Jill: From a mother-to-mother perspective, I started my son on digestive enzymes at 16 months old, and had I have known about them earlier & the positive effect they would have I would have started them earlier. I'm wondering if this product says best for children over 3 due to the effervescent fizzing action? If you have any concerns run it by your doctor before starting to use them. Best wishes, I hope they help.