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Why Fruiting Bodies in Products are Better for You Than Mycelium: The Substrate Factor

Mushrooms have been celebrated for their nutritional and medicinal benefits for centuries. In recent years, they've found their way into a wide array of products, from dietary supplements to teas and coffees. However, a critical debate within the mushroom community is whether fruiting bodies or mycelium are more beneficial for health. The substrate on which these fungi grow plays a pivotal role in this discussion. Here's why fruiting bodies often come out on top.


Understanding Fruiting Bodies and Mycelium

Before diving into the substrate's impact, let's clarify the difference between fruiting bodies and mycelium:

  • Fruiting Bodies: These are the visible, above-ground parts of mushrooms. When you picture a mushroom, you’re likely thinking of the fruiting body.

  • Mycelium: This is the vegetative part of the fungus, consisting of a network of fine white filaments (hyphae) that grow underground or within the substrate.

The Role of Substrate

Substrate refers to the material on which fungi grow. Common substrates include wood, straw, compost, or grains such as oat or rice . The quality and composition of the substrate directly influence the nutritional profile and potency of the mushroom products.


1. Rich Nutrient Profile in Fruiting Bodies: Fruiting bodies typically have a higher concentration of beneficial compounds, such as beta-glucans, triterpenoids, and polysaccharides. These compounds are known for their immune-boosting, anti-inflammatory, and antioxidant properties. Fruiting bodies often develop these compounds in response to environmental stressors, which are more prevalent above ground.

2. Substrate Contamination in Mycelium-Based Products: Mycelium is often grown on grain-based substrates. When harvested, mycelium-based products can contain significant amounts of the substrate itself. This means that a portion of the supplement you consume might not be mycelium at all, but rather the residual grains. This dilutes the concentration of active compounds, reducing the overall efficacy.

3. Bioactive Compounds in Fruiting Bodies: Research indicates that fruiting bodies contain a broader spectrum of bioactive compounds compared to mycelium. These compounds are not just more diverse but also more bioavailable, meaning your body can absorb and utilize them more effectively.

4. Substrate's Impact on Mycelium Quality: The substrate on which mycelium grows can significantly impact its quality. Grains, often used for cost-effective production, might lead to higher starch content in the final product. This starch does not contribute to the therapeutic properties of the mushroom and can be seen as filler, reducing the supplement's overall potency.

5. Higher Purity in Fruiting Body Extracts: Fruiting body extracts are generally purer. Since they grow above ground, there’s less risk of contamination from the substrate. This means you’re getting a more concentrated dose of the mushroom’s beneficial compounds without unwanted extras.

6. Mycelium's Susceptibility to Contaminants: Mycelium grown in substrate can accumulate contaminants from the growing medium. If the substrate is not of high quality or contains pesticides or heavy metals, these can end up in the final product. Fruiting bodies, being more selective in their nutrient uptake, often present a cleaner, safer option.


While both fruiting bodies and mycelium have their place in mushroom-based products, fruiting bodies often provide a superior choice when considering the impact of the substrate. They offer a richer, more potent array of bioactive compounds, greater purity, and better bioavailability. When choosing mushroom supplements or products, opting for those derived from fruiting bodies can ensure you’re getting the most health benefits from these extraordinary fungi.

Incorporating high-quality fruiting body extracts into your diet can harness the full power of mushrooms, supporting your immune system, enhancing vitality, and promoting overall well-being.

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