"Jarrow Formulas® Vitamin D3 (cholecalciferol) may help improve vitamin D status better than equivalent amounts of ergocalciferol (D2).* D3 is also the form produced by skin with UVB exposure (sunlight). Vitamin D3 is converted to its hormonally-active form, calcitriol, which enhances dietary calcium and phosphorous absorption, supports the production of osteocalcin (a structural protein in bone), and stimulates the vitamin D receptor in innate immune cells to support a healthy immune response.*"

NOTE: Individuals consuming more than 2, 000 IU/day of vitamin D should periodically obtain a serum 25-hydroxy vitamin D measurement. If you have a medical condition (especially kidney stones or dysfunction, hyperparathyroidism, hypercalcemia, lymphoma, or sarcoidosis), are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product.