6 Benefits of Reishi Mushroom
Originally published here: https://www.healthline.com/nutrition/reishi-mushroom-benefits
Eastern medicine makes use of many different plants and fungi. Interestingly, the reishi mushroom is particularly popular.
It has a variety of potential health benefits, including boosting the immune system and fighting cancer. However, its safety has recently come into question.
This article will tell you what you need to know about the potential benefits and risks of reishi mushroom.
What Is the Reishi Mushroom?
The reishi mushroom, also known as Ganoderma lucidum and lingzhi, is a fungus that grows in various hot and humid locations in Asia (Trusted Source).
For many years, this fungus has been a staple in Eastern medicine (Trusted Source).
Within the mushroom, there are several molecules, including triterpenoids, polysaccharides and peptidoglycans, that may be responsible for its health effects (Trusted Source).
While the mushrooms themselves can be eaten fresh, it is also common to use powdered forms of the mushroom or extracts that contain these specific molecules.
These different forms have been tested in cell, animal and human studies.
Below are 6 scientifically studied benefits of the reishi mushroom. The first three are backed by stronger evidence, while support for the others is less conclusive.
1. Boost the Immune System
One of the most important effects of the reishi mushroom is that it can boost your immune system (Trusted Source).
While some details are still uncertain, test-tube studies have shown that reishi can affect the genes in white blood cells, which are critical parts of your immune system.
What’s more, these studies have found that some forms of reishi may alter inflammation pathways in white blood cells (Trusted Source).
Research in cancer patients has shown that some of the molecules found in the mushroom can increase the activity of a type of white blood cell called natural killer cells (Trusted Source).
Natural killer cells fight infections and cancer in the body (Trusted Source).
Another study found that reishi can increase the number of other white blood cells (lymphocytes) in those with colorectal cancer (Trusted Source).
Although most immune system benefits of reishi mushroom have been seen in those who are ill, some evidence has shown that it can help healthy people, too.
In one study, the fungus improved lymphocyte function, which helps fight infections and cancer, in athletes exposed to stressful conditions (Trusted Source).
However, other research in healthy adults showed no improvement in immune function or inflammation after 4 weeks of taking reishi extract (Trusted Source).
Overall, it is clear that reishi impacts white blood cells and immune function. More research is needed to determine the extent of the benefits in the healthy and ill.
2. Anti-Cancer Properties
Many people consume this fungus due to its potential cancer-fighting properties (Trusted Source).
In fact, one study of over 4,000 breast cancer survivors found that around 59% consumed reishi mushroom (Trusted Source).
Additionally, several test-tube studies have shown that it can lead to the death of cancer cells (Trusted Source).
Yet the results of these studies do not necessarily equate to effectiveness in animals or humans.
Some research has investigated if reishi could be beneficial for prostate cancer due to its effects on the hormone testosterone (Trusted Source).
While one case study showed that molecules found in this mushroom may reverse prostate cancer in humans, a larger follow-up study did not support these findings (Trusted Source).
Reishi mushroom has also been studied for its role in preventing or fighting colorectal cancer (Trusted Source).
Some research showed that one year of treatment with reishi decreased the number and size of tumors in the large intestine (Trusted Source).
What’s more, a detailed report of multiple studies indicated that the mushroom can beneficially affect cancer patients (Trusted Source).
These benefits included increasing the activity of the body’s white blood cells, which help fight cancer, and improving quality of life in cancer patients.
However, researchers state that reishi should be administered in combination with traditional treatment rather than replacing it (Trusted Source).
What’s more, many of the studies of reishi mushroom and cancer were not high-quality. Because of this, much more research is needed (Trusted Source).
3. Could Fight Fatigue and Depression
Reishi’s effects on the immune system are often most emphasized, but it has other potential advantages as well.
These include reduced fatigue and depression, as well as improved quality of life.
One study examined its effects in 132 people with neurasthenia, a poorly defined condition associated with aches, pains, dizziness, headaches and irritability (Trusted Source).
The researchers found that fatigue was reduced and well-being was improved after 8 weeks of taking the supplements.
Another study found that fatigue was reduced and quality of life was improved after 4 weeks of taking reishi powder in a group of 48 breast cancer survivors (Trusted Source).
What’s more, the people in the study also experienced less anxiety and depression.
While reishi mushroom may hold promise for people with certain diseases or illnesses, it is not clear if it would benefit those who are otherwise healthy.
4. Heart Health
One 12-week study of 26 people showed that reishi mushroom may increase “good” HDL cholesterol and decrease triglycerides (Trusted Source).
However, other research in healthy adults showed no improvement in these heart disease risk factors (Trusted Source).
Moreover, a large analysis demonstrated no beneficial effects for heart health after examining five different studies containing around 400 people. The researchers found that consuming reishi mushroom for up to 16 weeks did not improve cholesterol (Trusted Source).
Overall, more research is needed in regard to reishi mushrooms and heart health.
5. Blood Sugar Control
Several studies have indicated that molecules found in the reishi mushroom can decrease blood sugar in animals (Trusted Source).
Some preliminary research in humans reported similar findings .
However, the majority of research has not supported this benefit. After evaluating hundreds of participants, researchers found no benefits for fasting blood sugar (Trusted Source).
Mixed results were seen for blood sugar after meals. In some cases, reishi mushroom lowered blood sugar, but in other cases, it was worse than a placebo.
Again, more research is needed here as well.
6. Antioxidant Status
Antioxidants are molecules that can help prevent damage to your cells (31).
Because of this important function, there is substantial interest in foods and supplements that can enhance antioxidant status in the body.
Many claim that reishi mushroom is effective for this purpose.
However, several studies have found no change in the levels of two important antioxidant enzymes in the blood after consuming the fungus for 4 to 12 weeks (Trusted Source).