeast environment. The most common strains of yeast in kombucha are Saccharomyces, Brettanomyces, and Zygosaccharomyces. While the names may sound a little technical, here are three interesting facts about yeast we think every brewer needs to know: 

Clump of brown good growing in kombucha

  • Yeast is beneficial to both brewing and your body! It is a probiotic that helps keep your gut balanced and digestion moving along. It can also help reduce flare ups from harmful yeast like Candida. If you have a Candida overgrowth in your gut and begin to drink kombucha, you may notice symptoms temporarily flare up while the probiotics in the yeast go to work rebalancing your gut.
  • Yeast is rich in B vitamins, which do EVERY body good by stabilizing your mood and helping fight depression. Additionally, the B6 and B12 vitamins found naturally in kombucha yeast are great for hormone balance, memory, skin, digestion and enzyme production - to name just a few!
  • Yeast has been given to athletes for hundreds of years because it increases vitality and decreased distractions. Yeast is also rich in zinc (repairs tissue), selenium (repairs cell damage), and reduces iron deficiency! Enjoy a glass of kombucha before your next workout. 

So if you’re noticing some brown stringy stuff growing around your SCOBY or in your brew, don’t worry about it. If you see something in your jar that green and white that looks like mold, check out our quick read about what causes mold

Kombucha SCOBY with clump of yeast

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  • The YEABUCHA Sisters on

    Most likely those little strings are yeast, which is perfectly normal and safe! You can remove some of the yeast simply by taking a spoon and picking it out, or straining it during your next time brewing.

  • Lana Morris on

    I have been brewing my own kumbucha since Aug 2021, I find the process therapeutic and have a few friends that look forward to their weekly bottle. My twoscobies have black string like dangling from them, are they no good now, do I need to get rid of the black strings and how do I do that safely and keep my scoby mould free? Many thanks in advance

  • The YEABUCHA Sisters on

    Hi Kristin, while we would typically need a picture to correctly asses what has happened here, it sounds like the seaweed may be an abundance of yeast in your brew and the black speckles might be remnants of loose leaf black tea that you used in your sweet tea? If you are a YEABUCHA brewer, feel free to reach out to us directly via our brewing community group on Facebook or send a DM to our instagram @yeabucha.

  • Krisitn on

    Is the Kombucha spoiled when it has a cloudy substance (like seaweed) floating around with black speckles??

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