It's the lifestyle thing which is so hard to take, isn't it? A slippery slope. There's the whole thing of dairy too...
E was almost completely formula fed, certainly all from 6 weeks....
Well...we didn't have double glazing until recently, if that counts for anything! And the house is always, ahem, pretty dust-laden. I can see conditions like asthma and eczema being more prevalent in 'sterile' environments -- but these are not auto-immune conditions; they are reactions to external allergens. Diabetes is not that.
Hmm. I look at my daughter: 10lb 4oz at birth, planned C-section, formula from 6 weeks. Not as large, admittedly, in early babyhood. Sigh.