I introduced some solids when she got her teeth. She got two teeth at 5 months. She is a few weeks shy of one year old now and has 8 teeth total. We give her a mostly all natural diet. Lots of veggies & fruits. No high fructose corn syrup or added sugar. No sugar substitutes either.
She was on formula (I read somewhere a while ago that using soy for long periods of time will mess up your digestive track even in adults, so I've been skeptical about using it for her) after breastfeeding for under two months. At 9 months, she refused to drink any more formula. If you've ever smelled the formula, you might understand why she'd start refusing it- it smells like vomit!! So, I switched her to cow's milk 2% a little after 9 months. I just couldn't get her to drink any more formula, so cow's milk was pretty much our only option.
The pediatrician said the only reason they ask people to delay until after 12 months is to ensure they get all the fats and vitamins they need while still so young. Cow's milk doesn't have nearly as many nutrients as breast milk or formula, so they worry the kids won't get the fats they need for their brains and bodies to continue growing. I've never heard of any links between cow's milk and type 1.
Like others have stated, I doubt there's a solid connection. We did 1% milk in my house growing up, and I'm the only one in my entire bloodline to have type 1- diagnosed at age 14. There are many theories, but nothing is solid. There is another study out since 2011 linking c section births with increased type 1. Unfortunately, my baby was delivered via emergency c section because both her and me were in danger of dying due to pre eclampsia. So, regardless, I didn't have a choice. I didn't put much merit in that study anyway. Just mentioning that there are many many theories about where type 1 comes from, but nothing is certain. I'm not going to change my parenting tactics unless there is substantial proof or evidence to suggest a theory is accurate.
So far, I haven't found any theories that I believe caused type 1- besides a sickness that the child overcame recently before diagnosis. Then again, what teenager's growing body riddled with hormonal changes ISN"T going to have some sort of sickness? So, that theory only works if someone is pre-disposed to having a lowered immune system and type 1 diabetes somewhere in the genes?
I'm trying not to let the immense fear of my kids getting type 1 rule my life.