Description
Probiotic Rich
Crafted through natural fermentation for superior gut support.
Lab Tested Purity
Regularly lab screened to ensure 100% pathogen free purity.
Simple and Versatile
Easily to brew at home with minimal equipment.
What Are Milk Kefir Grains?
Milk kefir grains are living symbiotic cultures of bacteria and yeast that ferment whole milk into a probiotic rich drink containing billions of CFUs per serving. Our heirloom kefir grains are self propagating, they grow, multiply, and remain active indefinitely with regular feeding. NutriBrew’s strains are direct descendants of original Caucasus cultures, known to harbour diverse communities of lactic acid bacteria, acetic acid bacteria, and beneficial yeasts within a natural kefiran matrix.
New to kefir? Find out exactly what kefir is and how it is made before you get started.
The Science Behind Milk Kefir Grains
Kefir grains form a complex polysaccharide matrix called kefiran, which acts as a natural habitat for communities of lactic acid bacteria, acetic acid bacteria, and yeasts living in stable symbiosis. This structure is what makes heirloom grains self sustaining and why their microbial diversity far exceeds that of commercially produced kefir.
- Research Backed: Research in the Journal of Dairy Science shows that the bioactive compounds in Kefir may help alleviate inflammatory conditions and support cellular health.
- Verified Genus Groups: Known species identified in kefir grains include Lactobacilli, Streptococci, Lactococci, Acetobacter, and various beneficial yeasts.
- Find out what milk kefir can do for your gut health and overall wellbeing.
NutriBrew Mastery Tip: The Fat Content Factor
To accelerate fermentation and maximize grain health, always use full fat animal milk. The higher fat and natural lactose content provide the essential nourishment required to keep your cultures plump, resilient, and high yielding. Avoid ultra-high temperature (UHT) processed milks, as the altered protein structure can weaken the grains over time.
Master the Craft of Authentic Home Brewed Milk Kefir
Each order contains live, active milk kefir grains submerged in fresh whole milk, ready to begin fermenting within 24 hours of arrival. No activation required.
- Yield: 10 grams of grains will produce approximately 500ml of Milk Kefir every 24–48 hours.
- Growth: Over time, your grains will grow and multiply, allowing you to brew larger batches or share them with friends.
- Simplicity: Simply place the grains in whole milk, cover loosely, and leave out of direct sunlight in a warm room (20°C to 22°C) for 24 hours.
The Bio Activity Advantage: NutriBrew vs. Store-Bought
Milk Kefir FAQs & Troubleshooting
Yes. Our grains are harvested fresh and shipped in a nutrient rich solution that keeps them in a “slowed” metabolic state. They can safely travel for up to 14 days without any loss in vitality.
You could start with 500ml per day. However, because these are live heirloom grains, they will grow and multiply over time. Within weeks, you’ll be able to produce liters of kefir daily from this single purchase.
You only need basic kitchen items: a glass jar, a non metal strainer (plastic or nylon), and a wooden or plastic spoon. No expensive fermenting kits are required to achieve professional results.
Like any living culture, kefir grains undergo a brief acclimation period to synchronize with your local milk and kitchen temperature. This ‘settling in’ phase typically lasts 2–3 batches. As the grains wake up and adjust, their potency will increase with every brew. If you have any questions during this first week, our expert support team are here to guide you.
Master Your Fermentation Journey
Scientific References:
PMC: “Kefir and Its Biological Activities” (2021)
https://pmc.ncbi.nlm.nih.gov/articles/PMC8226494/
PMC: “Kefir: A Potential Gut Microbiota Modulator” (2025)
https://pmc.ncbi.nlm.nih.gov/articles/PMC13111804/
