If there is one true thing about the current state of humanity is that our current lifestyles are so far removed from our natural ones to be almost unrecognizable. We do not exercise nearly enough, we work sitting in front of a computer most of the day, we do not partake in nature often if at all, and our diets are lacking many essential nutrients and vitamins.
If you want to lead a healthy lifestyle you should fix at least one of these issues, to turn your life into a more “natural” one. Small steps go a long way to lead you to the healthier life you are seeking: start by not eating meat for one day a week, for example; or by taking the stairs instead of the elevator any time you can.
Add multivitamins to your diet, and try to visit a natural place during weekends: a forest, a beach, a lake…