What is it?
Shiitake mushroom is a fungus. An extract made from this mushroom is used as medicine.
Shiitake mushroom is used to boost the immune system and to treat HIV/AIDS, common cold, flu (influenza), and many other conditions, but there is no good scientific evidence to support these uses.
Possibly Ineffective for …
- Tooth plaque. Rinsing the mouth with a liquid containing shiitake mushroom does not seem to reduce tooth plaque.
Insufficient Evidence to Make a Determination for …
- Prostate cancer. Early research suggests that shiitake mushroom does not prevent prostate cancer from becoming worse.
- Breast cancer.
- Common cold.
- Flu (influenza).
- Genital herpes.
- Hardening of the arteries (atherosclerosis).
- High cholesterol.
- High blood pressure.
- Swelling (inflammation) of the liver caused by the hepatitis B virus (hepatitis B).
- Other conditions.
More evidence is needed to rate the effectiveness of shiitake mushroom for these uses.
Shiitake mushroom is LIKELY SAFE when consumed in food amounts. It is POSSIBLY UNSAFE in medicinal amounts, or when the uncooked mushroom is eaten. It can cause stomach discomfort, blood abnormalities, and skin swelling (inflammation). It might also cause an increased sensitivity to the sun, allergic skin reactions, and breathing problems.
Special Precautions & Warnings:
Pregnancy and breast-feeding: There isn’t enough reliable information to know if shiitake mushroom is safe to use when pregnant or breast-feeding. Stay on the safe side and stick to food amounts.
“Auto-immune diseases” such as multiple sclerosis (MS), systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), or other conditions: Shiitake mushroom might cause the immune system to become more active. This could increase the symptoms of auto-immune diseases. If you have one of these conditions, it’s best to avoid using shiitake mushroom.
A blood disorder called hypereosinophilic syndrome: Don’t use shiitake mushroom if you have this condition. It might make it worse.
Natural Medicines disclaims any responsibility related to medical consequences of using any medical product. Effort is made to ensure that the information contained in this monograph is accurate at the time it was published. Consumers and medical professionals who consult this monograph are cautioned that any medical or product related decision is the sole responsibility of the consumer and/or the health care professional. A legal License Agreement sets limitations on downloading, storing, or printing content from this Database. Except for any possible exceptions written into your License Agreement, no reproduction of this monograph or any content from this Database is permitted without written permission from the publisher. Unlawful to download, store, or distribute content from this site.
For the latest comprehensive data on this and every other natural medicine, health professionals should consult the Professional Version of the Natural Medicines. It is fully referenced and updated daily.
© Copyright 1995-2021. Therapeutic Research Faculty, publishers of Natural Medicines, Prescriber’s Letter, and Pharmacist’s Letter. All rights reserved.