Bentonite Clay

What It Is

Bentonite clay is a natural, fine-textured clay formed from aged volcanic ash. The name comes from Fort Benton, Wyoming, where one of the largest deposits was discovered. It’s primarily composed of montmorillonite, a type of smectite clay known for its strong ability to absorb and exchange ions.

In the health and beauty industries, bentonite clay is often marketed as “healing clay” due to its reported detoxifying and purifying properties. It’s used both internally (in supplements and detox drinks) and externally (in masks, baths, and poultices).

How It Works

Bentonite clay’s health effects stem from its high negative ionic charge and absorbent properties. Here’s how it functions:

Adsorption & Absorption:

• Bentonite clay particles attract and bind to positively charged substances — such as toxins, heavy metals, and impurities — through ionic exchange. This process is called adsorption. The clay also absorbs water and other molecules, swelling in size and trapping unwanted materials.

Detoxification:

• When used externally (in skin masks or baths), the clay may pull excess oil, bacteria, and impurities from pores. Internally, when ingested in small amounts (as in some detox products), it’s thought to bind toxins in the digestive tract and promote elimination through stool.

Alkalizing Effect:

• Some advocates claim it helps balance body pH because it contains minerals like calcium, magnesium, and iron, which may support an alkaline environment.

Digestive Health:

• Bentonite clay has been studied in animals and humans for relieving diarrhea and digestive upset by absorbing harmful bacteria and reducing intestinal irritation.

Why It’s Important

Bentonite clay has gained popularity for several potential health and skincare benefits:

• Skin Health: Used in masks and topical treatments to help unclog pores, absorb oil, soothe irritations (like eczema or dermatitis), and promote clearer skin.
• Digestive Support: May relieve mild digestive issues, reduce bloating, and support gut detoxification.
• Toxin Removal: Thought to help eliminate heavy metals, pesticides, and other harmful substances from the body, although clinical evidence is limited.
• Oral Health: Some natural toothpaste formulations include bentonite clay for its mild abrasiveness and detoxifying properties.
• Mineral Supplementation: Provides trace minerals that may support general wellness, though absorption rates are not well-established.

Considerations

While bentonite clay can be beneficial, caution and quality control are essential:

Purity Matters:

• Only food-grade bentonite clay should ever be ingested. Non-food-grade varieties may contain harmful contaminants, including lead, arsenic, or other heavy metals.

Heavy Metal Risks:

• Because it naturally absorbs metals, some samples can contain unsafe levels of lead. Always buy from reputable, tested sources.

Internal Use Caution:

• Excessive intake may cause constipation or blockages.
• It may interfere with nutrient absorption or medication efficacy if taken simultaneously.
• Pregnant or nursing individuals should avoid internal use unless approved by a healthcare provider.

Skin Sensitivity:

• Though generally safe, it may cause dryness or irritation in those with sensitive skin. Always patch-test before applying widely.

Scientific Evidence:

• While there’s promising anecdotal and early research support, comprehensive clinical studies on bentonite clay’s detoxifying effects in humans are still limited.