Kefir Health Benefits: Understanding the Evidence

What is milk kefir?

Milk kefir is a fermented milk drink. Microorganisms involved in fermentation change the milk’s flavour and texture. Products differ in their cultures, ingredients and processing, so findings about one kefir should not automatically be applied to another.

Live cultures and probiotics

Fermented foods and probiotics are related but distinct concepts. Describing a food as fermented does not establish a specific health benefit. Claims about probiotic effects need relevant evidence and information about the organisms and finished product. ISAPP consensus statement on fermented foods.

What does human research show?

A 2014 pilot study followed 20 adults with constipation who drank 500 mL of kefir daily for four weeks. Several bowel measures improved, but the study was small and lacked a controlled comparison. Its authors called for controlled trials. This amount is a research protocol, not our serving recommendation, and the study did not test Hale & Worth products. Turan and colleagues, 2014.

Nutrition and product information

For the ingredients, allergens, nutrition and serving information of a Hale & Worth flavour, use its current approved product information. Do not substitute figures from a generic kefir article for the values of a specific product.

Putting the evidence in context

Research findings depend on what was tested and how the study was conducted. Laboratory results and preliminary human studies do not establish that a retail product treats or prevents disease. We present this information for education; it does not replace individual medical advice.

Explore our whole milk kefir range or read the FAQ for practical ordering information.