Bloom

A trusty squad of bacteria that gives kids the guts to grow.


  • 4.1bn CFUs of clinically-backed, microbiome-boosting bacteria.
  • Easy-to-swallow liquid formula in a fuss-free dropper
  • Clean ingredients, neutral taste (zero sugar, zero “Ewws”)
  • Strengthens immunity and boosts nutrient absorption
  • Works overtime to keep their growing body and minds in sync


No refrigeration needed. This probiotic plays well (almost) anywhere. Suitable for kids aged 3 to 10 years old.

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  • Cultivates a healthy gut

    A diverse microbiome lays the foundations for long-term health.

  • Strengthens immunity

    Support their natural defenses, starting from within.

  • Boosts nutrient absorption

    Greens a daily battle? A balanced microbiome makes every bite count. 

  • Maintains digestive wellbeing

    For victory laps after every trip to the loo.

  • Supports gut-brain greatness

    Studies show that gut health is directly linked to mood, cognitive development, and overall brain health.

  • Adventure in every drop

    Good habits stick when they’re fun. Bloom shows kids that not all bacteria are bad guys, giving them the tools for a bright, healthy future.

Our vegan formula contains four highly-researched bacteria strains, plus sunflower oil. Made with only the good stuff—no nasties, fillers or fluff. 

Meet the strain squad

Bifidobacterium (BB-12®): Biffy’s the muscle of the crew—strong and steady with 2 billion CFUs to fill the gut with goodness.

Lactobacillus rhamnosus (LGG®): Bubbly, playful and good at standing on one leg, Cilly juggles 1 billion CFUs to balance the microbiome.

Lactobacillus plantarum (PPLP-217™): Packing 1 billion CFU wherever they go, Plan’s always thinking ahead to make sleep and digestion as smooth as possible.

Bifidobacterium infantis (Bifin02™): Small (0.1 billion CFUs) but mighty (sound familiar?), Biffy Jr. builds immune systems you don’t wanna mess with—particularly important in infants.

Plus Sunny

Sunflower oil: Sunny is a gentle, natural oil that keeps the whole squad in check—getting everyone to the gut alive and well, so the strains can do their job.

Each bottle contains a 30-day supply.

Alle Inhaltsstoffe anzeigen

Our non-GMO, vegan formula is free from sugar, dairy, nuts, soy, common allergens, fillers, colourants, gluten, and contaminants.

Drip, drop, done: Dispense 9 drops per day. Any time works, but taking them all at once keeps it simple.

Drip straight from the bottle or slurp from a spoon (remember to count the drops!).

Alternatively, swirl into their favourite food or drink—just make sure it's not hot, or the bacteria will die.

Sprout good habits early on: We recommend building Bloom into their breakfast routine. Just like brushing their teeth, it’s a habit they can stick with for life.

From order to doorstep, we’ll keep you updated at every step of the way. If you’re in the UK, Bloom should pop through your letterbox within 2-3 days from dispatch.

We’ll send you tracking updates by email, and you can check the status of your order anytime via our tracking portal.

  • GLUTEN-FREE

  • NON-GMO

  • DAIRY-FREE

  • SUGAR-FREE

  • NO FILLERS

  • ALLERGEN-FREE

  • NO CONTAMINANTS

  • NO ADDITIVES

  • NO COLOURANTS

  • NUT-FREE

  • SOY-FREE

Why healthy tummies matter

From colds in the classroom to tumbles on the playground, kids face their fair share of scuffs and sniffles. We can’t wrap them in cotton wool—but we can give them the guts to grow big and strong, all by themselves. 

Packed with four clinically-backed, kid-friendly bacteria strains, Bloom helps plant the roots for a thriving life—so active bodies, tough immune systems, and bright, busy minds can blossom.

What Paediatric Dietitian, Lucy Upton, has to say

"Gut health in children is vital for short- and long-term health and happiness.

A child’s gut microbiome plays a key role in immune function, digestion, and even mental well-being, impacting everything from brain development and energy, to mood—and we know science-based probiotic strains are proven to play a crucial role."

