What is the main idea in this text?
Sometimes too much of a good thing can become a very bad thing indeed. In an attempt to eat a healthy diet, people have been known to overdose on dietary supplements. Vitamin C helps ward off cold viruses. Unfortunately, an overdose of vitamin C—more than 10,000 milligrams on a daily basis—can cause nausea and diarrhea.
A. )Vitamins can cause nausea and diarrhea among health enthusiasts.
B. )Supplements taken in excess can prove bad for your health.
C. )When people like a particular activity, they tend to overdo it.
D. )People who are concerned about their health should take supplements.