True for me.
I have been diagnosed food intolerance for basically everything I eat. This is caused by my gut’s disability to produce various enzymes that normal gut would produce. This means that when I eat, the food isn’t digested completely and this half-digested food enters my blood stream. That kind of food acts as poison.
After each meal I can feel tiredness. It also effects my nervous system: it’s very hard to concentrate and my reaction times are very slow. I just don’t want to think or do anything, just sleep.
But taking probiotics (which I have previously planted in my homemade yoghurt, so they can muliply) before mealtimes makes these symptoms go away.