
Mushrooms are the fruiting bodies of fungi that contain spores, which are dispersed for reproduction. They are formed from hyphae, the tiny threads that make up the bulk of most fungi. The mycelium, or the 'root' of a mushroom, collects and utilises nutrients, acting as its immune system. The mushroom fruit body is the reproductive stage that produces spores, similar to how a plant's flower produces pollen or seeds for reproduction and propagation. While the fruit body is easily identifiable, the mycelium is less well-known outside of mycology circles. Both the mushroom mycelium and fruit body offer health benefits, and the choice between the two depends on the desired bioactive compounds and nutrients.
| Characteristics | Values |
|---|---|
| Definition | The cap and stem that most people identify as a mushroom is the fruiting body or reproductive structure of a larger fungal organism. |
| Composition | Mushrooms are formed from hyphae, the tiny threads that make up most fungi. |
| Formation | Mushrooms begin their lives as spores, which are like "seeds". Spores are carried by wind, water, or creatures to an ideal spot where they grow into mycelium, which then grows into mushrooms. |
| Mycelium | The "root" of a mushroom, responsible for collecting and utilizing nutrients, warding off predators, and other defensive tasks. It is like the mushroom's immune system. |
| Spores | Produced by the fruiting body, spores are the reproductive parts of a mushroom, dispersed through the air or carried on a host. |
| Gills | Found under the caps of some mushroom fruiting bodies, these ridges help disperse spores. |
| Medicinal Properties | Fruiting bodies have been used by humans for their medicinal properties for a long time. They can bolster the immune system, promote longevity, and support overall health. |
| Perishability | Fruiting bodies are highly perishable and can rot quickly, while the mycelium can live for months, years, or decades. |
| Taste | Fruiting body extracts are bitter and earthy, while mycelium grown on grain is sweeter. |
| Commercial Use | Fruiting body extracts are more expensive and time-consuming to produce. Mycelium is easier to formulate with and costs about 10 times less than fruiting body extracts. |
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What You'll Learn

Mushrooms are the fruiting bodies of fungi
The part of the mushroom that most people identify as a "mushroom"—the cap and stem—is actually just the fruiting body. The majority of the fungus exists underground or in the material the mushroom is growing from, such as wood. This network of tiny threads that make up the bulk of the fungus is called hyphae, and when they combine, they form a mycelium, which is like the root system of the mushroom. The mycelium is responsible for collecting and utilizing nutrients, releasing enzymes, and defending the fungus from predators.
Once the spores find an ideal spot, they start to grow into mycelium. The mycelium then grows into mushrooms, or the fruiting bodies. When the fruiting bodies are mature, they make and release spores, continuing the life cycle as the fruiting body begins to decline.
Mushroom fruiting bodies have been traditionally used by humans as food and for health benefits. They are easily identifiable, and their distinct shape and form have made them marketable. However, both the mushroom mycelium and the fruiting body offer benefits to human health. For example, medicinal mushrooms have been found to bolster the immune system, promote longevity, and support overall health.
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Fruiting bodies are highly perishable
Mushrooms are the fruiting bodies of fungi. The part of the mushroom that is visible to the naked eye is the fruiting body. This is the reproductive structure of a larger fungal organism. The mycelium, or the "root" of a mushroom, grows into the mushroom's fruiting body. The mycelium is like the mushroom's immune system, tasked with collecting and using nutrients, releasing enzymes, and warding off predators and other defensive tasks. The mycelium also helps the mushroom grow strong and dense and aids in communication.
Once the mycelium matures, it grows into the mushroom's fruiting body. The fruiting body then makes spores and releases them, continuing the life cycle as the fruiting body begins its decline. The gills under the cap of the mushroom's fruiting body help disperse the spores.
The perishable nature of fruiting bodies poses challenges for companies producing mushroom supplements. While the fruiting body is considered to possess a great number of benefits, it is extremely bitter and earthy in taste. As a result, supplement companies have to put in extra effort to pair fruiting bodies with other ingredients to overcome the bitter taste. Additionally, using the fruiting body is much more expensive and time-consuming than utilizing the mycelium.
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Mycelium is the root system of fungi
Mushrooms are a type of fungus, and the part that most people identify as a mushroom is actually the fruiting body, or the reproductive structure of a larger fungal organism. The mushroom fruit body produces spores, similar to how a plant's flower or fruit produces pollen or seeds for reproduction and propagation of the species.
The mycelium is the network of tiny threads or filaments that make up the bulk of the fungus and extend in all directions through the soil. It is often referred to as the "root" or root-like structure of the mushroom, tasked with collecting and using nutrients, releasing enzymes, and defending against predators. Mycelium is like the mushroom's immune system, helping it grow strong and dense, and facilitating communication.
The process of producing a mushroom fruiting body requires the mycelium to maintain a highly active immune response to prevent pathogens from harming it. The mycelium itself can live for months, years, or even decades, while the mushroom fruit bodies that form are highly perishable and only viable for a few days.
