Narrator: This is Science Today. Researchers at the Lawrence Berkeley National Laboratory have conducted a study of twins that found that no matter what lifestyle a person chose, whether active or sedentary, genes played an overriding role in their cholesterol response. Paul Williams, who led the study, said now is the hard part.
Williams: Which is, among all the genes that could potentially be involved – some of which we know, some of which we don't know – trying to find that which could explain such a high correlation between the two twins.
Narrator: In the meantime, Williams says the same dietary recommendations may not be appropriate for all individuals.
Williams: If we can find the genes that seem to be able to make one susceptible to lowering dietary fat, then we might be able to target the interventions. We may say, you look like a good candidate for lowering your dietary fat and lowering your LDL cholesterol. To other people, we might be able to recommend that other approaches are required and that diet is not likely to be beneficial.
Narrator: The researchers will next conduct a larger study involving 400 sets of twins. For Science Today, I'm Larissa Branin.