Dr. Joseph Mercola is an American osteopathic physician and alternative medicine advocate. He is best known for his website, Mercola.com, which promotes various health products and alternative treatments. Mercola has gained a significant following for his views on nutrition, vaccines, and natural health remedies, often emphasizing a holistic approach to wellness. Despite his popularity, Dr. Mercola has faced criticism from medical professionals and health organizations for promoting unproven treatments and spreading misinformation. His views on vaccines, in particular, have sparked controversy, leading to debates about the safety and efficacy of vaccines in the broader context of public health.