NeuroSun provides 1000 IU of vitamin D per bottle.
Vitamin D3 (cholecalciferol) - Vitamin D can be obtained from sunlight, but is also commonly found in fatty fish, fortified milk and cereal, as well as egg yolks. In the last decade, research has demonstrated a much broader role for vitamin D than just supporting calcium absorption and bone health. Vitamin D is a very important part of the nervous system, with many vitamin D receptors located on both neurons and glial cells in the brain. Emerging research demonstrates a role for vitamin D in neuroprotection and neurotransmission. The immune system is also supported by vitamin D, where the vitamin plays an important role in supporting the innate immune system - your everyday defense shield. Recent trends indicate many populations in the United States have insufficient levels of vitamin D. In the last ten years alone, serum vitamin D levels have fallen on average approximately 20% (1). †
(1) Ginde AA, Liu MC, Camargo CA Jr. (2009). Demographic differences and trends of vitamin D insufficiency in the US population, 1988-2004. Archives of Internal Medicine, 169:626-632.