# Black Hoof Mushroom (Phellinus linteus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/black-hoof-mushroom
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Mushroom/Fungi
**Also Known As:** Phellinus linteus, Sang Hwang, Sanghwang, Song Gen, Meshimakobu, Mulberry Bracket Fungus, Black Hoof Bracket, Phellinus igniarius, Korean Black Mushroom

## Overview

Black Hoof Mushroom (Phellinus linteus) is a medicinal fungus whose primary bioactive compounds—polysaccharides, hispolon, and interfungins—modulate immune signaling, inhibit [inflammatory](/ingredients/condition/inflammation) COX-2 and iNOS pathways, and demonstrate [antioxidant](/ingredients/condition/antioxidant) and hypoglycemic activity. Research across cell, animal, and limited human models suggests applications in blood sugar regulation, bone [metabolism](/ingredients/condition/weight-management), and [immune modulation](/ingredients/condition/immune-support), though robust clinical trials in humans remain scarce.

## Health Benefits

• May support healthy blood sugar levels - animal studies showed 41.13% reduction in serum glucose in diabetic rats (preliminary evidence)
• Potential [bone health](/ingredients/condition/bone-health) support - ethanol extract increased bone mineral accumulation and ALP activity in ovariectomized rats (preliminary evidence)
• [Immune system](/ingredients/condition/immune-support) modulation - polysaccharides stimulated nitric oxide production and macrophage activity in laboratory studies (preliminary evidence)
• Possible radioprotective effects - oral extracts helped restore body weight and blood parameters in irradiated mice (preliminary evidence)
• Traditional anticancer support - case reports describe tumor regression in individual patients, though no controlled trials exist (anecdotal evidence only)

## Mechanism of Action

Phellinus linteus polysaccharides bind pattern-recognition receptors such as Dectin-1 and TLR-4 on macrophages and dendritic cells, upregulating cytokines including TNF-α, IL-6, and IL-12 to potentiate innate and adaptive immune responses. The phenolic compound hispolon suppresses NF-κB nuclear translocation and downregulates COX-2 and iNOS enzyme expression, reducing [prostaglandin](/ingredients/condition/inflammation) E2 and nitric oxide synthesis. Additionally, Phellinus linteus extracts appear to inhibit α-glucosidase activity and enhance pancreatic β-cell insulin secretion, contributing to the observed hypoglycemic effects in animal models.

## Clinical Summary

Most available evidence derives from in vitro cell studies and rodent models; a key animal study demonstrated a 41.13% reduction in serum glucose in streptozotocin-induced diabetic rats following Phellinus linteus polysaccharide administration. Bone health findings come from ovariectomized rat models where ethanol extracts significantly increased [bone mineral density](/ingredients/condition/bone-health) and alkaline phosphatase (ALP) activity, an enzyme marker of osteoblast function. [Immunomodulatory](/ingredients/condition/immune-support) effects—including NK cell activation and [cytokine](/ingredients/condition/inflammation) upregulation—have been documented in murine studies and limited ex vivo human cell assays, but no large randomized controlled trials in humans have been completed to date. The overall evidence base is preliminary, and clinical translation requires rigorous human trials before efficacy claims can be firmly established.

## Nutritional Profile

Black Hoof Mushroom (Phellinus linteus) is a medicinal fungus with a composition dominated by bioactive polysaccharides rather than conventional macronutrients. Dry weight analysis indicates approximately 50-60% total carbohydrates (primarily as [beta-glucan](/ingredients/condition/immune-support)s and heteropolysaccharides), 10-15% crude protein (containing all essential amino acids at modest concentrations), 2-5% crude fat (predominantly unsaturated fatty acids including linoleic acid), and 15-25% dietary fiber. Ash content ranges from 5-8%, reflecting mineral density. Key bioactive polysaccharides include beta-(1→3)(1→6)-D-glucans estimated at 20-30% dry weight, along with proteoglycans and heteroglycans including hispolon-linked polysaccharides. Phenolic compounds are notable, including hispolon (a polyhydroxylated yellow pigment), caffeic acid, and protocatechuic acid at concentrations reported in the range of 0.5-2.0 mg/g dry weight combined. Triterpenoids such as inotodiols and lanosterol derivatives are present at approximately 0.1-0.5% dry weight. Mineral content includes potassium (~800-1200 mg/100g dry weight), magnesium (~50-100 mg/100g), calcium (~20-60 mg/100g), zinc (~5-10 mg/100g), and selenium at trace levels (~0.02-0.05 mg/100g). Ergosterol (provitamin D2 precursor) is present at approximately 0.1-0.3% dry weight, convertible to vitamin D2 upon UV exposure. B-vitamins are present at low levels including riboflavin (~0.3-0.5 mg/100g dry weight) and niacin (~5-8 mg/100g dry weight). Bioavailability note: High-molecular-weight polysaccharides (>100 kDa) have limited direct intestinal absorption and likely exert effects via [gut microbiome](/ingredients/condition/gut-health) modulation and intestinal immune receptor interaction (Peyer's patches, TLR-4 signaling); hot water extraction significantly improves polysaccharide bioavailability compared to raw consumption. Alcohol extraction preferentially isolates terpenoids and phenolics with comparatively higher systemic bioavailability.

