As medical marijuana becomes more legal in more states, treatments created from cannabis are receiving increasing attention. Stories on social media present the substance as a cure for a wide variety of diseases and disorders, including cancer. Others say these notions are exaggerated.

Meanwhile, many Americans are also turning to other natural supplements, including vitamins, to help maintain better health. Critics charge most of these nutrients are flushed from the body and wasted. Some suggest a complete diet and exercise are all that is needed for keeping healthy. That may be a challenge for Americans, who are suffering from near-record levels of obesity.

Doc Rob is a naturopathic doctor who has worked with many of the world’s largest health corporations, as well as consumers. An advocate of vitamins and preventative medicine, he works with company seeking to provide natural supplements.