| Its sometimes difficult to tell the difference between health facts and myths, particularly around complementary and integrative health. Learning about scientific concepts related to health research can help. For example: The strongest evidence about whether a treatment is useful and safe consists of results from several studies by different investigators. Rarely does a single study provide a final, definitive answer. Studies with large numbers of people generally get results that are more reliable than those of smaller studies. Larger studies can increase accuracy and reduce the probability that any effect observed in the study was due to chance. When it comes to medicine, there is no official definition for the term natural. And its important to know that natural doesnt always mean safe. | 