Orthorexia is a condition involves rigid
eating eating which includes
not touching sugar,
salt, caffeine, alcohol, wheat, gluten, yeast, soya, corn and dairy foods -- Is this you, Rocker?
http://www.telegraph.co.uk/health/healthnews/6038301/Rise-in-orthorexic-eating-disorders-sparked-by-healthy-food-obsession.html
Apparently, this obsession may lead to these folks becoming malnourished.