Your dermatologist doesn't know any better than you in this case, though I think he's wrong to be dismissive. This stuff about the gut-skin axis has only been

Your dermatologist doesn't know any better than you in this case, though I think he's wrong to be dismissive. This stuff about the gut-skin axis has only been coming out the last 2-3 years, although there are a few lone researchers who have been thinking this for decades. For myself, I experienced roughly 80% reduction in symptoms after switching to a strict vegetarian diet two years ago, and it's stayed that way.