it is probably the lactic acid in all fermented foods that Peat has a problem with. and he may be right about having too much.

i have cut down on my yogurt/buttermilk consumption and gave up fermenting vegies, etc more than a year ago...although, i don't make myself crazy and eat some if it is served or desired(sauerkraut w brats, maybe).

i am not familiar w yakult but i will ask him about it since he lived in japan for a number of years and still has many family members there.