Evidence Based This post has 47 references
5 /5

Can Reishi Fight Coronavirus & COVID-19?

Written by Carlos Tello, PhD (Molecular Biology) | Last updated:
Puya Yazdi
Medically reviewed by
Puya Yazdi, MD | Written by Carlos Tello, PhD (Molecular Biology) | Last updated:

SelfHacked has the strictest sourcing guidelines in the health industry and we almost exclusively link to medically peer-reviewed studies, usually on PubMed. We believe that the most accurate information is found directly in the scientific source.

We are dedicated to providing the most scientifically valid, unbiased, and comprehensive information on any given topic.

Our team comprises of trained MDs, PhDs, pharmacists, qualified scientists, and certified health and wellness specialists.

All of our content is written by scientists and people with a strong science background.

Our science team is put through the strictest vetting process in the health industry and we often reject applicants who have written articles for many of the largest health websites that are deemed trustworthy. Our science team must pass long technical science tests, difficult logical reasoning and reading comprehension tests. They are continually monitored by our internal peer-review process and if we see anyone making material science errors, we don't let them write for us again.

Our goal is to not have a single piece of inaccurate information on this website. If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please leave a comment or contact us at [email protected]

Note that each number in parentheses [1, 2, 3, etc.] is a clickable link to peer-reviewed scientific studies. A plus sign next to the number “[1+, 2+, etc...]” means that the information is found within the full scientific study rather than the abstract.

Ganoderma lucidum/“Lingzhi” (soul/spirit) mushroom, commonly known as “Reishi mushroom”, is a potent fungus that has been used for thousands of years in traditional Chinese medicine. Proponents claim it is especially good at modifying the immune system by increasing it when weakened, or lowering it when it is too active [1].

It has 400 different bioactive compounds reported to have a number of potential effects including modification of the immune system, anti-inflammatory, anti-tumor, antibacterial, antiviral, anti-diabetic, and anti-oxidative [1].

This article is for informational purposes only. The current coronavirus outbreak is an ongoing event and certain details may change as new information comes to light. No effective or FDA-approved products are currently available for the treatment of the new coronavirus (also known as SARS-CoV-2 or 2019-nCoV), although research is still ongoing. For now, the best preventive measures you can take against COVID-19 are standard precautions, including social distancing, hand washing, and avoiding touching your face.

To date, there have been no direct studies on Reishi and COVID-19 or the new coronavirus in any of the areas discussed. We are simply providing information about Reishi’s health effects in areas that are of interest to people concerned about COVID-19. However, we can’t draw any conclusions related to COVID-19 given that there is no direct research.

Reishi’s Effect on the Immune System & Inflammation

Boosting the Immune System

Most people have heard about reishi for balancing immunity. Studies have identified high amounts of compounds that may strengthen the immune cells and improve general immune system health [2].

Strong immunity, especially in the beginning of an infection, can be important for overcoming coronavirus and for reducing complication.

Two clinical trials on 75 people with advanced-stage cancer showed that both reishi mushroom extract and complex carbohydrates isolated from this fungus increased the counts of several immune cells (CD3+, CD4+, CD8+, and CD56+) and the blood levels of several cytokines (IL-2, IL-6, IFN-gamma), but decreased IL-1 and TNF-alpha [3, 4].

In a clinical trial on 40 male soccer players on a training program to improve endurance performance (‘living high-training low’), reishi mushroom helped correct the reduction in the CD4+/CD8+ ratio caused by the training. The authors suggested this may help the players fight infections [5].

Reducing Inflammation and Oxidative Damage

During later stages of COVID-19, antiinflammatory substances may be beneficial in preventing a cytokine storm.

Studies have shown that reishi may reduce inflammation in rheumatism, asthma, and pink eye without notable side effects [6].

Active compounds isolated from reishi mushroom worked as antioxidants in 2 clinical trials on 42 healthy people and 71 people with chest pain (angina) [7, 8].

14 days of reishi increased anti-inflammatory/antioxidant markers and protected the blood from oxidative damage in mice. It decreased the levels of an oxidant (malondialdehyde) while increasing several antioxidant enzymes (superoxide dismutase, glutathione peroxidase, glutathione S-transferase) [9].

The extracts of reishi and other mushrooms showed anti-inflammatory and antioxidant activity in cells. Among them, reishi was the most effective at inhibiting nitric oxide production in response to bacterial carbohydrates (LPS) [10, 1].


In a clinical trial on 61 people infected with a virus that causes warts (HPV/human papillomavirus), a combination of reishi and Turkey tail mushroom (Trametes versicolor) cleared the infection in 88% of the patients [11].

