The National Comprehensive Cancer Network (NCCN) is a nonprofit alliance of 26 cancer centers throughout the U.S. Experts from NCCN cancer centers diagnose and treat all cancers, with a particular focus on complex, aggressive, or uncommon cancers.
The National Comprehensive Cancer Network also develops the NCCN Clinical Practice Guidelines in Oncology, a set of recommendations designed to help health care professionals diagnose, treat, and manage cancer patient care. These guidelines have also been translated into the NCCN Treatment Summaries for People with Cancer, which help people with cancer better understand cancer diagnosis and treatment options.
Essiac and Flor Essence are herbal tea mixtures that are sold worldwide as health tonics or herbal dietary supplements (see Question 1).
Essiac was first promoted as a cancer treatment in the 1920s. Flor Essence was created a number of years later (see Question 2).
Supporters of Essiac and Flor Essence say that these products make the immune system stronger, have anti-inflammatory effects, and show anticancer activity (see Question 3).
Laboratory, animal, and clinical (human) studies...