Reishi tea

On this page

About this tea
Origin and tradition
TCM properties
Traditional uses
Ingredients
Method
Variations and pairings
When to drink it
Cautions and contraindications
Frequently asked questions
Related pages

1. About this tea

Reishi tea — ling zhi cha (灵芝茶) — is a decoction of the dried fruiting body of Ganoderma lucidum, a hard, woody, kidney-shaped bracket fungus with a lacquered red-brown surface. The Chinese name means "spirit mushroom" or "mushroom of immortality", and no substance in the Chinese materia medica carries more cultural weight: reishi appears in imperial art, on temple carvings and in Taoist longevity texts.

The tea itself is a surprise to most first-time drinkers. It is genuinely bitter — woody, dark and medicinal, with none of the sweetness people expect from something with such a mystical reputation. It is caffeine-free, and it is drunk as a slow daily tonic rather than for any immediate effect.

2. Origin and tradition

Reishi is listed in the Shennong Bencao Jing in the highest "superior" class, described as lightening the body and extending the years. For most of Chinese history it was genuinely rare — a wild forest find, presented to emperors, and priced accordingly. Reliable cultivation only arrived in the twentieth century, which is why a mushroom once reserved for royalty is now sold in supermarkets.

It has attracted more modern research than almost any other Chinese medicinal fungus, largely for its polysaccharides and triterpenes. That research is genuinely interesting but still mostly preclinical, and the gap between the laboratory literature and the marketing claims made for reishi supplements is wide. It is best approached as a traditional tonic with promising but unsettled evidence.

3. TCM properties

This page covers reishi as a home-brewed tea. Reishi is also a prescribed herb in Chinese herbal medicine, where it is combined with other herbs and dosed to a diagnosed pattern — a different thing from a kitchen infusion. For the clinical profile, actions in formula and drug interactions, see the ling zhi herb page.

Reishi mushroom (ling zhi)

Thermal nature: Neutral (slightly warm)
Flavour: Sweet, bitter
Channels entered: Heart, Liver, Lung
Actions: Calms the spirit (shen); tonifies qi and nourishes blood; stops cough and wheezing; supports the constitution

Reishi's defining action in TCM is on the shen — the spirit or consciousness housed by the Heart. It is a calming tonic rather than a stimulating one, which distinguishes it from ginseng and from most of what the modern supplement market groups together as "adaptogens". Its effects are cumulative and slow: this is a tea for weeks and months, not for an afternoon.

4. Traditional uses

Poor sleep with an overactive mind

The classical indication. Difficulty falling asleep because the mind will not stop, restless dream-disturbed sleep, palpitations and anxiety map onto Heart shen disturbance in TCM. Reishi is the standard calming tonic for this picture. It is not sedating in the way a sleeping tablet is — it works gradually over weeks, and it is a complementary measure alongside conventional care for anyone with a diagnosed sleep disorder.

Prolonged stress and depletion

Long periods of overwork, broken sleep and sustained pressure produce a picture of qi and blood depletion with an unsettled spirit — tired but wired, exhausted yet unable to rest. Reishi's combination of tonifying and calming actions suits this pattern better than a purely stimulating tonic, which tends to make the agitation worse.

Chronic cough and wheezing

Reishi has a long traditional use for chronic cough and wheezing, particularly the lingering, weak, breathless kind associated with Lung qi deficiency rather than acute infection. It appears in Chinese formulas for chronic bronchitis and asthma in this supportive role, alongside conventional treatment rather than in place of it.

General constitutional support

Much of reishi's traditional use is non-specific — it is taken to strengthen the constitution over time rather than to treat a named complaint. This is how it is most often used in Chinese homes: a daily or near-daily tea drunk over months, particularly by older adults and during periods of recovery.

