What Is Tiger Milk Mushroom? A Rare Fungus Explained

A fungus with a folk-tale name

Tiger milk mushroom is the common name of a fungus found in the tropical forests of Southeast Asia, particularly in Malaysia, Indonesia, Thailand and southern China. Its most widely used scientific name is Lignosus rhinocerus, although labels sometimes use related names for closely similar species in the same genus.

The name comes from folklore. According to local stories, the mushroom was said to grow where a tigress had dripped her milk while feeding her cubs in the forest. Whether or not you take the tale seriously, it explains the unusual name and shows how long people in the region have known the fungus.

Tiger Milk Mushroom is named in the LungFresh botanical blend. This explainer describes what it is, where it grows and how its name appears on a label.

The part that matters: the sclerotium

Most of us think of a mushroom as a cap on a stalk. Tiger milk mushroom has one of those, a small, leathery, funnel-shaped fruiting body that appears above ground after rain. But the part used in products is not the cap. It is the sclerotium, a hard, dense underground structure.

A sclerotium is a compact mass of fungal tissue that some fungi form as a food reserve and survival structure. In tiger milk mushroom it develops beneath the soil near rotting wood, and it is a pale, dense, roughly potato-shaped lump that can be dug up carefully. It is this part that is dried, ground and processed.

You may therefore notice labels that say Tiger Milk Mushroom Sclerotium or Lignosus rhinocerus (sclerotium) instead of simply mushroom. They refer to the same thing.

• Fruiting body: the small funnel-shaped cap above ground
• Sclerotium: the dense underground mass
• Used in ingredients: the sclerotium, dried and milled

Where it grows and how it is sourced

In the wild, tiger milk mushroom grows in humid lowland forest, usually in soil near decaying wood. It is not common, and finding it in the forest depends on timing, local knowledge and plenty of patience. That scarcity is part of why it has a sense of mystery in the stories told about it.

In recent decades, growers in Malaysia and elsewhere have learned to cultivate the fungus under controlled settings, so that supply does not depend entirely on wild collection. Cultivation typically involves growing the fungus on a substrate in a farm setting and harvesting the sclerotia when mature.

Ingredient suppliers dry the sclerotia and mill them into powder, which can be used directly or processed into an extract.

Mushrooms, fungi and labels

Mushrooms belong to the fungus kingdom, which is separate from both plants and animals. This is why a Supplement Facts panel might describe a mushroom ingredient quite differently from a leaf or a bark. The label cannot say leaf or root, so it names the structure used: fruiting body, mycelium or sclerotium.

Those three terms are worth knowing. The fruiting body is the visible mushroom. Mycelium is the thread-like network of the fungus that spreads through its growing material. A sclerotium is the hardened mass described above. Each is a different material, and good labels say which one is in the product.

Tiger milk mushroom is a good example of a mushroom whose label detail really matters, since the sclerotium is the part associated with it.

It also helps to know that mushroom names can be confusing. The same fungus may carry several common names in different countries, such as tiger milk mushroom, tiger's milk or the local Malay name cendawan susu rimau. Because common names vary, the Latin name in brackets is the most dependable way to confirm which fungus a label means, and many brands include it for that reason.

The fungus is also a reminder that ingredients come from many corners of the natural world. A single bottle can include a vitamin, a mineral, a leaf, a tree bark, a root, a mushroom and a plant compound, each with its own story and its own style of label name

How it appears on the LungFresh label

On the LungFresh Supplement Facts panel, Tiger Milk Mushroom appears in the botanical blend after Stinging Nettle Root and before Quercetin and Black Pepper Fruit Extract. The full blend lists Mullein Leaf, Pineapple Stem, Maritime Pine Bark, Stinging Nettle Root, Tiger Milk Mushroom, Quercetin and Black Pepper Fruit Extract.

As with any blend, the panel shows the total amount for the group, and the ingredients are listed in descending order by amount. The exact figures and wording are printed on the bottle, which is the right place to check.

LungFresh is a daily dietary supplement in capsule form for adults. The brand suggests two capsules each day with a glass of water, about six to eight ounces, or as the label directs.

A tidy way to remember it

If mushroom terms feel new, a simple three-part summary helps. Think of tiger milk mushroom as a rare forest fungus, a dense underground sclerotium, and a name that comes from a folk tale.

When you meet the name on a label, a quick check of the Latin name, the part used and the form will tell you almost everything a label can tell you about it.

Finally, remember that the product is meant to be part of a simple daily routine. Bottles hold 60 capsules, which is a 30-day supply at the suggested use, and they should be stored in a cool, dry place.

• Latin name: Lignosus rhinocerus
• Part used: sclerotium
• Origin: tropical forests of Southeast Asia
• Form: dried powder or extract