Orange-Flavored Vitamin D3 Gummies More than just for bone health Naturally Sweetened Easy to get higher potencies Vitamin D3: Preferred Form of D What Does Yum-Yum D3 Gummies Do? Jarrow Formulas Yum-Yum D3 Gummies deliver 10 mcg (400 IU) of vitamin D3 (cholecalciferol) per serving in a delicious gummy. Vitamin D3 is of critical importance throughout the bodies of growing children (and adults), helping the body to absorb calcium for strong bones, and promoting the health of muscles, skin, brain and the immune system.