Well, I've dowsed before and just dowsed again... and that's what I've got.
Eggs exacerbate facial seborrhoeic dermatitis (FSD)(dandruff)? - No
Homemade yogurt exacerbates FSD? - No
Homemade Kefir exacerbates FSD? - No
Cheddar cheese (extra mature) exacerbates FDS? - No
I got a yes for all the above that they are beneficial for me.