The following Benefits of Vitamin D Supplementation is Summarized from the Mayo Clinic
Strong Scientific Evidence Supporting the Use of Vitamin D Supplementation
Vitamin D Deficiency
This is associated with many conditions, including bone loss, kidney disease, lung disorders, diabetes, stomach and intestine problems, and heart disease. Vitamin D supplementation has been found to help prevent or treat Vitamin D deficiency.
Osteomalacia (bone softening in adults)
Adults who have severe Vitamin D deficiency may experience bone pain and softness, as well as muscle weakness. Osteomalacia may be found among the following people: those who are elderly and have diets low in Vitamin D; those with problems absorbing Vitamin D; those without enough sun exposure; those who undergo stomach or intestine surgery; those with bone disease caused by aluminum; those with chronic liver disease; or those with bone disease associated with kidney problems. Treatment for osteomalacia depends on the cause of the disease and often includes pain control and surgery, as well as Vitamin D and phosphate-binding agents.
Good Scientific Evidence Supporting the Use of Vitamin D Supplementation
Much evidence has shown that Vitamin D helps prevent cavities.
Many studies suggest that Vitamin D helps prevent falls, especially in people who live in care facilities.
Vitamin D deficiency has been linked to muscle weakness and pain.
Vitamin D and calcium are used to treat people with osteoporosis, especially after a fracture, as well as to prevent osteoporosis in people who have endocrine or nutrition problems.
Scientific Evidence Supporting the Use of Vitamin D Supplementation Has Been Reported. However, Further Studies Are Suggested.
People with asthma may have an increased risk of Vitamin D deficiency. Vitamin D may help reduce inflammation, decrease asthma severity, and improve treatment.
Vitamin D may reduce inflammation and help prevent autoimmune diseases, including rheumatoid arthritis, multiple sclerosis, and Crohn's disease. Cancer prevention (breast, colorectal, prostate, other)
Many studies have looked at the effects of Vitamin D on cancer. Positive results have been reported with the use of Vitamin D alone or with calcium. Vitamin D intake with or without calcium has been studied for colorectal, cervical, breast, and prostate cancer. A reduced risk of colorectal cancer has been shown with Vitamin D supplementation.
Higher blood levels of Vitamin D are associated with better mental performance in people with Alzheimer's disease. Weekly dietary intake of Vitamin D has been linked to better mental performance in older women.
Vitamin D may benefit fertility. However, more study is needed to understand its potential effects on pregnancy completion and live birth.
Conflicting results have been found on the use of Vitamin D for fracture prevention.
Studies have suggested that Vitamin D levels may decrease after a hip fracture, and that Vitamin D may help improve these levels.
High blood pressure
Low levels of Vitamin D may be linked to high blood pressure. Blood pressure is often higher during the winter season, at a further distance from the equator, and in people with dark skin pigmentation.
Early research suggests that Vitamin D and similar compounds, such as alfacalcidol, may impact immune function. Vitamin D added to standard therapy may benefit people with infectious disease.
Intake of Vitamin D may be linked to a longer lifespan.
Inflammatory bowel disease
Studies on the use of Vitamin D for inflammatory bowel disease are limited. Early evidence suggests benefit for people who have Crohn's disease.
Research suggests that intake levels of calcium and Vitamin D aimed at preventing osteoporosis may help prevent teeth from falling out.
Some studies suggest an association between low Vitamin D levels in the blood and various mood disorders, including depression, seasonal affective disorder, and premenstrual syndrome. Also Vitamin D supplementation may improve symptoms of depression associated with seasonal affective disorder.
Multiple sclerosis (MS)
Vitamin D may have a protective effect on the risk of developing MS. A link has been suggested between low Vitamin D and MS risk.
Evidence is mixed regarding the effect of Vitamin D on strength in the elderly.
Some studies suggest potential benefit for birth weight, length, and weight, as well as reduced risk of diabetes during pregnancy.
Seasonal affective disorder
This is a form of depression that occurs during the winter months, possibly due to reduced exposure to sunlight. In one study, Vitamin D was found to be better than light therapy in the treatment of this disorder.
Vitamin D has been studied for sexual dysfunction.
Higher levels of Vitamin D may decrease the risk of stroke.
Type 1 diabetes
Some studies suggest that Vitamin D may help prevent the development of type 1 diabetes.
Type 2 diabetes
Vitamin D has mixed effects on blood sugar and insulin sensitivity. It is often studied in combination with calcium.
Vitamin D deficiency (infants and breast feeding mothers)
Early studies suggest that Vitamin D may benefit both breastfeeding mothers and their babies.
Weight gain (in women with menopause)
Vitamin D and calcium may have an effect on weight gain in women undergoing menopause. Evidence suggests that this may be particularly true in women consuming inadequate calcium.