There are no confirmed side effects of Organo Coffee, but its reishi mushroom content could cause nausea and dry throat or negative interactions with medications, notes About.com. Excessive consumption of reishi mushroom powder might also cause liver toxicity, warns WebMD.
Organo Coffee contains the reishi mushroom, Ganoderma lucidum. There is suggestion, but no sufficient evidence, that Ganoderma has numerous health benefits, states WebMD. Among these benefits are immune health, lower blood pressure, lower cholesterol, help with fatigue and a remedy for stress. There is also, however, evidence that consuming powdered Ganoderma for over a month at a time stresses the liver.
Ganoderma is also associated with itchiness, upset stomach and blood in the stool, as well as being an allergen to sensitive individuals. Individuals with bleeding disorders are advised to avoid reishi, as are those who are pregnant or breastfeeding. Reishi does appear to lower blood pressure and could adversely affect those on blood pressure medication. Ganoderma mushroom also potentially interacts badly with medications such as anticoagulants and chemotherapy drugs.
Most sources point to the need for more evidence as to the safety and health risks of Ganoderma and Ganoderma products such as Organo Coffee, explains WebMD. It is always best to consult a doctor before beginning any self-treatment regime.