We don’t sugarcoat things…

Kids can be picky—but that's no reason to pack their supplements full of sugar.

We use only the highest quality ingredients, with zero additives. For a tasteless formula kids can take with their favourite meal or drink, no monkey business.

Nutrition isn’t child’s play

Not all bacteria are bad guys—but some supplement companies are. Here’s what sets us apart:

We don’t guess, we test. Our formulas are backed by clinical studies for safety you can trust and impact your child can feel.

We work with top paediatric dietitians so you can feel confident you’re making the best, evidence-based choice.

We create products kids will actually take (we’ve got firsthand experience) and even look forward to.

Because some days, convenience is key—and a probiotic can give you extra peace of mind.

We’re rooted in science

  • Sophie Medlin, RD Head of Nutritional Research

    Sophie Medlin is a consultant dietitian, chair of the British Dietetic Association for London, and founder of City Dietitians.

    Sophie Medlin, RD Head of Nutritional Research
  • Lucy Upton Specialist Paediatric Dietitian

    Lucy, a top paediatric dietitian, author, and children’s health advocate, gives evidence-based, accessible guidance to empower families for a thriving future.

    Lucy Upton Specialist Paediatric Dietitian
  • Dr. Tara Swart, PhD Science Advisor

    Dr Tara Swart is an Oxford-trained medical doctor, a neuroscientist with a PhD in neuropharmacology, and Senior Advisor for Neuroscience and Leadership at MIT Sloan.

    Dr. Tara Swart, PhD Science Advisor

From conducting our own studies to working with the world’s leading nutritionists and neuroscientists, we’re known for the rigour and quality we put into our existing products—including our award-winning probiotic for adults, Biotic⁺.

Now, we’re bringing the same big science to smaller tummies. So the whole family has brighter days ahead.

Did you know?

Your gut has two best buddies: your brain and your immune system. 
It works with both to help you fight off germs, learn new things, sleep peacefully, and feel happy.

Frequently asked questions

Nope—aside from supporting absorption, we chose sunflower oil because it’s completely tasteless. Meaning we eliminate the “ew” factor, without using any unnecessary additives and flavourings.

Some kids love taking Bloom straight from the dropper—it makes the habit fun, which makes it stick. If they’re not buying it, just mix into cold drinks or food (hot stuff will kill the bacteria). 

Either way, they won’t taste a thing.

Bloom is specially formulated for kids aged 3 to 10 years old.

It’s NOT suitable for those with chronic gastrointestinal conditions, unless approved by a healthcare professional.

Bloom’s bacteria strains will stay stable if stored in a cool, dry place in the original packaging (no refrigeration needed). 

We carried out extensive testing to make sure each dose of Bloom contains at least 4.1billion CFUs for 18 months from the date of production, as long as you do this.

As parents, we do our best to watch what our kids are consuming. And with seed oils getting a bad wrap lately, you might be thinking: hang on, isn’t sunflower oil bad?

The truth is, there isn’t robust evidence to back this. In small quantities, sunflower oil isn’t inherently “bad” for you—particularly if it’s good quality.

We use high-quality, minimally processed sunflower oil in Bloom to help bacteria survive stomach acid and reach the intestines alive. So the strain squad can get straight to work.

All of our packaging is recycled and recyclable. As a certified B corporation, it’s essential to our mission that our products and packaging are made to be sustainable.

Bloom has a lower CFU count than Biotic⁺. That’s because smaller doses are advised for children and infants, whose gut microbiota is still developing. 

CFU stands for colony forming units, which is how we measure bacteria. It takes billions of bacteria to really make a difference to your gut, so most probiotics have 5-15 billion CFU. 

For adults, Biotic⁺ delivers a minimum of 20 billion CFU—an evidence-based dose for real impact, backed by 380+ scientific studies. 

For kids, Bloom is formulated to deliver 4.1 billion CFU—a dose that’s proven to be safe and effective for growing guts.