Hi @CarolTN I haven't been diagnosed with seborrheic dermatitis but as @Scott Adams says, like a lot of coeliacs I do suffer from itchy skin, and now adult onset eczema. The latter started during one of the lockdowns.  I find my skin is often itchy if the temperature changes from hot to cold or cold to hot, that seems to set it off. This time of year is bad,  I also get an itchy throat, so maybe pollen is having some effect. I am not sure where you live but here I'm mentioning the products I buy in the UK that help me - they may be available where you live? For my scalp, I have used with some success Neutrogena T-Gel, but I think Philp Kingsley's products for flakey, itchy scalps are amazing. I've used the shampoo and the toner. For the rest of my skin, I use something called Adex Gel after I have showered, and then any really itchy patches I treat with Betnovate, a steroid cream, 20 minutes later, as suggested by a doctor. I currently have some very stubborn patches around my waist, no idea what they are - Canesten anti-fungal cream makes them worse, so does Betnovate.  But when I rub the patches, they disappear, i.e. blanch, which apparently classic for dermatitis.  It's a constant challenge! When I first got eczema I had given up chocolate and was eating cakes which contained almonds.  My blood tests showed the markers for eczema were elevated at that time - the  IgE.  I felt there might be a connection. So you  may find something in your diet isn't helping the situation, other than gluten? Cristiana      

Yes it is.  So I try to buy block only, but still watch for it.

I believe it is also commonly used in pre-grated parmesan cheeses, like Kraft's.

Thank you so much! This is helpful, just to know. Over the years, I’ve seen the scope and understanding of the disease broaden. In some ways, I think it’s remarkable a doctor in Oregon way back then could diagnose a baby he’d never met so quickly. I wish I’d asked more questions!! 

Yes mostly found on RX pill capsules and store bought shredded cheese are the worst for me.