There are concerns that it may worsen low blood pressure and interfere with treatment. If your blood pressure is too low, it's best to avoid reishi mushroom. There really isn't a definitive answer as to whether the reishi mushroom lowers blood pressure or not. Lingzhi doesn't seem to affect blood pressure in normal people or in people with slightly higher blood pressure, although it does seem to help people with very high blood pressure.
These supplements can also lower blood pressure. People who already have low blood pressure or who are taking blood pressure medications may want to avoid reishi mushrooms. Reishi mushrooms can be harmful to people who have bleeding problems, are pregnant, or are taking certain medications. Reishi mushrooms are best known for their supposed effects in boosting the immune system and helping to fight cancer.
According to a review article, reishi mushrooms contain polysaccharides, peptides, and triterpenoids, which may provide some of their health benefits. This advice also applies to those taking immunosuppressants, as reishi mushroom supplements may counteract their effectiveness. Many people believe that reishi mushrooms provide some health benefits, mainly improving the immune system and treating cancer. The Komen Foundation notes that reishi mushroom extract is possibly safe for up to 1 year when a person takes it orally.
However, they also point out that taking powdered reishi mushrooms for more than 1 month can be toxic to the liver. There is also evidence from in vitro and animal studies that reishi mushrooms can help the immune system, but high-quality human studies are needed before researchers draw conclusions. A review of studies found that reishi mushrooms can help boost the immune system, but the authors wouldn't recommend them as a first response to cancer. Despite the popularity of reishi mushrooms in Eastern medicine, there are few human studies on the effects of this mushroom.
Reishi mushrooms (Ganoderma lucidum) have been part of some traditional medicine practices for more than 2000 years. People should carefully consider the dangerous side effects mentioned above before trying reishi mushroom supplements. Some people claim that reishi mushrooms can boost the immune system, fight cancer, and alleviate the symptoms of many other health conditions. Therefore, people whose doctors have scheduled surgery and people with bleeding disorders should not take reishi mushrooms.