We all age differently (IMAGE) University of California - Berkeley Caption People age differently, including former presidents. Ronald Reagan developed Alzheimer’s disease in his late 80s and died from complications of the disease at the age of 93. Franklin Roosevelt, shown at 62, died of a brain hemorrhage at the age of 63. Jimmy Carter, shown in 2019 at the age of 95, has suffered from cancer but is now 98 years old and still active. Our genetics, the environment and our age all play important roles in our health, but which of these is the most important? A new UC Berkeley study suggests that in many cases, age plays a more important role than genetics in determining which genes in our bodies are turned on or off, influencing our susceptibility to disease. Credit UC Berkeley Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.