Finding real, live kefir grains in London is harder than it sounds. Most supermarkets sell finished kefir drink but not the grains, and the dehydrated «kefir starter» sachets sold in health food shops are a different (and inferior) product. Here's a practical guide to getting genuine grains in London, what to expect at pickup, and a few warnings.
Real grains vs. starter powder: know the difference
Two products are sold under similar names. They are not the same.
- Live kefir grains: small white aggregates that look like miniature cauliflower florets. They are alive, multiply over time, contain 30+ microbial species, and theoretically last forever with care. This is the traditional product.
- Kefir starter powder: a freeze-dried selection of a few microbial strains. Each sachet ferments one batch (or a few consecutive batches) and then needs replacement. Convenient but inferior in flavour, complexity, and longevity.
Almost all «kefir grains» sold via UK e-commerce/health retailers are starter powder. If you want the real thing, you need to source from a home fermenter.
Where to find live grains in London
Direct from a home fermenter (recommended)
The best option. People who keep kefir grains routinely have excess: grains multiply faster than the household drinks the kefir. Many fermenters give them away or sell small portions.
I (Emily) keep grains in central London and sell starter portions from £20. Pickups are arranged via WhatsApp, anywhere across Shoreditch, Hackney, Camden, Notting Hill, or Clapham. Details and contact info on the homepage.
Online exchange groups
Several UK Facebook groups and subreddits cover home fermentation. Search for terms like «UK Fermentation Exchange», «London Fermenters», or check r/Kefir and r/fermentation. People often post excess grains for free or for a few pounds to cover postage.
Drawback: response times are unpredictable, and quality varies. You won't always know how the grains have been treated or whether they've gone through a long pause that requires reactivation.
Specialty stores: cautious yes
A few zero-waste shops, fermentation-focused delis, and health food stores in London occasionally stock real kefir grains. Worth asking at places like Borough Market specialty stalls, Daylesford, or independent zero-waste shops in Hackney and Walthamstow. Stocks are unreliable, and prices are often higher than direct from a fermenter.
Borough Market and farmers' markets
On a good day, you might find kefir-related products at Borough, Maltby Street, or Broadway Market. The grains themselves rarely appear, but cultured dairy products do, and you might meet someone who can point you toward a local fermenter.
What to expect at pickup
When you collect live grains, you should receive:
- 20-30 g of grainsin a small glass jar with a little fresh milk covering them. Don't worry about the milk in the jar — it's nourishment for transport.
- Written or verbal instructions covering: ratio (grains to milk), fermentation time, how to filter, and how to repeat the cycle.
- An honest answer about how the grains have been kept lately (room temperature daily, in the fridge, recently reactivated, etc.). If they were paused recently, they may need a few cycles to wake up.
What to do in the first 48 hours
- When you get home, pour off the transport milk and put the grains in fresh whole milk at a 1:10 ratio (e.g., 30 g grains in 300 ml milk).
- Cover with cloth (not a sealed lid) and leave at room temperature. A normal London flat is fine.
- Check after 18-24 hours: when the milk is clearly thickened, with a little yellowish whey separating at the bottom, it's ready.
- Filter, repeat. Drink the resulting kefir, or save it for cooking.
For complete instructions read the step-by-step guide to making kefir at home.
Warning signs in seller listings
A few things to be skeptical about:
- «Kefir grains shipped from abroad in a sealed packet»: usually starter powder, not live grains.
- «Dehydrated kefir grains»: can be legitimate (real grains can be dried for storage), but they need 5-7 days of reactivation before producing kefir, and not all of them survive. Inferior to live grains for a beginner.
- Prices over £40 for a small starter portion:generally overpriced. Grains are abundant in the UK home fermentation community.
- Sellers who can't answer basic questionsabout feeding, ratios, or fermentation time: probably resellers rather than fermenters.
Once you have grains
Caring for kefir grains is easy: feed them milk daily, keep them at room temperature, filter them every 24 hours. The longer term details are in long-term kefir grain care. If you ever travel for an extended period, look at how to travel with kefir grains for pause options.
Frequently asked
Can I get kefir grains at supermarkets in London?+
No. Supermarkets like Tesco, Sainsbury's and Waitrose sell ready-made kefir drink (Biotiful, Yeo Valley, etc.), but not the grains. For real grains you need home fermenters who give or sell their excess.
How much should I pay for grains?+
In London, expect to pay £15-£25 for a starter portion (20-30 g) from a trusted home fermenter. Anything significantly more is overpriced unless you're buying a much larger quantity. Some fermenters give them away for free in exchange for friend referrals.
Do I need a refrigerator at the pickup point?+
Not for the grains themselves — they handle 30-60 minutes at room temperature without issue. If you're traveling more than 2 hours after pickup (e.g., taking the Overground across town), ask for a small ice pack.
