In his book What the Bible Says About Healthy Living, Rex Russell, M.D. states the following:
Scripture and medical research agree that modern lifestyles lived without reference to God’s laws and design shorten life and hasten death. It has been reported that in the early twentieth century, a people in the Himalayas called the Hunzas had an average life span of 90 years, and often over 120 years. When a medical team led by Dr. Robert Garrison studied the Hunzas in the 1940s, the physicians did not find a single case of cancer, ulcers, appendicitis or colitis. Heart disease and hypertension were unknown among them. The medical experts also found that the Hunza people ate nuts, grains, vegetables, fruits and legumes. The team could only conclude that the Hunza’s life expectancy was based on clean water and exercise—and to their adherence to a diet very much like the one described in Genesis 1:29.” In 1949, the Hunzas were incorporated into Pakistan, and their life span has since been shortened because of changes in diet.
The bottom line is this: What you eat makes a difference in your health.