NDS Classic, Barrier and Panda: What is the difference?
What the three NDS powders contain according to the label, what the research shows and does not show, and how you can think the choice through.
Gut Health & Microbiome
Gut flora, probiotics and fermentation explained
What trials do and do not show about gut bacteria, probiotics and diet, with sources you can look up yourself. And easy recipes for fermented food.
Articles & Guides
12 articlesThe illustrations for the articles are AI-generated. How I use AI.
CFU and strains: What do the numbers on the tub mean?
Why billions of bacteria are not necessarily better than a few selected strains. How to see through the marketing.
Easy home fermentation: Everyday sauerkraut and kefir
A step-by-step guide to building live bacterial cultures in your own kitchen with just a few ingredients.
Bloated after meals? What research says about the causes
Bloating is rarely caused by too much air or the wrong gut bacteria. On FODMAPs, lactose, constipation and a sensitive gut, and when to see a doctor.
Antibiotics and gut flora: What do probiotic trials show?
How hard does a course of antibiotics hit your gut bacteria, how long does recovery take, and what do trials show about probiotics during and after it?
Who should not take probiotics? What the research says
Probiotics are harmless for most healthy people. But in the seriously ill, inpatients and preterm babies, live bacteria and yeast have been found in the blood.
Gut flora tests: Same sample, seven different answers
When researchers sent the same stool sample to seven companies, they got very different answers. Here is what gut flora tests can do, and what they cannot.
What shapes gut flora, and what about "30 plants a week"?
Genes, diet, medication, exercise or age? What the large studies show about what shapes gut flora in adults, and what the number 30 actually stands for.
Colic and probiotics: What do we know about baby gut flora?
How birth and breastfeeding shape a baby's first gut bacteria, and what trials show about probiotics for colic, stomach infections and premature babies.
Probiotics and IBS: What does the research say?
Over 80 trials have tested probiotics for IBS. Here is what they show, why medical societies give different advice, and what has better evidence.
Prebiotics: the food that feeds your good bacteria
Inulin, resistant starch, FOS and GOS: what the fibres do in the gut, how much it takes, and which are gentle on a sensitive stomach.
The gut-brain axis: What do we know about gut and mood?
Your gut and brain talk to each other, but how much can bacteria affect your mood? What the trials show, and what has still only been shown in mice.
Upcoming book
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I am writing and illustrating a book of easy everyday recipes and knowledge about probiotics. Join the book panel and get previews of the first recipes straight to your inbox.
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