Narrator: This is Science Today. Nutritional guidelines used to be set in terms of a universal diet for everyone. But Christopher Vulpe, a nutrition and toxicology professor at the University of California, Berkeley, says researchers are finding one's genetic make-up is going to play a bigger role in what foods and supplements they should consume.
Vulpe: I think of them in sort of the old idea in taking it from Popeye - the strong to the finish because I eat my spinach approach, which is that your diet really determines whether you have good health or whether you're going to develop a disease and we've tried to come up with these dietary recommendations that would fit every person.
Narrator: Instead, Vulpe says both genetics and diet determine one's health.
Vulpe: You know, obviously if you eat hamburgers every day you're probably going to get heart disease, but someone may get heart disease at thirty whereas someone else may get heart disease at fifty. So, I think it's a combination of what you eat and your genetic predisposition to develop that condition.
Narrator: For Science Today, I'm Larissa Branin.