Vitamin A and Beta Carotene – What, How, When, Why to Supplement
In a review study, five out of seven studies showed an inverse relationship between the serum 25-hydroxyvitamin D level and cardiovascular disease. The prevalence of coronary heart disease is higher in Oz Vitamins Better Eyes Supplement those with a low serum 25-hydroxyvitamin D concentration than those with higher levels. Supplementation with vitamin D did not result in any beneficial effect on risk factors for cardiovascular disease and no benefit was appreciated after increasing the serum 25-hydroxyvitamin D concentration from 23 ng/mL to over 40 ng/mL.
Vitamin D and Other Diseases
Diabetes is linked to vitamin D. The link between vitamin D and diabetes mellitus type 1 was discussed above. Low vitamin D levels are associated with type 2 diabetes. Higher levels of vitamin D intake are associated with a lower risk of type 2 diabetes. Despite these correlations, interventional studies with vitamin D have not demonstrated that vitamin D supplementation reduces the risk of diabetes.
Vitamin D is important for brain development, so it may be linked to psychopathology. Low levels of serum 25-hydroxyvitamin D have been shown to be present in those with Alzheimer’s disease and depression. These studies do not demonstrate that low levels of vitamin D are the cause of these conditions.
Low levels of vitamin D may increase the risk of death. Even though there is an association between vitamin D and all cause mortality, it is unclear if this increased risk of death is strictly related to the vitamin D deficiency or simply overall poor health status. Some studies suggest that cancer patients have a reduced risk of mortality with a higher vitamin D level, but other studies showed no association between cancer death rates and serum 25-hydroxyvitamin D concentration.