Vitamin D3 also known as cholecalciferol, is a fat-soluble vitamin that plays a crucial role in calcium and phosphorus absorption, bone health, and immune system function. Vitamin D3 deficiency can lead to conditions such as osteomalacia in adults. Minoxidil chewable tablets (Grow by MangoRx) contain 2000 iu of Vitamin D3. Source: MedicalNewsToday.com, MedHair.co