This interesting radio 4 programme was posted on Thyroid UK. Various scientists describe their research on microbes in the gut and how important the complex chemistry between the food we eat and these microbes may be for the immune system to distinguish between our own good bacteria and other outside bacteria.
Olive oil is said to be the perfect food for our microbes.
(Skip the first quarter if you're squeamish) :
That Gut Feeling: Part Two
Dan Saladino returns to the world of the gut microbiota, the vast array of microbes within us all.