Traditionally, DNA testing has been used to identify individuals and / or confirm the biological relationships. However, DNA testing continues to gain popularity and becomes more widely available, other applications are being identified.

Clinical nutritionists are using DNA tests to help to identify the genetic predispositions of their patients and create individualized meal plans. Only a small sample, a swab of the inside of the mouth of patient, can reveal a wealth of information about that patient's genetic defects that may contribute to poor health and disease. Laboratories that specialize in genetics for disease prevention and nutritional supplementation (called nutrigenomics) can analyze DNA SNPs (single nucleotide polymorphisms), which are biochemical markers for health and disease. Approximately 200,000 SNPs of genes and their functions are listed in the National Center for Biotechnology Information (NCBI) and has been investigated by the public and private universities and institutions worldwide.

Some of the hereditary risks can be identified are cancer and the risk of inflammation, the absorption of vitamin D, osteoporosis and insulin resistance. DNA tests can also detect the VDR gene, or vitamin D receptor, which is responsible for about 75 percent of the genetic influence bone density and protein synthesis in tendons and ligaments. Individuals with variations in this gene in particular tend to have lower bone mineral density and weak muscle strength. In turn, these individuals are at higher risk of osteoporosis.

Before DNA testing, it is difficult for clinical nutritionists to determine whether a patient's diet, lifestyle and stress, or genetic makeup is contributing to their illness or predisposition. For the introduction of DNA tests on a nutrition program based on lifestyle, it is now easy to formulate a food track based, mostly-organic nutritional supplements based on DNA results of their patients and lifestyle factors. Using this new approach, nutritionists are now able to provide individualized meal plans for weight control, anti-aging, sports nutrition and disease management and prevention. Personalized nutrition programs and services based on DNA and lifestyle factors are well received by most patients and market today, and with Many health conscious individuals. In addition, these programs are not restrictive diet, which helps increase patient compliance.

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