Reishi: The "Mushroom of Immortality" and Its Place in Tradition
Of all the functional mushrooms on the shelf today, none carries a reputation quite like Reishi. For two thousand years it has been among the most revered substances in Chinese tradition, valued so highly that it appears in imperial art, classical poetry and Taoist philosophy as a symbol of longevity and good fortune. It even earned a name few foods could live up to: the mushroom of immortality. This article looks at what Reishi actually is, where that extraordinary reputation came from, why you'll never find it on a dinner plate, and how people take it today.
What Reishi Is
Reishi is the Japanese name that stuck in the West. In China, where its history runs deepest, it's known as Lingzhi, and its botanical name is Ganoderma lucidum. It grows on hardwood, particularly old or dying trees, and looks nothing like a supermarket mushroom: a hard, woody, kidney-shaped bracket with a glossy, lacquered surface in deep reds and browns, as though it has been varnished. That distinctive shine gives it the alternative name "the varnished conk" and is a large part of why it appears so often in Chinese art.
Wild Reishi is rare, which matters to the story. For most of its history it was scarce enough that ordinary people were unlikely ever to find one, and it was associated with emperors, court physicians and the wealthy. Cultivation only became reliable in the second half of the twentieth century, which is the reason a mushroom once reserved for royalty now sits in high street supplements.
Where the Reputation Came From
Reishi's standing in Chinese tradition is unusually well documented. The Shennong Ben Cao Jing, the oldest surviving Chinese materia medica and around two thousand years old, sorted its entries into three grades. The "superior" class was reserved for substances considered gentle enough for long-term daily use, taken not to address anything specific but as tonics for general wellbeing over a lifetime. Reishi was placed in that superior class, and the text described it in glowing terms.
From there it entered Taoist thought, where longevity and the cultivation of vitality were central preoccupations, and it became a symbol as much as a substance. Reishi appears carved into furniture, woven into imperial robes, held by deities in paintings, and rendered in jade, always signifying long life and good fortune. The cloud-like shapes in traditional Chinese art known as ruyi are widely thought to be stylised Reishi caps. Few ingredients anywhere have been embedded so thoroughly in a culture's visual language.
It's worth being clear about what that pedigree is and isn't. Two thousand years of reverence is a remarkable cultural fact, not a modern scientific finding. Reishi is an active area of research today, and it remains an area of ongoing study rather than settled conclusions.
Why Nobody Cooks With It
Unlike Maitake or Shiitake, which are genuinely excellent food, Reishi has never been a culinary mushroom, and one bite explains why. It is hard as wood, tough enough that fresh specimens are typically cut with a knife rather than picked apart, and profoundly bitter. Nothing about it invites frying.
Traditionally, this was worked around by decoction: slices of dried Reishi simmered in water for an extended period to draw the compounds out of that woody structure, producing a dark, bitter tea. This remains the traditional preparation, and our sliced dried Reishi is exactly what you'd use for it: a few slices simmered gently for 30 minutes to two hours, often with jujube dates or liquorice root added to soften the bitterness, which is how it has been drunk for centuries.
That bitterness is also the practical reason Reishi is so commonly taken as a supplement rather than a food. It's one of the clearest cases where capsules exist for a genuine reason rather than convenience alone.
How People Take It Today
The format question comes down to the same thing it always does, which routine you'll actually keep. Reishi capsules are the simplest and by far the most popular option, sidestepping the taste entirely and slotting into a daily routine with no preparation. Reishi powder suits anyone who wants to add it to a drink they're already making, though its bitterness is more assertive than milder mushrooms, so it works best in something with body to carry it. And the dried slices are for anyone drawn to the traditional decoction and happy to give it the time, which is a genuinely pleasant ritual for the right sort of person.
Whichever route you take, Reishi belongs to the class of things the tradition always framed as long-game: taken steadily over weeks and months rather than judged on a single cup. That was the whole logic of the "superior" grade it was placed in two millennia ago, and as we covered in our recent piece on where functional mushrooms fit the adaptogen trend, it's the same principle the modern category rests on.
Frequently Asked Questions
What is Reishi mushroom?
Reishi (Ganoderma lucidum, known as Lingzhi in China) is a hard, woody, glossy bracket fungus that grows on hardwood. It has around two thousand years of documented use in Chinese tradition as a tonic substance.
Why is it called the mushroom of immortality?
The name comes from its status in Chinese and Taoist tradition, where it symbolised longevity and good fortune. It reflects cultural reverence rather than any modern claim.
Can you eat Reishi?
Not in any ordinary sense. It's woody and very bitter, so it has traditionally been prepared as a simmered decoction rather than cooked as food, which is why supplement formats are so common.
What's the difference between Reishi and Lingzhi?
They're the same mushroom. Reishi is the Japanese name, Lingzhi the Chinese one, and Ganoderma lucidum the botanical name.
How do you make Reishi tea?
Simmer a few dried slices in water for 30 minutes to two hours. Jujube dates or liquorice root are traditionally added to temper the bitterness.
Capsules, powder or dried slices?
Capsules are the easiest daily habit and avoid the taste, powder suits adding to drinks, and dried slices are for the traditional simmered preparation. All deliver the same mushroom.
Two thousand years of continuous reverence is a rare thing for any ingredient. Explore the full Reishi range and find the format that fits your routine.
