Vitamin D is a fat-soluble vitamin. Commonly known as the sunshine vitamin, vitamin D is unique because the body can produce it through exposure to sunlight. However, the bodys ability to produce vitamin D is affected by many factors, including avoiding the sun, making vitamin D deficiency common. Vitamin D is only naturally available in fatty fish, egg yolks, and mushrooms. Mushrooms are the only vegan source; however, the amounts depend on how much ultraviolet light they are exposed to by farmers. They also lose 20 to 40% of their vitamin D after a week of storage. Instructions: Adults who prefer chewable tablets due to swallowing difficulties or who want to enjoy the pleasant orange flavor. Those concerned about vitamin D deficiency and insufficiency Those who want to support their immune system Those concerned about bone health Composition 1000 IU of vitamin D3. Instructions for use Chew 1 tablet a day. Pharmaceutical advice Easy to ingest, it offers the same benefits for bone health as regular vitamin D3.