Vitamin D has a positive effect on the body in several ways. According to Healthline, has been shown to strengthen your immune system and help with depression (which is currently vital, with a permanent pandemic). Vitamin D can also fight certain diseases, such as the flu, MS and heart disease, promote weight loss and – because it helps absorb calcium – is thought to help promote healthy bones, muscles and the oral cavity.
Unfortunately, because vitamin D mainly comes from significant amounts of sun exposure, many people – especially adults in the northern hemisphere – do not get enough vitamin D from the sun. Those who lack vitamin D are often tired, sick, and more prone to getting sick. Vitamin D deficiency is also associated with bone and muscle pain, and sometimes even stress fractures.