Final answer:
According to Vaillant and Mukamal, the health habits that people have during their early adulthood (25 to 30 years of age) greatly affect their health, happiness, and life expectancy years later.
Step-by-step explanation:
According to Vaillant and Mukamal, the health habits that people have by the time they are 25 to 30 years of age will greatly affect their health, happiness, and life expectancy years later. This period of life is known as early adulthood.
During early adulthood, people generally form intimate relationships, complete their education, and start a career. They are also at their physical peak and usually in good health. It is a critical time to establish healthy habits that can impact long-term well-being.
Research shows that positive health behaviors during early adulthood can have long-lasting effects on overall health, happiness, and life expectancy in later years.