
Reishi mushrooms, also known as Ganoderma lucidum, lingzhi, or the mushroom of immortality, have been used in traditional Asian medicine for centuries. They are believed to have various health benefits, including boosting the immune system, fighting infections, and potentially helping with cancer treatment. However, despite their long history of use, there are concerns and conflicting findings regarding their safety. While some studies suggest potential benefits, others indicate possible side effects, such as increased bleeding risk, interactions with medications, and liver toxicity. The effectiveness and safety of reishi mushrooms are still being studied, and it is always advisable to consult a healthcare professional before consuming them.
| Characteristics | Values |
|---|---|
| Safety | Reishi mushrooms are considered safe for most people, and there is no evidence of toxic effects throughout their long medicinal history. However, there is also growing evidence suggesting that they may be toxic and cause health issues. |
| Side effects | Reishi mushrooms may increase the risk of bleeding, especially in people taking blood thinners like warfarin. They may also increase bleeding during surgery. |
| Interactions | Reishi mushrooms may interact with anticoagulants, antiplatelets, immunosuppressants, chemotherapeutic agents, and blood pressure medications. |
| Precautions | Pregnant or breastfeeding women should avoid consuming reishi mushrooms due to a lack of studies on their safety during these periods. People with bleeding disorders or those scheduled for surgery should also refrain from taking reishi mushrooms due to the increased risk of bleeding. |
| Dosage | The recommended dosage varies between 1.5 to 9 grams per day. However, there is no agreed-upon dosage, and the right amount depends on the specific product and form of the mushroom used. |
| Benefits | Reishi mushrooms are believed to boost the immune system, reduce inflammation, lower blood sugar and blood pressure, and possess anti-cancer properties. |
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What You'll Learn

Reishi mushroom tea may increase the risk of bleeding
Reishi mushrooms, also known as Ganoderma lucidum, have been used in traditional medicine in China, Japan, Korea, and other Asian countries for hundreds of years. They are considered to have health-promoting effects, such as boosting the immune system, reducing stress, improving sleep, and lessening fatigue. However, despite their long history of use, there are growing concerns about their safety.
Reishi mushrooms may increase the risk of bleeding, especially in individuals taking blood thinners, such as warfarin, or anticoagulants and antiplatelet drugs. This is because reishi can make anticoagulants or antiplatelets more effective. As a result, doctors recommend discontinuing reishi mushrooms at least two weeks before a scheduled surgery. People with bleeding disorders or those taking herbs or supplements that may prevent normal blood clotting should also exercise caution when consuming reishi mushrooms.
Additionally, reishi mushrooms may lower blood pressure, so individuals with low blood pressure or those taking blood pressure medication may need to avoid them. They may also interact with immunosuppressants, potentially worsening symptoms in people with conditions like rheumatoid arthritis, inflammatory bowel disease, or psoriasis.
While reishi mushrooms have a long medicinal history with no evidence of toxic effects, there are limited human studies on the effects of this fungus. Some research and case studies have indicated potential liver toxicity, with one case leading to death. However, it is challenging to determine if the mushroom itself was responsible for the observed liver damage due to other factors involved.
It is always advisable to consult a healthcare professional before consuming reishi mushrooms, especially if you are taking any medications or have specific health conditions.
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It could be unsafe for pregnant or breastfeeding women
Reishi mushrooms, also known as Ganoderma lucidum, lingzhi, or the "mushroom of immortality," have been used in traditional medicine in China, Japan, Korea, and other Asian countries for centuries. They are believed to have various health benefits, including boosting the immune system, reducing fatigue, improving cholesterol and blood sugar levels, and potentially helping to manage certain types of cancer. However, it is important to note that while reishi mushrooms have a long history of medicinal use, there is limited scientific research on their effectiveness and safety, especially in certain populations such as pregnant or breastfeeding women.
Reishi mushrooms are generally considered safe for most people, and there is no evidence of toxic effects from their traditional use. However, there have been reports of rare cases of liver toxicity associated with the consumption of powdered reishi mushroom extract, which can even lead to death. Additionally, there is a lack of research on the safety of reishi mushrooms for pregnant or breastfeeding women. As a result, it is generally recommended that women who are pregnant or breastfeeding avoid consuming reishi mushrooms or related products, including reishi mushroom tea.
The potential risks of consuming reishi mushrooms during pregnancy or breastfeeding are not yet fully understood. While there may be cultural beliefs or traditional practices that include the use of reishi mushrooms during these periods, modern scientific research has not confirmed their safety for these specific populations. Pregnant and breastfeeding women are often advised to exercise caution when it comes to consuming herbal products or supplements due to the potential impact on both the mother and the developing child.
Furthermore, reishi mushrooms have been shown to have biological effects that can impact the body. They can increase the risk of bleeding, especially in individuals taking blood thinners or antiplatelet medications. Reishi mushrooms may also interact with immunosuppressant medications and blood pressure medications. Therefore, it is crucial for pregnant or breastfeeding women to consult their healthcare providers before consuming reishi mushrooms or any other herbal supplements to ensure the safety of both themselves and their children.
In conclusion, while reishi mushrooms have a long history of use in traditional medicine and are considered safe for most people, there are specific populations, including pregnant and breastfeeding women, for whom the potential risks are not yet fully understood. It is always advisable to consult a healthcare professional before consuming any herbal products or supplements, especially during pregnancy or breastfeeding, to ensure the safety and well-being of both mother and child.
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There is no agreed-upon dosage
Reishi mushrooms, also known as Ganoderma lucidum and lingzhi, have been used in traditional medicine in China, Japan, Korea, and other Asian countries for hundreds of years. They are believed to have various health benefits, including boosting the immune system, reducing stress, improving sleep, and lessening fatigue. However, despite their long history of use, there is currently no agreed-upon dosage for reishi mushroom supplementation.
