I limit dairy in my own diet. It's not completely eliminated, but I don't buy cow's milk. It helps with GI problems, which have so far been unidentified, but I'm positive dairy is one of the culprits.
My daughter is also on limited dairy. She gets all the nutrients she would normally get from cow's milk from fortified soya or oat milk and I give her a supplement as well. She was accidentally on a dairy free diet a few months ago. She had been getting some at school, which I was OK with. But, unbeknownst (I can't believe that's a real word, but I googled it and it is
) to me, the school had temporarily stopped providing the milk. Her behaviour improved an awful lot and, seeing as this was a blind trial, I'm pretty certain it wasn't the placebo effect. So we have tried to stick with it.
Gluten is a topic which crops up over and over again on here. I hope to eventually go GFCF and the same for my daughter, but I find the dairy free a bit of a struggle as it is. I've heard of the benefits of it (for some anyway) and it can do no harm to at least try it out, so long as you maintain a balanced diet, which is perfectly attainable.
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"We act as though comfort and luxury were the chief requirements of life, when all we need to make us really happy is something to be enthusiatic about." Charles Kingsley