Is Bentonite Clay Safe?

What is Bentonite Clay?

Bentonite clay is a type of absorbent clay that is made up mostly of montmorillonite. It is formed from volcanic ash and has been used medicinally for centuries. The earliest recorded use of bentonite clay was in ancient Mesopotamia, where it was used to line canals and form pharmaceuticals for internal use (Wikipedia, 2023).

Bentonite clay gets its name from Fort Benton, Wyoming, where large deposits of the clay were found in the 1880s. However, the clay can be found around the world and goes by many different names, including montmorillonite and smectite clay (WebMD, 2022).

Today, bentonite clay is commonly used for cosmetic purposes, such as face masks and skin treatments. It is also used industrially, in products like cat litter and drilling fluids. Medicinally, bentonite clay is taken internally or applied topically for conditions like constipation, diarrhea, and skin irritations. Some studies have shown benefits for acne, oily skin, and other dermatological issues when applied topically (WebMD, 2022).

How Bentonite Clay Works

Bentonite clay works primarily through adsorption. This means it has a strong negative charge that bonds to positively charged particles. The clay contains many tiny platelets, each with a negative electrical charge on their flat surfaces.

When mixed with water, these platelets separate from each other like cards and spread out over a large surface area. The negatively charged surfaces attract positive molecules like a magnet. Bentonite clay can adsorb toxins, heavy metals, impurities, and other internal contaminants. The toxins adhere onto the surface of the clay platelets through electrical attraction and are bound together.

According to studies like this one from the National Center for Biotechnology Information, the adsorptive properties of bentonite clay give it strong detoxifying actions. The expansive surface area allows bentonite to absorb many times its weight in toxins. This helps remove toxins and other harmful substances from the gut and skin.

Potential Benefits of Bentonite Clay

Bentonite clay has been used for centuries for its potential health benefits. Three main potential benefits of bentonite clay include:

Improved Skin Health

Bentonite clay may help improve skin health in several ways. Applying a bentonite clay mask can help absorb impurities from skin and tighten pores due to its absorbent properties (source). The minerals in bentonite clay, like calcium and magnesium, may also nourish skin. Some research suggests bentonite clay can help treat mild acne when used topically (source).

Detoxification

Some proponents claim bentonite clay can detoxify the body by binding to heavy metals and toxins in the digestive system. However, there is limited scientific evidence to support this. Anecdotal evidence suggests ingesting bentonite clay may help relieve symptoms like nausea and diarrhea. But more studies are needed on its efficacy and safety for detoxification (source).

Digestive Aid

Bentonite clay’s absorbent properties may make it effective at treating diarrhea, constipation, and other digestive issues. It is thought to absorb bacteria and toxins, and help bulk up stool. But again, more research is needed to confirm these potential benefits for digestion and gut health (source).

Safety Concerns and Side Effects

While bentonite clay has potential benefits, there are also some safety concerns and potential side effects to be aware of:

Contamination

Some bentonite clay products may be contaminated with heavy metals, pesticides, or other impurities, especially clays mined from the ground rather than created in a controlled laboratory environment. These contaminants could potentially be absorbed through the skin or ingested (for internal use). It’s important to choose a reputable brand that provides lab testing for purity and safety (1).

Lead Content

Studies have found that some bentonite clay contains concerning levels of lead. Lead is a toxic heavy metal that can cause health problems even in small amounts. Young children are especially vulnerable to lead exposure, so pregnant women and parents should take caution with bentonite clay (2).

Digestive Issues

Consuming bentonite clay could potentially cause constipation, intestinal blockage, and nutrient deficiencies if too much is ingested. It’s important to follow package directions and speak to a doctor before consuming bentonite clay internally (3).

Skin Irritation

Some people may experience skin irritation, rashes, or acne breakouts when using bentonite clay masks or other topical applications. Doing a patch test before wider use is recommended.

Lead in Bentonite Clay

Some bentonite clay deposits naturally contain trace amounts of heavy metals like lead due to the geological conditions in which the clay formed. While lead is toxic to humans, the FDA allows up to 10ppm of lead in color cosmetics containing clay and 6 ppm in cosmetic lip products.

Independent lab testing shows that lead levels in most commercial bentonite clay products fall well below these limits. For example, one study tested several popular bentonite clay brands and found average lead levels between 2-8ppm (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7073401/). These low levels are comparable to or even less than the lead naturally found in common foods.

However, some caution should be taken by pregnant women and young children, as even small doses of lead can impact development. Look for clays sourced far away from lead deposits and independently tested for purity. As with any supplement, consult your doctor before use if concerned about lead exposure.

Overall, lead in bentonite clay products is well within safe limits for cosmetic use when sourced responsibly. Independent lab results for lead content should be available from reputable supplements brands.

How to Choose Safe Bentonite Clay

When selecting bentonite clay, it’s important to choose a reputable brand that lab tests for contaminants. Here are some tips:

Look for brands that clearly state their clay is “food-grade” or “cosmetic-grade”. Food-grade bentonite clay has been processed to remove impurities and ensure it is safe for internal use. Cosmetic-grade clay is safe for external use on skin and hair. Some reputable food-grade brands include Aztec Secret, NOW Foods, and TerraSoul.

