“Fermented honey” usually means honey with something moist added to it – garlic cloves, lemon slices, ginger, chilies – left in a jar until it starts to bubble. Fermented garlic honey is by far the most popular version, and it is also the one food-safety specialists warn about. This page explains what happens in the jar, why garlic is the problem, and what to make instead.
Why Honey Starts to Ferment
Most honey contains a small number of yeasts, along with bacterial spores. In ordinary honey they stay dormant: there is too little free water for them to grow, which is how the honey industry has long controlled spoilage (Snowdon & Cliver, 1996). Garlic, fruit and fresh roots are mostly water. Their juice dilutes the honey around them, the yeasts wake up, and you get bubbles, a thinner honey, a yeasty smell and a little alcohol.
That makes fermented honey a yeast ferment. It isn’t a probiotic food in the way yogurt or sauerkraut is: bacteria don’t multiply in honey (Snowdon & Cliver), and nobody has shown that a honey ferment delivers live beneficial bacteria. If you dilute honey with plenty of water instead, the yeasts ferment it into a drink – that’s mead, covered in our guide to fermented honey drinks and mead, and in Ethiopia’s honey wine tej.
Is Fermented Garlic Honey Safe?
There is no tested home method for it, and the specialists who have looked at it advise against it. The concern is botulism:
- The spores can be there. Clostridium botulinum spores turn up in a fraction of honey samples, normally at low levels (Snowdon & Cliver); a Turkish survey found them in 4 of 150 samples (Gücükoğlu et al., 2014). Garlic grows in soil, the bacterium’s natural home.
- Garlic is low-acid. Botulinum bacteria can’t grow at pH 4.6 or below – the line US rules use for acidified foods (21 CFR 114). Garlic is well above it.
- The jar creates the right pocket. As water leaves the cloves, the layer between garlic and honey becomes moist, airless and not acidic enough – “a perfect environment” for C. botulinum, in the words of an Oregon State University food-safety specialist, who concludes she is “not comfortable with the safety of garlic fermented in honey” (Ask Extension, 2023). Fermentation has to drop the pH quickly to be protective, and nobody has shown that honey ferments do.
- Warm storage makes it worse. Health Canada warned in 2026 that fermenting garlic in unpasteurized honey at room temperature can pose a botulism risk, and that storing the mixture at room temperature may increase it (Scientific American, 2026).
Bubbles and a pleasant sour smell don’t settle the question: you can’t see, smell or taste botulinum toxin (CDC). If you already have a jar of garlic honey that has been at room temperature for days or weeks, the CDC’s rule applies – if in doubt, throw it out.
The same reasoning applies to other moist, low-acid additions. Fresh ginger (pH about 5.6–5.9) and fresh peppers (about 4.7–5.5) are above 4.6 too (K-State Research and Extension pH chart), and herbs in oil carry the same warning as garlic in oil (CDC).
Safer Ways to Combine Garlic and Honey
You can still have garlic and honey together; just don’t leave them fermenting in a jar.
- Make it fresh and keep it cold. Crush a few cloves into a few spoonfuls of honey, keep it in the fridge and use it within 4 days. That’s the limit food-safety agencies set for fresh garlic in oil (CDC, UC ANR); honey hasn’t been tested, so treat it the same way.
- Keep the garlic in vinegar, add honey when you use it. Peeled cloves covered with full-strength vinegar or wine keep for about 4 months in the fridge, because the acid holds them below pH 4.6 (UC ANR). Stir a spoon of honey into the garlicky vinegar for a dressing or glaze.
- Cook with it. For a honey-garlic glaze, simply warm honey with fresh garlic in the pan and use it straight away.
For garlic that is actually lacto-fermented in brine, and why garlic is a slow, unreliable fermenter, see our fermented garlic guide.
A Lower-Risk Choice: Lemon Honey
If you want to watch a honey ferment bubble, choose an acidic fruit. Lemon juice has a pH of about 2.0–2.6 (K-State Research and Extension), far below the 4.6 that botulinum bacteria need, so the risk that rules out garlic doesn’t arise. Lemon slices covered in honey soften over a week or two while the honey thins, bubbles gently and takes on a bright, slightly bitter citrus taste – a good base for hot drinks and dressings (recipe card below). No fermented honey of any kind has been tested by a food-safety lab, so the usual rules still apply: keep the fruit covered, refrigerate once it tastes the way you like, and throw out any jar with fuzzy mold. Our guide to kahm yeast and mold shows the difference.
Honey and Babies
Never give honey to a child younger than 1 year – raw, pasteurized, cooked or fermented (CDC). Spores that are harmless to older children and adults can grow in a baby’s gut and cause infant botulism.
For storage times of other home ferments, see how to store fermented foods.
