The research on the benefits of multivitamins in warding off chronic disease is mixed. While there is some research to show that people who take a multivitamin have better health, it is hard to draw conclusions from this research. Most research on multivitamin use and chronic disease is observational. This kind of research relies on participant reporting, which is not always accurate. Additionally, it has been shown that people who take multivitamins also exhibit other healthy behaviors like eating a well-balanced diet, exercising, and not smoking. Therefore it’s difficult to conclude that multivitamins are the factor improving health.