Milk kefir and water kefir are two entirely different ferments that share a name. Milk kefir is a lightly fizzy tangy fermented milk drink made with milk kefir grains. Water kefir is a light, refreshing bubbly drink made with different grains (sometimes called tibicos) fermented in sugar water. Neither one is a version of the other.
Here's a straight comparison to help you pick which to make first.
If you keep a sourdough starter alongside your kefir, mine is a live San Francisco culture — the two live happily on the same shelf.
Quick comparison table
| Feature | Milk kefir | Water kefir |
|---|---|---|
| Base | Fresh milk (cow, goat, sheep) | Sugar water (± dried fruit) |
| Grains | White, cauliflower-shaped, softer | Translucent, crystalline, harder |
| Texture | Creamy, yoghurt-like, thick | Light, spritzy, water-like |
| Flavour | Tangy, sour, slightly yeasty | Light, slightly sweet, apple-cidery |
| Ferment time | 18–36 hours | 24–48 hours |
| Dairy-free | No (unless using coconut/oat) | Yes |
| Use in cooking | Dressings, baking, smoothies, cold soups | Cocktail mixer, soda alternative, shrubs |
The grains are completely different organisms
Despite sharing the "kefir" name, the two types of grains are unrelated. Milk kefir grains are a symbiotic culture of bacteria and yeasts held together by a polysaccharide called kefiran. Water kefir grains (tibicos) are a different symbiotic culture with different bacterial and yeast strains that thrive on sugar rather than lactose. You cannot convert one to the other.
Which should you make first?
Milk kefir is the easier starting point for most UK beginners because:
- Fresh milk is in every fridge already
- Grains are more robust and forgive missed feedings
- The finished drink is familiar — it's very close to a drinkable yoghurt
- Our live milk kefir culture gives the same creamy, tangy result without the daily straining — one sachet makes 150+ batches
- Our Kef-Kwik mix is there if you want the tang in seconds rather than overnight
Water kefir is more interesting for advanced fermenters because:
- You can flavour it endlessly — juices, herbs, dried fruit, spices
- It doubles as a soda alternative for kids or non-alcoholic entertaining
- Vegan-friendly out of the box
Getting started
If milk kefir sounds like your move, read our full beginner's guide, or start with our live milk kefir culture — one 15 g sachet, 150+ batches, no daily straining. If you'd rather have it instantly, Kef-Kwik makes a tangy kefir-style drink in seconds.
Make your own milk kefir
Our live milk kefir culture gives you thick, creamy, tangy kefir without the daily straining that traditional grains demand. One 15 g sachet makes 150+ batches and keeps going indefinitely. Contains milk.
Shop Milk Kefir Live Culture →