5. Ingredients

3–5 dried reishi slices, about 5–10g
750ml water — more than for other teas, as much of it boils away
Optional: 3–4 red dates, halved, to soften the bitterness
Optional: 1 tbsp goji berries, added at the end
Optional: honey, stirred in once the tea has cooled slightly

Buy pre-sliced dried reishi — the whole fruiting body is too hard to cut at home without a saw. Slices should be firm and woody with a glossy red-brown cap surface and a pale underside; avoid anything soft, mouldy or holed by insects. Red reishi (chi zhi) is the common medicinal variety. Reishi is also widely sold as powder, capsules and extracts, which are convenient but are a supplement rather than a tea — and dosing them is a different question from brewing a cup.

6. Method

Rinse the slices briefly under cold water.
Place in a pan with 750ml water.
Bring to the boil, then reduce to a low simmer.
Simmer 45–60 minutes, until the liquid has reduced by roughly a third and turned deep amber-brown. Reishi is woody and will not give up much in a short steep.
Add red dates for the last 20 minutes and goji for the last 5.
Strain and drink warm. Honey can be stirred in once it has cooled a little.

The same slices can be simmered a second time with fresh water for a weaker but still usable pot. Brewed reishi keeps in the fridge for two days, so a single long simmer can cover several days' drinking — which is how most people manage a tea that takes an hour to make.

7. Variations and pairings

With red dates and goji: the standard domestic combination, and much easier to drink than reishi alone.
With liquorice: a small piece markedly reduces the bitterness — see liquorice tea for its cautions, which matter here.
With longan: adds a sweet, blood-nourishing dimension for poor sleep with fatigue — see longan tea.
In a slow cooker: practical for the long simmer; leave on low for 3–4 hours.
In broth: reishi slices can be simmered into a chicken or vegetable stock, which is a common way of taking it in Chinese kitchens without drinking it as a tea at all.

8. When to drink it

Poor sleep with a racing mind, over a period of weeks
Sustained stress, overwork and nervous exhaustion
Chronic weak cough and breathlessness, alongside conventional care
General constitutional support in older adults
Periods of convalescence and recovery

Evening suits reishi best, given its calming direction, though it is caffeine-free and can be drunk at any time. Expect to drink it daily for several weeks before judging it — this is a slow tonic, and a single cup will not do much. One cup a day is a normal amount.

9. Cautions and contraindications

Anticoagulants and antiplatelet drugs: reishi may inhibit platelet aggregation. If you take warfarin, aspirin, clopidogrel or a DOAC, speak to your prescriber before drinking it regularly.
Surgery: stop at least two weeks before any planned operation because of the bleeding risk.
Blood pressure medication: reishi may lower blood pressure; effects could be additive.
Immunosuppressant medication: reishi is immune-modulating. Avoid if you take immunosuppressants or have had a transplant, without specialist advice.
Pregnancy and breastfeeding: not enough is known; avoid.
Mushroom allergy: avoid if you react to mushrooms or fungal spores.
Side effects: dry mouth, throat and nose, dizziness or upset stomach are reported, usually early on and usually settling. Stop if they persist.
Not a cancer treatment: despite widespread marketing, reishi must never replace conventional oncology care. Discuss any supplement with your oncology team, as interactions with treatment are possible.

10. Frequently asked questions

Why is it so bitter?

That is simply what reishi tastes like — the triterpenes responsible for much of its research interest are also what make it bitter. Red dates, goji or a little honey make it far more drinkable. Sweetness is not a sign of quality here; if anything the reverse.

Tea, powder or capsules?

The tea is the traditional preparation and the one this page covers. Powders and extracts are convenient and often more concentrated, but they are supplements with their own dosing questions rather than a food-therapy measure, and quality varies a great deal between brands.

How long before I notice anything?

Reishi is a slow tonic. Traditional use assumes weeks to months of regular drinking, not days. If you are looking for something with an immediate effect, this is the wrong substance.

Can I drink it every day?

Yes — it sits in the classical "superior" category intended for long-term use, and daily drinking over months is the traditional pattern. The cautions above still apply, particularly around blood-thinning medication.

Is reishi an adaptogen?

"Adaptogen" is a modern Western category, not a TCM one. Reishi is often marketed that way, but in Chinese medicine it is classified by its actions — calming the spirit, tonifying qi — which is a more precise description of how it is actually used.