It is perfectly safe to take Kids Gummies alongside other multivitamin products. For Vitamin D, the general guidelines are a safe upper limit of 50 mcg (2000 IU) daily for children aged 1-101. Each Kids Gummies supplement contains 5µg of Vitamin D3 and 120mg of Calcium. For children aged 1–8 years the upper limit for Calcium is 2,500 mg per day.