Reishi Mushrooms: The Complete Guide

What are reishi mushrooms?

Reishi mushrooms, also known as Ganoderma lucidum or Lingzhi, are a type of medicinal mushroom that has been used in traditional medicine for over 2,000 years. They are known for their potential health benefits and are often consumed as a dietary supplement or used in traditional remedies.

Reishi mushrooms are commonly associated with wellness and immune support, containing over 400 biologically active compounds. These include beta-glucans, polysaccharides, triterpenes, and terpenoids, which are known for their antioxidant, anti-inflammatory, and immune-modulating, properties.

Reishi mushrooms have a distinctive appearance, with a large, flat, kidney-shaped cap and a woody texture. In the wild, reishi mushrooms grow on the bases and stumps of deciduous trees, particularly maple and oak trees. They are native to several Asian countries, including China, Japan, and Korea, but are now cultivated in many other parts of the world.

Different types of reishi mushrooms

There are different strains or types of reishi mushrooms. The most commonly known type is Ganoderma lucidum, which is often referred to simply as reishi.

However, the Reishi name is sometimes used more broadly to refer to several species within the genus that share similar properties. Here are some notable species often included under the term "reishi":

1. Ganoderma lucidum
   This is the most widely known and studied type, traditionally used in East Asian medicine. It's recognized for its shiny, varnished appearance.
2. Ganoderma tsugae
   This species is similar to Ganoderma lucidum, but it typically grows on hemlock trees. It is found predominantly in North America and parts of Asia.
3. Ganoderma sinense
   This species is similar to Ganoderma lucidum and is used in traditional Chinese medicine. The potency can vary depending on the specific strain and growing conditions.
4. Ganoderma curtisii
   Found in the southeastern United States, this species grows primarily on hardwood stumps and logs.
5. Ganoderma lingzhi
   The term "Ganoderma lingzhi" is often used interchangeably with "Ganoderma lucidum" in Chinese medicine. While some sources may use "Ganoderma lingzhi" to refer to a specific cultivated strain with higher polysaccharide content, this usage is not universal, and the two names are often used synonymously.

How do reishi mushrooms work in your body?

Where are reishi mushrooms found?

Reishi mushrooms are found naturally in several parts of Asia, particularly in East Asian countries such as China, Japan, and Korea. They typically grow at the base of deciduous trees, especially maple and oak trees, in hot and humid locations.

Here are some more details on the natural habitat and distribution of reishi mushrooms:

1. East Asia: China, Japan, and Korea are the main countries where reishi mushrooms are found in the wild. They are particularly abundant in the mountainous regions of these countries.
2. Southeast Asia: Reishi mushrooms can also be found in some parts of Southeast Asia, including Thailand, Vietnam, and Malaysia.
3. North America: While not native to North America, reishi mushrooms have been cultivated in some regions of the United States and Canada.
4. Europe: Reishi mushrooms are not native to Europe but have been introduced and cultivated in some countries, such as Italy and the Czech Republic.

Due to their growing popularity and medicinal uses, reishi mushrooms are now commercially cultivated in many countries worldwide, often using artificial logs or substrates under controlled conditions. This has made them more widely available beyond their natural habitats.

Delivery methods

Reishi mushroom supplements come in various delivery methods, each offering its own set of benefits and methods of consumption. Here's a brief overview of the different delivery methods:

What to look for in reishi mushroom supplements

When selecting a supplement, several key factors must be considered to ensure you choose a high-quality product that effectively supports your health goals and overall well-being.

Get your personalized vitamin recommendations in less than 3 minutes.

Take the Health Quiz

How and when should you take reishi mushrooms for maximum absorption?

To get the most out of your reishi mushroom supplement, it's crucial to consider the timing and method of consumption. The following dos and don'ts offer guidance on optimizing absorption, efficiently supporting your health and wellness, and minimizing potential discomfort.

Who should take reishi mushrooms?

Taking reishi mushroom supplements has its potential benefits, but it may not be for everyone.

Side effects of excessive reishi mushroom consumption

While reishi mushroom supplements are generally safe when taken within recommended limits, excessive intake can have adverse effects:

• Digestive issues: Reishi mushrooms contain polysaccharides that may irritate the stomach and intestines, leading to nausea, vomiting, diarrhea, or constipation.
• Blood thinning: Reishi mushrooms may interfere with blood clotting and increase the risk of bleeding, especially if taken with anticoagulant drugs or before surgery.
• Liver damage: Reishi mushrooms may cause liver toxicity in some people, especially if taken for a long time or in high doses.
• Allergic reactions: Reishi mushrooms may trigger allergic reactions in some people, such as rash, itching, swelling, or difficulty breathing.
• Hormonal imbalance: Reishi mushrooms may affect the levels of hormones in the body, such as testosterone, estrogen, and thyroid hormones.
• Drug interactions: Reishi mushrooms may interact with some medications, such as chemotherapy drugs, immunosuppressants, antihypertensives, or antidiabetics, and alter their effects or cause adverse reactions.

Health made easy: your go-to resource for essential vitamins and supplements

Magnesium NOW

Probiotic

Omega-3 Fish Oil

Take the Health QuizBrowse all products

Frequently asked questions about reishi mushrooms (FAQ)

Our library of expert-authored articles covers just about every question you might have about vitamins, minerals, and supplements — along with some you might not have known you had.

Final thoughts

Reishi mushrooms show promise in many aspects of health, from potentially boosting the immune system to reducing fatigue. It's important to use reishi mushrooms in moderation. If you have health issues or take certain medicines, talk to your doctor before adding them to your routine. Always aim for balance and get personalized advice for your overall well-being when using dietary supplements.

Sources and references

1. Exploring the Potential Medicinal Benefits of Ganoderma lucidum: From Metabolic Disorders to Coronavirus Infections
2. Immuno-physiological effects of dietary reishi mushroom powder as a source of beta-glucan on Rohu, Labeo rohita challenged with Aeromonas veronii - PMC
3. Antioxidant Activity of Mushroom Extracts/Polysaccharides—Their Antiviral Properties and Plausible AntiCOVID-19 Properties - PMC
4. A preliminary review of studies on adaptogens: comparison of their bioactivity in TCM with that of ginseng-like herbs used worldwide
5. Ganoderma lucidum mushroom for the treatment of cardiovascular risk factors - PMC
6. A randomized, double-blind and placebo-controlled study of a Ganoderma lucidum polysaccharide extract in neurasthenia
7. Nutritional Profile and Health Benefits of Ganoderma lucidum “Lingzhi, Reishi, or Mannentake” as Functional Foods: Current Scenario and Future Perspectives