Genetics can help to decrease oxidative stress or to predict the risk of developing deficiency in diverse nutriments, such as vitamins.
Some examples :
Folate or vitamin B9 is only available through nutrition and plays an important role in the formation of red blood cells and in the healthy growth and function of cells (synthesis of DNA bases, synthesis of certain amino acids, etc); it is crucial in early pregnancy to reduce the risk of congenital malformations of the brain and spine.
Folic acid is the metabolic precursor of an important coenzyme, tetrahydrofolate; its biotransformation involves a specific enzyme (MTHFR). Genetic variant in this gene that forms this MTHFR enzyme is frequent in the general population. This variant is associated with low serum and red blood cell folate levels, as well as with elevated homocysteine levels (a risk factor for cardiovascular disease and cognitive decline). Knowledge of the existence of this variant in the genome of the person can help to decide on folate supplementation, choice of the most appropriate form of supplements (folate vs. folic acid), allow to establish a personalized surveillance of homocysteine levels to prevent development of certain diseases.
Finally, numerous studies have shown that knowledge of our own genetics and the eventual associated risks stimulates to adopt appropriate healthy lifestyle that significantly contributes to an individual wellbeing and longevity.