 strong. Then men and women in their 30s, you're talking about heart health, immunity, cardiovascular problems start to turn on, but it's also the child rearing years and vitamin D for pregnant women is very, very important. People in their 40s, that's when you start feeling more of those aches and pains like you've never felt before. You think you're getting older. And again, it's important for your hormones and to keep yourself physically active.