What you eat also has a major impact on the expression of your genes. That’s why it is useful to know what reactions are sparked by our eating habits. Companies like Omnigen and Habit respond to this by offering personalised diet advice based on your DNA - you’ve undoubtedly noticed that the diet that works for your friend doesn’t necessarily work for you.
In addition, DNA research is often used in professional sports. Do you have weak reactions or variations in your genes that make you susceptible to injuries? Then DNA analysis will determine which nutritional supplements are ideal for you.