Iodine with Sea Plant Complex Dietary Supplement Non-GMO Maintaining healthy levels of vitamin D can help mitigate cognitive decline. Plus, clinical trials confirm the importance of maintaining vitamin D levels for broad-spectrum health benefits, such as bone and immune system health. If you are already getting 1,000-3,000 IU of vitamin D in your multivitamin, Vitamin D3 5,000 IU is perfect for achieving optimal vitamin D levels. Benefits at a Glance Vitamin D helps regulate the body’s calcium balance Supports healthy cell differentiation and immune health Promotes healthy blood pressure already within normal range Supports healthy bone density Perfect complement to multivitamins with 1,000 IU to 3,000 IU vitamin D Vitamin D is fat-soluble, and effects the expression of more than 200 genes in your body. It is essential for optimal health, and yet there is a widespread vitamin D deficiency. You can bring blood vitamin D to optimal levels through repeated sun exposure. But sunscreens and low light in winter make that difficult, and the American Academy of Dermatology has reaffirmed that vitamin D should not be obtained from unprotected exposure to ultraviolet (UV) radiation from the sun or indoor tanning devices. Therefore, supplementing with the right amount of vitamin D goes a long way towards inhibiting vitamin D deficiency.