Your breast milk contains an astonishing living microbiome that helps build your baby’s gut and train their developing immune system to protect them. We developed Byomi, a product that keeps the living microbiome alive in stored breast milk.
Founded by scientists · Women-owned
Oxygen changes breast milk.
When your baby latches, milk passes from you to them without ever meeting the air. Pumping lets oxygen in, and our research found that this exposure sets in motion a deterioration of the living bacteria and vitamins that support your baby’s gut health. Byomi draws that oxygen out of the milk and the air above it, so more of what makes your milk unique reaches your baby.
Mothers conducted a smell test after storage with and without BYOMI, highlighting which smelled better.
chose the milk stored with BYOMI
Difference in how often each word was used, percentage points
Vertical axis: living bifidobacteria, % still viable · horizontal: days in the fridge
*Mean values from our 2026 study currently under peer review.
Every drop of gold, protected by science.
Byomi® Pods have been developed to preserve your pumped milk by creating an oxygen-free environment where its unique microbiome, antioxidants and essential fats like omega-3s, can survive.Drop a pod into the silicone adapter, screw it onto the bottle you already own, and store. Within the first hour the pod has drawn the oxygen out of the sealed bottle, and it keeps working for as long as the milk is stored. Nothing touches the milk.
Research-backed · Easy to use · Fits your bottles
absorbs oxygen
three sizes available
store in fridge
Owned by the female scientists who researched it.
Seven years researching breast milk’s living bacteria at UCL’s Great Ormond Street Institute of Child Health led us to launch BoobyBiome, the baby gut health company built on breast milk science.
biophysics and neuroscience
living bacteria
microbiota preserver
UCL Great Ormond Street Institute of Child Health, London
BoobyBiome is on a mission to reduce infant disease globally, by unlocking the astonishing living bacteria found in breast milk for every baby’s gut microbiome.