A longevity researcher doesn't take any supplements. Here are his 3 anti-aging habits instead.

Dr. Thomas Rando generally follows the Mediterranean diet and fasts once a week.

Thomas Rando/MonicaNinker/Getty Images

• Dr. Thomas Rando is the president of the American Federation for Aging Research.
• Rando said his longevity research helped him reinforce habits like avoiding ultra-processed foods.
• Rando is an avid runner and fasts once a week while following the Mediterranean diet.

After studying stem cell aging for decades, Dr. Thomas Rando learned that some of the best longevity advice is timeless.