## Dosage & Preparation

No clinically studied human dosages exist. Animal studies used hot water extracts at unspecified doses for diabetes, ethanol extracts for 12 weeks for [bone health](/ingredients/condition/bone-health), and 500-1500 mg/kg daily for radioprotection in mice. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Black Hoof Mushroom is generally considered well tolerated in traditional use contexts, but systematic human safety data are lacking; reported adverse effects are rare and include mild gastrointestinal discomfort at high doses. Due to its hypoglycemic activity demonstrated in animal studies, concurrent use with insulin or oral antidiabetic agents such as metformin or sulfonylureas may theoretically increase risk of hypoglycemia, and [blood glucose](/ingredients/condition/weight-management) monitoring is advisable. Phellinus linteus exhibits immunostimulatory properties, making it a potential concern for individuals on immunosuppressive therapies—such as cyclosporine or tacrolimus following organ transplantation—as it may counteract drug efficacy. Safety during pregnancy and lactation has not been established; use should be avoided in these populations pending adequate safety research.

## Scientific Research

No randomized controlled trials or meta-analyses have been conducted on Black Hoof Mushroom in humans. Evidence is limited to preclinical animal studies including diabetic rats (PMID: 27481296), [osteoporosis](/ingredients/condition/bone-health) models (PMID: 27279443), and radioprotection in mice (PMID: 27649604), plus isolated case reports of cancer patients.

## Historical & Cultural Context

Black Hoof Mushroom has been used for centuries in Oriental traditional medicine systems, particularly in Korean and Japanese folk medicine, as an anticancer and [immunomodulatory](/ingredients/condition/immune-support) agent. Historical applications primarily targeted tumors, with modern case reports reflecting ongoing traditional use alongside conventional cancer therapies.

## Synergistic Combinations

Reishi mushroom, Turkey tail mushroom, Maitake mushroom, Vitamin D3, [Beta-glucan](/ingredients/condition/immune-support)s

## Frequently Asked Questions

### What is black hoof mushroom used for?

Black Hoof Mushroom (Phellinus linteus) is used primarily for immune support, blood sugar regulation, and anti-inflammatory purposes based on traditional Korean and Chinese medicine applications. Modern research in animal and cell models supports its polysaccharides and hispolon as active agents that stimulate immune cytokine production and suppress inflammatory enzymes like COX-2 and iNOS, though human clinical evidence is still limited.

### Can black hoof mushroom lower blood sugar?

Animal research found that Phellinus linteus polysaccharides reduced serum glucose by approximately 41.13% in streptozotocin-induced diabetic rats, likely through α-glucosidase inhibition and enhancement of insulin secretion from pancreatic β-cells. However, these findings have not been replicated in human clinical trials, so it should not replace prescribed antidiabetic medications, and people on diabetes drugs should consult a physician before use due to potential additive hypoglycemic effects.

### What are the active compounds in Phellinus linteus?

The primary bioactive compounds in Phellinus linteus include beta-glucan polysaccharides (particularly proteoglycans), hispolon (a polyphenol), interfungins A and B, phelligridins, and various triterpenoids. Hispolon is especially studied for its anti-inflammatory and potential anticancer properties via NF-κB pathway inhibition, while the polysaccharides are responsible for most observed immunomodulatory effects through TLR-4 and Dectin-1 receptor activation.

### Does black hoof mushroom support bone health?

Preliminary evidence from an ovariectomized rat model—which mimics postmenopausal bone loss—showed that Phellinus linteus ethanol extract significantly increased bone mineral accumulation and elevated alkaline phosphatase (ALP) activity, a biomarker of osteoblast function. These findings suggest a potential role in supporting bone density, but no human studies have confirmed this effect, and it should not be considered a substitute for clinically validated osteoporosis treatments.

### Is black hoof mushroom safe to take with medications?

Phellinus linteus may interact with immunosuppressive drugs like cyclosporine or tacrolimus because its polysaccharides stimulate immune activity, potentially reducing drug efficacy in transplant or autoimmune patients. Its hypoglycemic properties also raise concern for additive effects when combined with insulin, metformin, or sulfonylureas, increasing hypoglycemia risk. Always consult a healthcare provider before combining this mushroom with any prescription medication.

### What is the difference between black hoof mushroom extract and whole mushroom powder?

Black hoof mushroom extracts concentrate the bioactive polysaccharides and beta-glucans through solvent extraction methods (typically ethanol or water), making them more potent per dose than whole mushroom powder. Clinical studies showing the 41% blood sugar reduction and bone health benefits primarily used standardized extracts rather than raw powder forms. Extracts typically deliver higher concentrations of active compounds in smaller serving sizes, though whole powder retains some fiber and nutritional content that extracts may not.

### Is black hoof mushroom safe for children and pregnant women?

Safety data for black hoof mushroom in children and during pregnancy is limited, as most research has been conducted in animal models or adult populations. Pregnant and nursing women should consult a healthcare provider before use, as immune-stimulating polysaccharides may have unpredictable effects during these sensitive periods. Children may require dose adjustments based on body weight, but specific pediatric dosing guidelines for Phellinus linteus have not been established in clinical literature.

### How strong is the scientific evidence supporting black hoof mushroom's health benefits?

Current evidence for black hoof mushroom is primarily preliminary, based on animal studies and laboratory research rather than human clinical trials. The 41% glucose reduction and bone mineralization improvements were demonstrated in diabetic rats and ovariectomized rats respectively, which cannot be directly translated to human efficacy without human clinical confirmation. While the traditional use history and in vitro immune modulation data are promising, larger, peer-reviewed human studies are needed to establish efficacy and optimal dosing for supplement use.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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