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Five benefits of kefir – the ‘world’s healthiest drink’ – from easing Alzheimer’s to skin glow & how to make it for free

Published on April 11, 2025 at 10:55 AM

IF you’re looking for an easy way to give your health a boost, there’s a new viral health drink that is hitting supermarket shelves.

Touted as a gut health fix, with positive links to , and , it’s no wonder this ancient drink is becoming more popular.

Woman drinking from a mug in her kitchen.
Want a taste of the world's healthiest drink? Go for kefir – a fermented milk
Homemade kefir in a jar.
Kefir grains eat the sugar in milk to create a drink that is full of probiotics

is a milk drink that’s packed full of which help promote the good bacteria in your gut.

It's touted as one of the world's healthiest drinks because it is a probiotic, contains calcium, and K, and has a wealth of potential health benefits.

The global kefir market is valued at $2.03billion in 2023. But by 2030 this figure is set to reach a huge $3.45billion.

You may have seen adverts for .

It started in Natasha Bowes' kitchen and is now sold in every major supermarket, with six million customers in the UK snapping it up.

And at the end of last year, Activia brought out a . It had been selling yoghurts and drinks for for decades – but clearly didn’t want to miss the boat on the new kid on the block.

Kefir’s origins date back to ancient times. It comes from the Turkish word meaning ‘keif’ – translating to ‘good feeling’ – and as well as the Middle East, it is widely consumed in Eastern Europe (, , ) and Scandinavia.

Kefir is made by adding milk to kefir grains – which are soft and look a little like grated cauliflower.

The bacteria and yeast in the kefir grains ferment to make a probiotic drink. It tastes tangy and sometimes slightly fizzy. It is thinner than , but thicker than milk.

“Kefir is similar to yoghurt in that both contain beneficial bacteria, however, kefir typically has a more diverse mix of these microbes, which means bigger health benefits,”; says Claire Hitchen, BANT Registered Nutritionist.

Research published in the journal Frontiers in Microbiology has revealed that kefir grains can contain up to 61 strains of bacteria and yeasts, which makes it more probiotic-diverse than yoghurt.

Unsure whether to add kefir to your weekly shopping list? These benefits might just twist your arm.

1. Boosts memory

IN the UK, there are currently estimated to be 982,000 people living with . This figure is set to rise to 1.4million in 2040, according to Alzheimer’s Society.

But kefir is a surprising potential treatment.

Research – done on animals and humans – published in the journal Brain Behavior and Immunity Integrative found that kefir could help treat Alzheimer’s disease, the most common type of dementia.

It’s supposedly thanks to kefir’s anti-inflammatory and antioxidant properties, which are said to offer brain-protecting benefits.

In the study, 13 patients with Alzheimer’s disease were given kefir supplementation for 90 days.

Studies have suggested that regularly consuming kefir seems to increase the levels of beneficial bacteria in the gut

Claire HitchenBANT Registered Nutritionist

They showed a 28 per cent improvement in Mini-Mental State Examination (MMSE) scores, approximately 66 per cent improvement in immediate memory tests and around 62 per cent improvement in late memory tests.

Claire says: “The study is really small and this is really early research but it is promising!

“We know that neurological conditions have a big link to

“By drinking kefir every day and improving your gut health, it makes sense that you can protect and potentially improve existing brain health conditions.”;

2. Better digestion

AT its core, the benefits of kefir are in its probiotic properties.

Probiotics found in kefir can help to , and on several other parts of health.

“Initial studies have suggested that regularly consuming kefir seems to increase the levels of beneficial bacteria in the gut (such as Lactobacillus and Bifidobacterium), while , such as Proteobacteria and Enterobacteriaceae,”; explains Claire.

Kefir grains in a glass jar.
What kefir grains look like. You need about one teaspoon to 3-500ml of milk

For the gut itself, it may , make numbers twos more regular and .

A four-week study, in which patients drank 500ml of kefir every day, found that kefir could help .

In the study, published in the Turkish Journal of Gastroenterology, participants saw an increase in and improved stool consistency.

3. Energy boost

AS well as all the beneficial bacteria, kefir milk has around 9g of protein per 250ml. helps the body with repair processes, muscles, bones, energy and much more.

A 250ml serving of kefir milk also contains a third of your recommended daily calcium intake.

is essential for strong bones and teeth and it supports muscle contractions.

On top of this, kefir contains vitamin D and various B vitamins, which help turn the food we eat into energy.

