Reishi (Ganoderma lucidum) is a glossy, woody, red-brown bracket mushroom that has been used in traditional Chinese medicine for at least 2,000 years and is now sold as extracts, powders, capsules, tinctures and gummies. It is not a psychedelic. Human research on what it does is mixed, so no label can honestly promise you a result. Below: what it is, what is in it, what to watch for, and how to read a reishi label.
Disclosure: this site and Pilly Labs are under common ownership.
What exactly is reishi mushroom?
Reishi is the common name for Ganoderma lucidum, also called lingzhi in Chinese and mannentake in Japanese. It is a polypore: instead of gills, it releases spores through small pores on the underside. The cap is usually kidney- or fan-shaped, with a shiny, almost varnished, reddish-brown surface. It grows on hardwoods such as maple and is rare in the wild, so most reishi sold today is cultivated on hardwood logs, sawdust or wood chips, according to Zamnesia and Mushroom Appreciation.
It is not a cooking mushroom. It is tough, corky and bitter, so people turn it into tea, extracts, powders, capsules or tinctures. Several other Ganoderma species are also sometimes called reishi, so a good label names the species.
Traditional texts such as the Shennong Ben Cao Jing describe it as a prized herb, which is where nicknames like “mushroom of immortality” come from. Tradition is not the same as clinical proof. For that gap, see Reishi: Traditional Use vs Modern Clinical Evidence.
What does reishi do to the body?
Reishi contains polysaccharides (including beta-glucans) and triterpenes. Wellness sites such as VitalPlan describe these compounds as the reason reishi is studied for immune, liver, cardiovascular and stress topics. Most of the studies they cite are lab-dish or animal studies, and VitalPlan itself says more human trials are needed.
Two clinical reviews of reishi in people (review one and review two, both on PubMed) are the kind of source to read if you want the human picture. Their takeaway, as Pilly Labs’ research notes summarize them: human evidence is mixed and tied to specific conditions, preparations, doses and outcomes. Broad, general-purpose benefits from retail products are not established.
That matters for any finished product. Research on an ingredient is not proof that a particular capsule, drop or gummy works. For a plain-language guide to that distinction, see Ingredient Evidence vs. Marketing Claims.
Is reishi a hallucinogen?
No. Zamnesia states that reishi contains no psychoactive compounds and that it is legal because of that. It is a different kind of fungus from “magic” mushrooms, and it is taken for traditional wellness uses, not for a trip. If you buy a blend, the label should name every mushroom in it, so you can see what else is included.
What does reishi do to the brain?
Reishi is traditionally described as calming, and some sellers market it for relaxation and sleep. Human evidence is the weak spot. The research reviews above are mixed, and no brain or sleep outcome is established for retail reishi products. If sleep is your reason for looking, read Reishi Mushroom for Sleep: What the Research Actually Shows.
Individual experiences vary, and no outcome or timeline is guaranteed.
Is it okay to take reishi every day?
Many sellers describe daily use, and some wellness sites say effects build with consistent use. Whether daily use suits you depends on your health, your medications and the product. Ask a clinician if you take medication, are pregnant or nursing, or have a medical condition.
Dose advice varies enormously because forms differ (dried mushroom, concentrated extract, powder, tincture). Here is what different sites say, so you can see why the label matters more than any single number:
| Site | Amount it describes |
|---|---|
| VitalPlan | 200-400 mg of a standardized powdered extract, 1-3 times daily |
| Zombie Mushrooms | 1-2 g of dry extract per day to start, up to 6 g |
| TUSOL Wellness | 1-1.5 g of powder, or 5-9 g of crude dried mushroom |
| Zamnesia | 25-100 g raw mushroom, or 2.5-10 g of full-spectrum extract |
| Mushroom Appreciation | 1-6 g of pills or tablets |
These are descriptions from sellers and wellness sites, not clinical recommendations. A concentrated extract and raw mushroom are not interchangeable, so follow the directions on your product’s label.
How long does reishi take to kick in?
There is no reliable answer. Zamnesia says benefits usually begin after about 10 to 14 days and are most noticeable after a month, while Mushroom Appreciation says it can take a few weeks to two months. Both describe reishi as something taken consistently, not a one-dose effect. Treat these as the sites’ own estimates: no outcome or timeline is guaranteed, and some people notice nothing.
What are the downsides of reishi?
