Diatomaceous Earth (DE) is a naturally occurring, fine powder derived from the fossilized remains of microscopic aquatic organisms called diatoms. Composed primarily of silica, this sedimentary rock material has gained popularity in alternative health circles as a supplement for internal detoxification and addressing internal fungal overgrowth. Determining if DE can effectively kill mold or other internal fungal pathogens requires examining its mechanism of action compared to the biological environment of the human body.
Understanding Diatomaceous Earth Composition and Action
Diatomaceous Earth is made up of the silica-based skeletons of diatoms, which accumulate over millions of years. The resulting powder consists of sharp, abrasive particles with a highly porous structure, giving DE its efficacy as a mechanical insecticide.
When used for external pest control, the microscopic particles physically damage the waxy, protective outer layer (epicuticle) of insects. The porous structure simultaneously absorbs fats and oils from the insect’s shell, leading to rapid desiccation, or drying out, which kills the insect.
There are two main types of DE based on the form of silica they contain. Filter-grade DE, used in industrial filtration, contains crystalline silica, which is hazardous if inhaled. Food-grade DE, intended for consumption, is composed mainly of amorphous silica and must contain less than 2% crystalline silica.
Directly Addressing Internal Fungal Pathogens
The mechanical action effective against pests in a dry environment is highly unlikely to translate into efficacy against fungi inside the body. DE’s fundamental mechanism relies on desiccation, a process negated in conditions of high humidity. The human gastrointestinal tract is a constantly moist, aqueous environment, which prevents the powder from effectively drying out microscopic organisms.
The target of the mechanical action is biologically distinct from the intended internal target. DE works on the lipid-rich exoskeleton of an insect, but fungi like Candida possess cell walls, which are structurally different. There is a lack of scientific evidence that ingested food-grade DE can mechanically puncture or cause desiccation in fungal cell walls within the digestive system.
Some studies exploring DE’s antifungal properties involve chemically modified compounds. For example, a composite made of DE framework conjugated with zinc oxide (DE-ZnO) showed enhanced antifungal activity in a laboratory setting. This effect was attributed to the chemical properties of the zinc oxide, not the mechanical action of the pure DE powder. Unmodified, ingestible DE lacks the necessary mechanism to serve as an effective anti-fungal treatment for systemic mold or fungal infections.
Physiological Effects of Ingesting Diatomaceous Earth
Ingesting food-grade Diatomaceous Earth is associated with effects on the digestive system and mineral status, separate from unproven antifungal claims. Food-grade DE is generally recognized as safe (GRAS) by the U.S. Food and Drug Administration for use in food, primarily as an anti-caking agent. When consumed, it passes through the digestive tract largely unchanged, acting as a form of non-digestible fiber.
This fibrous nature is linked to claims of “detoxification” or “cleansing.” The material’s porous structure is theorized to bind to heavy metals and other compounds, helping to eliminate them from the body, though rigorous human studies confirming this effect are limited. Its action as an intestinal scrubber may help promote more regular bowel movements and alleviate constipation.
Silica is a mineral involved in the formation of collagen and bone health. Only one small study has investigated DE ingestion in humans, suggesting a possible reduction in total cholesterol levels. However, most health claims, including benefits to hair, skin, and nails, remain theoretical and require substantial clinical research for validation.
Safety Considerations and Regulatory Stance
The most significant safety concern related to Diatomaceous Earth involves inhalation, particularly with the industrial-grade form. Inhaling crystalline silica dust can cause irritation and lead to serious lung conditions such as silicosis. Users of any DE product must take precautions to avoid breathing the fine powder.
Food-grade DE is considered safe for consumption, but it is not approved by any major regulatory body as a medical treatment for fungal or mold infections. Claims surrounding its use for systemic issues are based on anecdotal evidence and marketing, not on clinical trials. Relying on an unproven substance like DE for systemic fungal issues, such as Candida overgrowth, is not recommended. The appropriate course of action for internal pathogens is always to consult a qualified healthcare provider for a proper diagnosis and approved medical treatment plan.