gluten-free Dandruff Shampoo in Parents, Friends and Loved Ones of Celiacs Posted April 17, 2009 · Report to Admin my 7 yr old boy had this, teachers would think it was lice before they looked closely. I read somewhere that it's often yeast-related. We have had good success clearing it up (still has a little, but much less and it's continually diminishing) with him eating spoonfuls of extra-virgin coconut oil and putting it on his skin and occasionally scalp after a shower and giving his hair a good brush when it's wet (to loosen). When I've put it on his scalp he looks like a little grease slick, so it gets washed out before leaving the house! It's expensive stuff, but quite delicious.