Sites generally describe side effects as uncommon. These are the ones they list:
| Possible effect | Who mentions it |
|---|---|
| Dry mouth, throat or nose | VitalPlan, Mushroom Appreciation, Zamnesia, TUSOL |
| Upset stomach, nausea, diarrhea | VitalPlan, Zombie Mushrooms, TUSOL, Zamnesia |
| Dizziness or lightheadedness | Zombie Mushrooms, TUSOL, Zamnesia |
| Rash or itching | VitalPlan, TUSOL |
| Nosebleeds | Zamnesia, TUSOL |
| Lower blood pressure | Zombie Mushrooms, TUSOL |
TUSOL’s list also includes more serious items such as liver toxicity and bloody stool, and it says supplements like this can worsen some health conditions. Stop and talk to a clinician if you have a reaction. You can also report adverse events to the FDA at safetyreporting.hhs.gov or 1-800-FDA-1088, as Pilly Labs’ own notice points out.
Skip it or ask a clinician first if you have a mushroom or mold allergy, a bleeding disorder, upcoming surgery, are pregnant or nursing, or are under 18. Safety in pregnancy and breastfeeding has not been established.
What should you not mix reishi with?
Pilly Labs’ interaction notice lists categories of medication to discuss with a clinician before using functional mushroom supplements, including reishi:
| If you take… | Why it comes up |
|---|---|
| Blood thinners or anticoagulants | Reishi may have mild anticoagulant properties; VitalPlan also says to use cautiously with blood thinners |
| Blood pressure medication | Reishi may lower blood pressure and add to the medication’s effect |
| Blood sugar medication | Several mushroom species may affect blood glucose |
| Immunosuppressants | Beta-glucans may stimulate immune activity, which could work against these drugs |
| Sedatives or anti-anxiety medication | Reishi and other calming ingredients may add to sedation |
| Chemotherapy or radiation | Some mushroom compounds may interact; involve your oncologist |
| Medications processed by the liver | Some compounds may affect liver enzymes |
It also advises stopping supplements at least two weeks before scheduled surgery, because of possible effects on bleeding and blood sugar. Confirm timing with your surgeon. Also watch for stacking calming products: valerian and passionflower, which show up in some reishi blends, can cause drowsiness. The NIH’s National Center for Complementary and Integrative Health summarizes what is known about valerian (evidence for sleep is insufficient or inconsistent, long-term safety information is limited) and passionflower (research is small and inconclusive). For a longer walkthrough, see Mushroom Gummies and Medications. Your pharmacist or doctor is the person to ask about your own medications.
Does reishi get rid of belly fat?
Reishi is not an established fat-loss ingredient. The human research reviews are mixed and specific to particular conditions, and none of the sources used here presents belly fat as a reishi outcome. If a product page implies otherwise, be skeptical. If you are choosing between formats, look at the label for added sugar: gummies carry some, and Pilly Labs’ records list 2 g of added sugar per gummy for its Reishi Relax Gummies.
Which is better, lion’s mane or reishi?
They are different mushrooms, and neither is proven to do what marketing often implies. Reishi is traditionally associated with calm and evening routines. Lion’s mane is often marketed for focus. The human research on lion’s mane is also early: a small 2025 acute study of 18 adults, using 3 g of a 10:1 fruiting body extract, found no significant overall effect on cognition or mood, with a signal on one isolated task.
A fair way to choose is by what you want and what the label discloses: the species you are after, the amount per serving, and any other active ingredients or cautions. For side-by-side detail, read Lion’s Mane, Cordyceps, and Reishi: What Each Mushroom Actually Does.
How do you read a reishi supplement label?
- Species: look for Ganoderma lucidum or another named species.
- Part and form: fruiting body or mycelium, and whether it is an extract (a 10:1 ratio means roughly ten parts mushroom per part extract).
- Amount per serving: a single reishi amount is easier to evaluate than a combined blend where individual amounts are not disclosed.
- Other ingredients: sweeteners and added botanicals change both the cautions and the fit.
For an example of a label that lists reishi alongside other calming botanicals, see the Reishi Relax Gummies page. Pilly Labs’ records list 200 mg of reishi and 25 mg each of L-theanine, lemon balm, passionflower and valerian per gummy. The product page currently says the exact serving size and amounts are being reverified, so the physical bottle is what to trust. The seller suggests 1 to 2 gummies about 30 to 60 minutes before winding down, and says anyone taking sedative or anti-anxiety medication should pause and ask a clinician first. Its Reishi Calm Drops list 150 mg of reishi plus a 50 mg five-mushroom complex, and its 10-mushroom gummies list a 250 mg combined blend; in both cases the individual mushroom amounts inside the blend are not disclosed. Ingredient research does not show that any of these finished products works.
Before you order
- Ask the seller for the current label if the product page and label disagree on amounts.
- Check whether reishi is listed alone or inside a blend with undisclosed amounts.
- If you take medication, are pregnant or nursing, or have surgery planned, ask a clinician or pharmacist first.
- Do not rely on a seller’s claim of testing or certification unless it names the document, lot and lab.
For a broader overview, see What Is Reishi Mushroom? Benefits, Side Effects and Safety.
By TopShelfMushrooms.com Editorial Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
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