HI A.!
My daughter has a rare disease that causes allergic reactions to who knows what?!?!?! We do know some of her triggers are Red 40 and Yellow 5&6 which is in a lot of vitamins amongst lots of other things including some preservatives. Maybe that is what is causing it?
What we have found and works for us is the Trader Joes Childrens Chewable Vitamins/dietary supplement and also Lil Critters makes one (We get the zinc and echinacea one for immunity booster)- I believe we got this at Trader Joes although I have seen it at Walgreens. The Lil Critters one says on there....This product contains no artifical colors, flavors, preservatives, wheat (gluten), milk, eggs, shellfish, tree nuts, peanuts or soy. (the ingredients do say fractionated coconut oil though)
Also, if you find that she is itchy there is a great recipe for lotion at www.mastokids.org It is on the left hand side of the page called Magic Masto Lotion. This is what we use on everything for my daughter since she has Mastocytosis. We LOVE it and what it does to help her skin!
Hope you find something that she can take! Blessings to you and yours!
- T.