Researchers at the University of Hawaii Cancer Center tested stool samples of 858 men and 877 women in Los Angeles and Hawaii with a mean age of 69—regarded as an ethnically diverse study population with varied food intakes. The study found that those with higher quality diets also had significantly better gut bacteria diversity, a factor linked to reduced risk for a variety of diseases. Diet quality and a reduced risk of developing chronic disease is strongly associated with fecal microbial diversity.