Nausea and vomiting are the only reported adverse effects associated with the use of Essiac. The manufacturer of Flor Essence states that users may experience increased bowel movements, frequent urination, swollen glands, skin blemishes, flu-like symptoms, or slight headaches.
Laboratory and animal experiments have shown that some of the chemicals in the herbs used to make Essiac and Flor Essence have antioxidant, anti-inflammatory, estrogenic, or anticancer activity.[7-15]
Some benefits that can occur from detoxifying your body include improved digestion and absorption of nutrients, more efficient elimination of wastes, increased energy, better sleeps, enhanced immunity, less bloating and gas, decreased body and breath odor and healthier looking skin.
Although the use of Essiac and Flor Essence is generally associated with cancer treatment, both products have been used to treat other health conditions. Essiac has reportedly been used to control diabetes and to treat acquired immunodeficiency syndrome. Flor Essence has reportedly been studied in Russia as a treatment for chronic gastrointestinal diseases (e.g., esophagitis, gastritis, duodenitis, and colitis) and as a treatment for cirrhosis of the liver. However, no controlled data have been published in the peer-reviewed scientific literature to show the safety or the efficacy of Essiac or Flor Essence in patients with cancer or in patients with other health conditions (refer to the Human/Clinical Studies section of this summary for more information).
Flor Essence tea has a strong woody, organic taste and may not be appealing to your palate. Some mild side effects have been reported from drinking the tea and include nausea, upset stomach, diarrhea, malaise and restless sleep, although these symptoms may be more related to the effects of detoxification, as cited in Phyllis Balch’s “Prescription for Nutritional Healing."