Both the mycelium and the mushroom fruit body offer potential health benefits to humans. The mycelium, for example, has been found to contain immunologically supportive compounds, while the fruit bodies have been traditionally used for food and health support.
In the context of mushroom supplements, there is an ongoing discussion about the benefits of using fruiting bodies versus mycelium. Some companies emphasize the use of fruiting bodies due to their high beta-glucan content, while others argue that mycelium-based supplements can provide a wider range of beneficial compounds. The choice between the two depends on the specific needs and goals of the consumer.
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Fruiting bodies are used in supplements
Mushrooms are the fruiting bodies of fungi that contain spores, which are dispersed for reproduction. The cap and stem that most people identify as a mushroom is the reproductive structure of a larger fungal organism. The majority of the fungus exists underground or in the wood, soil, or other materials the mushroom is growing from.
Fruiting bodies have a long history of human use, and they are used in supplements for their medicinal properties. Chaga (Inonotus obliquus), Reishi (Ganoderma lucidum), Turkey Tail (Trametes versicolor), Maitake (Grifola frondosa), and Shiitake (Lentinula edodes) have all been found to bolster the immune system, promote longevity, and support overall health. Cordyceps (Cordyceps militaris) boosts energy and virility, while Lion’s Mane (Hericium erinaceus) has the potential to relieve cognitive impairment, Alzheimer’s, and dementia, and can assist in nervous system trauma recovery. Many of these medicinal mushrooms are also helpful in the prevention and treatment of diabetes and cancer, and can increase protection against viral, bacterial, fungal, and parasitic infections.
The benefits of mushroom supplements depend on the type of mushroom and the specific needs of the individual. It is important to note that not all mushroom supplements are created equal, and some may be more effective than others. Additionally, while fruit bodies have a long history of human use, humans have only been able to grow the mycelium from an isolated species for about 100 years. The mycelium, or network of hyphae, is the primary function of the organism, and it is also used in supplements. Both the mushroom mycelium and the mushroom fruit body offer benefits to human health. For example, the immunological activity of Host Defense® mushroom mycelium-based supplements is due to beta-glucan content, as well as a range of polysaccharides and novel compounds responsible for immune activation and modulation.
Fomitopsis officinalis is a medicinal mushroom used in traditional European eighteenth and nineteenth-century folk medicine. Fruiting bodies of F. officinalis were collected from the natural environment for their medicinal properties. The presence of organic compounds, bioelements, antioxidant properties, and antiproliferative activity were all confirmed in the mycelium and fruiting bodies of F. officinalis.
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Fruiting bodies are bitter-tasting
Mushrooms are the fruiting bodies of fungi that contain spores, which are dispersed for reproduction. The cap and stem that most people identify as a mushroom is actually the fruiting body or reproductive structure of a larger fungal organism. The mushroom fruit body is the reproductive stage that produces spores, similar to how a plant's flower or fruit reproduces and propagates the species.
Fruiting bodies have a long history of human use, and many types of mushrooms have been found to bolster the immune system, promote longevity, and support overall health. However, not all mushrooms are beneficial. Some mushrooms contain bitter-tasting compounds that can be unpleasant to the taste. For example, the bitter bracket mushroom (Amaropostia stiptica) is known for its intensely bitter taste. This mushroom grows on the trunks and branches of dead trees and has a shelf-like fruiting body.
While the bitter taste of some mushrooms may be off-putting to some, it is important to note that not all bitter compounds are toxic, and not all toxins taste bitter. For example, the death cap mushroom contains toxins that do not have a bitter taste. Bitter taste receptors, called TAS2Rs, are found not only on the tongue but also in other parts of the body, such as the stomach, intestines, heart, and lungs. These receptors may serve a warning function to protect us from potentially harmful substances.
The bitter compounds found in mushrooms, such as the bitter bracket mushroom, can provide valuable insights into how our bodies sense bitterness and how we can develop methods to identify new bitter compounds and predict their effects. By studying these bitter compounds, scientists can gain a better understanding of the complex ways in which our bodies recognize and respond to bitter molecules.
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Frequently asked questions
The mushroom fruit body is the reproductive stage of a mushroom that produces spores, similar to how a plant's flower or fruit produces pollen or seeds. The mushroom cap and stem that most people identify as a mushroom is the fruiting body, or reproductive structure of a larger fungal organism.
The mushroom fruiting body is the above-ground part of a mushroom that is visible to the naked eye. Mycelium, on the other hand, is like the root of a mushroom, responsible for collecting and utilizing nutrients, and acting as its immune system.
Both mushroom fruiting bodies and mycelium are used in supplements, and both offer benefits to human health. However, companies that make mushroom supplements from fruit bodies often emphasize the high beta-glucan content found in them.
Yes, fruiting body extracts tend to be extremely bitter and earthy, while mycelium grown on grain has a sweeter taste, often described as similar to sweet rice.

























