Cmpi now showing signs of soya allergy after previously being fine?

[Poppybella2015]

My 2.5 year old has cows milk protein intolerance which gives her chronic constipation. We have been dairy free for one year now. She originally had one cup of chocolate coconut milk a day but went off this so started having one cup of soya milk a day. She has been fine on this but I recently upped her to 2 cups of soya milk a day to up her calcium intake and now she is suffering chronic constipation even though we have stopped the soya milk. Could she now be allergic to soya?

My son (20 months) is also CMP allergic and had been on soya supplemented with breast milk. Once I gave up breast feeding and upped his soya, he started having terrible diarrhoea. After 8 weeks of it and trying all sorts of things, I called his dietician who said 45% of kids with CMPI develop soya intolerance/suffer gastro problems with soya when the dose is increased (so therefore you can't really test for it as it's about quantity..)
Slightly staggered that we weren't told this to begin with….He's now on Oatly exclusively. They need less calcium than you think (according to dietician) esp if you're giving it to her in sauces, breakfast, pancakes etc. Hope helpful.

Thank you. Should I cut out all soya now (In bread, biscuits etc) or will just cutting out the soya milk be enough?

Given it's about quantity, I think you should be fine with just cutting out milk. Oatly and Koko (UHT one apparently) taste so much better than soya anyway and don't have any of the sugar that soya has so hopefully she'll like it.