4. Support your immune system

THE benefits of looking after your gut with kefir goes beyond just the gut itself.

It could also stop you from picking up bugs and illnesses. as many of your immune cells live in the gut.

Claire explains: “Every benefit that kefir has, goes back to the gut.

“Nourishing the gut microbiota with fermented foods like kefir, as well as plenty of , is in turn linked to supporting your immune response.

“This is known as the ‘gut-immune axis’, a term that describes the close two-way communication between the gut microbiota and the .”;

5. Skin glow

WANT to upgrade your skincare routine? Turn to kefir.

Research published in the journal Nutrients has even found that certain probiotics have anti-photoageing and effects.

Plus they can help to beat dry, flaky skin – making kefir a drink of choice for people with , for example.

Kefir has around 30 per cent lower lactose content compared to regular unfermented milk, so it’s considered to be better tolerated

Claire

Claire says: “Studies so far are highlighting a powerful link between the gut microbiome and skin disorders.

“This relationship is known as the ‘gut-skin axis’ and research suggests that an imbalance in the gut microbiome can have an inflammatory effect on skin.

“In theory, if kefir can modulate the gut microbiome, this in turn could benefit skin health and potentially lead to new ways to support skin issues.”;

The problems with kefir…

WHILST kefir is brimming with benefits, it might not be suited to everyone.

“Going from zero to consuming lots of kefir, or other fermented foods, can lead to some digestive symptoms, such as bloating, gas or diarrhoea,” Claire says.

“However this usually eases off after a few days.”

Start slow and steady then gradually increase your portion sizes over a period of a few weeks to give your gut time to adapt.

“Kefir has around 30 per cent lower lactose content compared to regular unfermented milk, so it’s considered to be better tolerated for people who struggle with lactose versus normal milk,”; adds Claire.

Kefir, and other fermented foods, are also high in histamine, which Claire says can trigger hives in people who have a histamine intolerance.

“Reactions are usually only temporary, but if you find it triggers skin symptoms, it may be best to avoid kefir and other fermented foods,”; she says.

Anyone with a milk allergy should also avoid dairy kefir.

Tried & tested

1. Biotiful Kefir Drink

£2.60 for 500ml

BIOTIFUL is the biggest kefir brand in the UK and whilst the plain flavour is delicious, I’m a huge fan of their other flavours including peach, which tastes great mixed with oats or fruit.

If you’re new to kefir, drinking a flavoured variety might make it easier to get used to the acquired taste.

Biotiful Gut Health Kefir Drink, Original.
Biotiful Gut Health Kefir Milk Drink Original

Claire says: “Biotiful Kefir boasts billions of live cultures, however it doesn’t state exactly how many billions of bacteria it provides.

“This may be simply due to the natural fluctuation of live bacteria counts in different batches, and they don’t want to guarantee a certain level that might not be accurate.

“Or it may be that the brand has chosen not to disclose the specific number, or they do not know the specific number.”;

2. Bio&Me Kefir Drink

£2.60 per 500ml

I LOVE the taste of this drink and it’s probably the creamiest one I’ve tried.

It also doesn’t have that tangy, fizzy taste that a lot of kefirs have.

Bio & Me Kefir Drink, Natural, 500ml bottle.
Bio & Me Kefir Drink Natural

Claire says: “Bio&Me Kefir Drink packs in 100billion live cultures, which is the highest level of bacteria compared to other kefir brands.

“It also contains 18 different live culture strains – including strains from the most studied species for their health benefits, Lactobacillus and Bifidobacterium.”;

If you want some extra flavour, this also comes in vanilla.

3. Sainsbury’s Plain Kefir Drink

£1.95 for 500ml

SAINSBURY'S have shown that you don’t need to spend a fortune to reap the benefits of kefir.

This supermarket version is creamy and smooth, costing far less than some of its competitors.

Plus, according to the label, it packs in “over five billion” live cultures and 14 different bacteria strains, which Claire says is a strong number.

Sainsbury's plain kefir drink bottle.
Sainsbury’s Kefir Plain Drinking Yogurt

She says: “The Sainsbury’s kefir doesn’t contain artificial flavourings or sweeteners, which is great.

“This product also has added inulin, a type of prebiotic that feeds beneficial gut bacteria.

“This addition could bring some health benefits, however, it may have also been added to thicken the texture and make it more enjoyable, as well as improving shelf life.”;

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