Reputable brands should provide lab test results showing their clay is free from heavy metals like lead and other contaminants. Bentonite clay naturally contains trace amounts of metals, so it’s important to verify lab testing. The Environmental Protection Agency sets strict standards for lead levels in cosmetics – under 10 parts per million is considered safe.

Always check where the bentonite clay is sourced from. Some brands source their clay domestically in the US from approved sites. This helps ensure quality control. Be wary of brands that don’t disclose their clay source.

When in doubt, consult with your healthcare provider, especially if planning to ingest bentonite clay internally. They can help assess if a brand is truly safe and contaminant-free.

With a quality food-grade bentonite clay from a reputable supplier that lab tests for purity, you can feel confident you are choosing a safe product.

Source: https://www.organicauthority.com/energetic-health/bentonite-clay-consumer-guide

Safe Use of Bentonite Clay

When using bentonite clay, it’s important to follow proper safety precautions to avoid contamination and maximize the benefits. Here are some tips for safe use:

Proper storage – Store bentonite clay in an airtight, glass container away from direct sunlight and moisture. Exposure to air and moisture can cause bentonite clay to grow mold. Storing it correctly preserves freshness.

Avoid contaminating clay – Use clean, dry utensils to scoop clay and avoid touching it with dirty hands. Contaminating the clay increases the risk of bacterial growth. Discard clay if any changes in smell, consistency or color occur.

Hydration and preparation – According to WebMD, mix bentonite clay powder with just enough water to achieve a thick, spreadable consistency. Letting it sit for 5-10 minutes allows better hydration. Always use clean hands and tools when mixing.

By following these basic precautions, bentonite clay can be used safely to achieve maximum benefits for skin and health.

Who Should Avoid Bentonite Clay

While bentonite clay is generally considered safe for most healthy adults when used externally, there are certain groups who should avoid using it without consulting a doctor first.

Pregnant Women

Pregnant women are often advised to avoid bentonite clay. There is some concern that consuming bentonite clay could lead to nutritional deficiencies by binding to nutrients from food. Since proper nutrition is vital for fetal development, most experts recommend pregnant women avoid ingesting bentonite clay.

Children

Children should not ingest bentonite clay or use it internally. A child’s digestive system is still developing, so bentonite clay could lead to intestinal blockages or nutritional deficiencies. Topical bentonite clay face masks may be safe for some older children, but check with a pediatrician first.

People with Medical Conditions

Those with a history of bowel obstructions or other gastrointestinal issues should avoid bentonite clay ingestion, as it could exacerbate these conditions. People with autoimmune diseases, low blood pressure, or chronically low iron may also want to avoid internal use until discussing with a doctor. Always check with a healthcare provider before using bentonite clay if you have any medical conditions.

Expert Opinions on Bentonite Clay Safety

Medical and natural health experts generally consider bentonite clay safe when used appropriately, but some caution is warranted.

According to Dr. Josh Axe, a certified doctor of natural medicine, “Bentonite clay definitely has some health benefits when used properly, but improper use can also cause side effects. It’s best used in moderation and avoided in certain situations.” He notes bentonite clay is likely safe for most people when used externally on the skin or taken internally for short periods, but too much could lead to constipation or mineral deficiencies (source).

Researchers note in the Journal of Pharmacognosy and Phytochemistry that bentonite clay demonstrates antibacterial activity and can help improve skin conditions, but should be used carefully. They advise caution for those with sensitive skin or allergies, as well as pregnant women (source).

According to naturopathic doctor Lara Adler, people can benefit from using bentonite clay in small amounts for short periods of time, such as using it once per week. However, she recommends avoiding long-term or frequent use to prevent potential mineral imbalances or laxative dependence (source).

While most experts consider external use of bentonite clay safe for healthy individuals, they recommend caution and moderation when ingesting it internally over long periods. Those with sensitivities or health conditions should consult their doctor before use.

The Bottom Line on Bentonite Clay Safety

Bentonite clay has several potential health benefits but also some safety concerns to be aware of. When used occasionally in small amounts, bentonite clay is likely safe for most people. However, excessive or long-term use could pose risks, especially for those with certain pre-existing conditions.

On the positive side, preliminary studies show bentonite clay may help treat oily skin, acne, and other skin conditions. It may also help remove toxins and provide minerals. However, larger human studies are still needed.

On the negative side, bentonite clay contains trace amounts of heavy metals like lead and aluminum. For most people, this likely isn’t a concern with occasional use. But regular or excessive use, especially during pregnancy, could contribute to heavy metal buildup in the body.

Those with conditions like kidney disease, iron deficiency, or vitamin deficiencies may also want to avoid bentonite clay or exercise caution. Always drink plenty of water and don’t exceed recommended dosages.

In moderation, bentonite clay is likely safe for healthy adults. But more research is still needed on its long-term safety. Those with health conditions or pregnant women should consult a doctor before trying it.