The recommended dosage of reishi mushrooms varies between 1.5 to 9 grams per day, depending on the specific product and form of the mushroom. For example, the recommended doses for supplements that use only certain portions of the extract may be much lower than those that use the whole mushroom. It is important to carefully read the label of any reishi mushroom product and consult a healthcare professional before consuming it to ensure that you are taking an appropriate and safe amount.
The effectiveness and safety of reishi mushrooms have been the subject of ongoing research. While some studies suggest that reishi mushrooms have biological effects that can benefit health, such as stimulating white blood cells and improving immune function, other studies have found insufficient evidence to support these alleged benefits. Additionally, there is limited human data available, as most studies have been conducted on animals or in labs.
Reishi mushrooms may also cause side effects and interactions with certain medications. They have been linked to an increased risk of bleeding, especially in individuals taking blood thinners or antiplatelet drugs. They may also lower blood pressure and interact with blood pressure medications. Furthermore, reishi mushrooms may enhance the immune response, which could worsen symptoms in people taking immunosuppressant medications for conditions like rheumatoid arthritis or inflammatory bowel disease. It is recommended that pregnant or breastfeeding women do not consume reishi mushrooms due to a lack of studies on their safety in these circumstances.
Given the potential risks and uncertainties associated with reishi mushroom supplementation, it is crucial to consult a healthcare professional before adding it to your diet. They can advise on the safety and appropriate dosage based on your individual needs and health status.
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It may have toxic effects on the liver
Reishi mushrooms, also known as Ganoderma lucidum and lingzhi, have been used in traditional medicine in China, Japan, Korea, and other Asian countries. They are believed to have several health benefits, including boosting the immune system and fighting cancer. However, their safety has been questioned, and there is growing evidence that they may have toxic effects, especially on the liver.
The Susan G. Komen Foundation notes that reishi mushroom extract is possibly safe for up to 1 year when taken orally. However, they caution that consuming powdered reishi mushrooms for longer than 1 month may be toxic to the liver. Liver toxicity is a severe side effect that has been known to lead to death. Indeed, there have been reports of liver damage in individuals consuming reishi mushrooms. However, it is challenging to determine if the mushroom itself is responsible for the observed liver damage due to other factors involved.
Reishi mushrooms may also increase the risk of bleeding in people taking blood thinners, such as warfarin, and those with bleeding disorders. Doctors recommend discontinuing reishi mushrooms at least two weeks before surgery to reduce the risk of bleeding during the procedure. Additionally, reishi mushrooms can enhance the immune response, which may worsen symptoms in people taking immunosuppressant medications for conditions like rheumatoid arthritis, inflammatory bowel disease, or psoriasis.
Pregnant and breastfeeding women should also avoid consuming reishi mushrooms, as there has been insufficient research on their safety during these periods. Furthermore, reishi mushrooms may lower blood pressure, so individuals with low blood pressure or those taking blood pressure medication should exercise caution. It is always advisable to consult a healthcare professional before consuming reishi mushrooms or any other dietary supplement to ensure safety and avoid potential interactions with medications or other supplements.
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It can lower blood pressure
Reishi mushrooms, also known as Ganoderma lucidum and lingzhi, are a fungus that grows in various hot and humid locations in Asia. They have been used in traditional medicine for more than 2,000 years and are considered a powerful tonic in Traditional Chinese Medicine.
Reishi mushrooms are known to have many potential health benefits, including boosting the immune system, reducing fatigue, improving cholesterol and blood sugar levels, and acting as an anti-inflammatory agent. They are also being investigated for their potential in cancer treatment due to their effects on inflammation and certain signalling pathways involved in cancer development.
One important effect of reishi mushrooms is their ability to lower blood pressure. This effect is attributed to the presence of compounds called beta-glucans and triterpenoids, which can help to reduce blood pressure levels. For this reason, people who already have low blood pressure or are taking blood pressure medication are advised to avoid reishi mushrooms or consult a healthcare professional before consuming them.
Additionally, reishi mushrooms may interact with other medications, such as anticoagulants or antiplatelets, increasing the risk of bleeding. It is important for individuals taking any medications or supplements to consult their doctor before consuming reishi mushrooms to ensure safe and appropriate use.
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Frequently asked questions
Reishi mushroom tea is believed to have many health benefits, including boosting the immune system, reducing stress, improving sleep, lessening fatigue, and promoting healthy cell growth.
Reishi mushrooms may increase the risk of bleeding, especially in people taking blood thinners like warfarin. They may also increase bleeding during surgery, so it is recommended to discontinue consumption at least two weeks before a scheduled surgery. Reishi mushrooms may also lower blood pressure, so people with low blood pressure or those taking blood pressure medication should exercise caution. Additionally, reishi mushrooms may worsen symptoms in individuals taking immunosuppressant medications for conditions like rheumatoid arthritis or inflammatory bowel disease. It is important to consult a healthcare professional before consuming reishi mushroom tea to ensure its safety for your specific circumstances.
While reishi mushrooms have a long history of medicinal use, there are limited human studies on the long-term effects of this fungus. Some sources suggest that consuming reishi mushroom powder for longer than one month may be toxic to the liver, leading to serious side effects and even death in rare cases. However, other studies indicate that taking reishi mushroom extract orally may be safe for up to one year. It is crucial to consult a healthcare professional and carefully review the product label for recommended dosage and potential side effects before incorporating reishi mushroom tea into your daily routine.

























