Genetic-guided nutritional supplementation therapy in personalized medicine is the type of treatment that prevents and acts against errors during the copying process of a cell's deoxyribonucleic acid (DNA), mistakes that lead to diversification in the DNA sequence at certain locations, called single nucleotide polymorphisms (SNPs). Positive results are quickly achieved using one of the four types of therapy. These types are: personalized, when individual human genetic variations drive individual treatment, preventive, with a tailored healthcare strategy and therapeutic preventive drugs and vaccines, participatory, when empowered patients make informed choices and take responsibility of their own health and predictive, using a proactive approach to health and medicine.