One of the most important nutrients for good health and longevity is vitamin D, says endocrinologist Olga Pavlova.
The doctor said: three vitamins are of particular importance when the question arises of what helps people maintain an actively functioning body with age and prolong life. Pavlova considers vitamin D, vitamin B12 and vitamin C to be these “key ingredients” of longevity.
Vitamin D.The endocrinologist noticed that adequate intake of this substance helps maintain a healthy sensitivity of body cells to insulin, which, in turn, prevents the appearance of endocrine disorders, diabetes. In addition, vitamin D has an effect on the regulation of the nervous system, and its normal content correlates with good neurological health, the absence of depression. In addition, the functioning of the thyroid gland depends to a large extent on its intake by the body.
Vitamin B12. Pavlova explained that it is a key nutrient for maintaining healthy neurological functions –
“responsible for the emotional background, memory, speed of thinking.”
But B12 is important not only for a smoothly functioning nervous system – the state of the thyroid gland, as well as how the cardiovascular system functions, depends on its concentration in the body.
Vitamin C. The contribution of this vitamin in life extension is determined by its positive effect on the state of blood vessels and the heart, the immune system, and skin. Pavlova clarified that it is more expedient to receive vitamin C regularly in small doses, so it is better absorbed by the body.
Summarizing, the endocrinologist said that adults should check the content of vitamins in the body using a blood test – this is the most effective a way to find out if the body is deficient in important nutrients, and if so, how significant. Vitamins should be obtained primarily from food.
Earlier, MedikForum.ru portal wrote about what foods protect the body from oxidation, thereby reducing its susceptibility to cancer. 
Olga Pavlova healthy lifestyle doctor -endocrinologist