An herbal formula with reishi mushroom and other extracts decreased herpes zoster pain in 5 people with shingles. The same mixture sped up symptom relief in a small trial on 15 people with cold sores or genital herpes [12, 13].

In two clinical trials on 138 men with urinary tract infections, reishi mushroom extract improved the symptoms and was well tolerated [14, 15].

Reishi mushroom extract improved malaria and prevented the resulting liver damage in infected mice [16].

The mushroom also inhibited the growth of several fungal pathogens and enhanced the antibacterial effects of antibiotics against infectious microbes in test tubes [17, 18].

Two triterpenoids from Ganoderma lucidum prevented enterovirus 71 infection in a cell-based study, possibly by blocking its attachment to the cells [19].

Five triterpenoids from Ganoderma lucidum inhibited the activation of Epstein-Barr virus antigens in cells [20, 21].

In cells, a terpenoid from Ganoderma lucidum (ganoderic acid) prevented the replication of the hepatitis B virus [22] and protein-bound polysaccharides had the same effect on the herpes simplex viruses 1 and 2 [23].

Enzymatic assays identified several compounds from Ganoderma lucidum capable of inhibiting the protease needed by the HIV-1 virus to produce infective particles [24, 25] and the neuraminidase used by the Newcastle disease virus to infect cells [26].

In addition, two triterpenoids from this mushroom inhibited the enzyme required by the avian influenza H5N1 virus to infect cells (neuraminidase) [27]. This approach also identified its compound hesperetin as an inhibitor of the protease used by the dengue virus to produce infectious particles [28, 29].

Lung Function

COVID-19 is particularly hard on the lungs, and people often need oxygen and ventilators. In addition, preconditions like asthma may increase the fatality of COVID-19.

A commercial herbal formula with Ganoderma lucidum and two herbs used in Chinese medicine (Chinese licorice and Sophora flavescens) improved lung function (although less than prednisone) in a clinical trial on 91 asthmatic people and a study in mice. The complex was well tolerated and caused no adverse effects in another trial on 20 people [30, 31, 32].

Studies revealed that compounds found in reishi effectively inhibit the release of histamine from mast cells, which may explain its benefits for asthma [33, 34, 35].

In a clinical trial on 96 healthy people, a supplement combining Ganoderma lucidum and Cordyceps failed to improve different exercise capacity parameters [36].

In rats, its polysaccharides protected against lung tissue scarring [37].

Caution: Due to their small size and allergen content, Ganoderma lucidum’s airborne spores can trigger respiratory allergies if they enter the lower respiratory tract of sensitive people [38, 39, 40, 41].

Heart Disease

Heart disease can significantly increase the risk of death from COVID-19.

An active compound isolated from reishi mushroom (beta-D-glucan) reduced the risk of narrowed arteries (atherosclerosis) in 71 people with chest pain by acting as an antioxidant [8].

Reishi extract also reduced damage to the cells that line blood vessels in a small trial on 14 people with kidney damage, thus reducing the risk of heart attacks [42].

In a clinical trial on 26 people with diabetes, reishi helped reduce both blood cholesterol and insulin resistance. However, a similar trial on 84 people found reishi ineffective to reduce cardiovascular risk factors in diabetics [43, 44].

A protein-rich extract of this mushroom lowered blood pressure, with the effects lasting up to 8 hours, in hypertensive rats [45].


Because reishi mushroom is not approved for any conditions, there is no official dose. Users and supplement manufacturers have established unofficial doses based on trial and error. They normally recommend taking 1-2 caps per day of the extract.

In clinical trials, doses of up to 6 grams of extract per day were used depending on the condition [15, 43, 46, 44, 4, 47].


Reishi shows promise of improving general health in ways that may lessen the severity of COVID-19. Unfortunately, no direct evidence exists that Reishi can help COVID-19.

About the Author

Carlos Tello

Carlos Tello

PhD (Molecular Biology)
Carlos received his PhD and MS from the Universidad de Sevilla.
Carlos spent 9 years in the laboratory investigating mineral transport in plants. He then started working as a freelancer, mainly in science writing, editing, and consulting. Carlos is passionate about learning the mechanisms behind biological processes and communicating science to both academic and non-academic audiences. He strongly believes that scientific literacy is crucial to maintain a healthy lifestyle and avoid falling for scams.

Click here to subscribe


1 Star2 Stars3 Stars4 Stars5 Stars
(5 votes, average: 5.00 out of 5)

FDA Compliance

The information on this website has not been evaluated by the Food & Drug Administration or any other medical body. We do not aim to diagnose, treat, cure or prevent any illness or disease. Information is shared for educational purposes only. You must consult your doctor before acting on any content on this website, especially if you are pregnant, nursing, taking medication, or have a medical condition.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.