Vitamin A has been known as an infection fighter and also may help increase the body’s immunity. Vitamin A is essential for vision by allowing light to transmit into the eyes. Poor vision and increased night vision may be improved with regular supplementation of this beneficial nutrient.
Vitamin A assists with bone growth and may help the skin maintain a youthful appearance by diminishing the appearance of age spots and wrinkles.
Vitamin A is a powerful antioxidant which helps to destroy free radicals in the body. These damaged and unstable cells circulate in the body, attach to healthy cells and rapidly multiply creating the proper environment for tumors and cancer. Some research studies suggest that Vitamin A, in the form of beta-carotene, may reduce the risk of developing certain kinds of cancer.
Vitamin D is necessary for healthy brain function. A 2009 study conducted by the University of Cambridge and lead by David Llewellyn found that subjects with the lowest levels of this healthy nutrient were twice as likely to suffer impaired cognitive function. Llewellyn divided the 1,700 subjects into four groups: severely deficient, deficient, insufficient and optimum, based on their Vitamin D blood levels. The study suggests that the higher the level of Vitamin D correlates with increased cognitive function. A similar study by the University of Manchester involving 3,100 subjects suggests that those with lower levels of Vitamin D exhibited slower information processing speed. Impaired cognitive ability is a precursor to diseases such as Alzheimer’s and dementia.
Vitamin D may also affect the heart’s overall health and pumping ability, thus helping to decrease the risk of heart failure. The nutrient is also necessary to maintain healthy bones and to aid in calcium absorption along with healthy nerve function.
Vitamin D can be obtained naturally by spending 15 to 30 minutes exposed to the sun, a few times per week. Natural absorption of Vitamin D may be affected by skin color, skin exposure, geographic location and sun block. Supplementation is an easy way to get the recommended daily allowance.