Vitamin D is an important fat-soluble vitamin that promotes bone mineralization, enhances the immune system, and works as a neurohormone to stimulate proper brain development.
Our son has food allergies and we had his vitamin D levels tested the last time he had a blood draw to test for food allergies. Be sure to get a 25(OH)D vitamin D test before starting any oral supplementation. Our sons vitamin D levels were low and we've increased his oral supplementation accordingly. We'll be getting a repeat 25(OH)D test soon and and may supplement less since it's now spring and he'll be getting more vitamin D from sun exposure.