Everything You Need To Know About Diatomaceous Earth: Food-grade VS Non-Food-Grade

Everything You Need To Know About Diatomaceous Earth: Food-grade VS Non-Food-Grade

Cayla Mandean

Can we be real with each other? A natural, non-toxic product that does it all is sometimes harder to find than your favourite hair scrunchie. Don't get me wrong, there are plenty of amazing natural products that serve multiple functions, but something that truly tackles health, hair, skin, and home care all in one go. That's like finding a unicorn… rare, magical, and a little too good to be true.

Or is it?

If you are familiar with natural ingredients like Rhassoul clay, Green bentonite clay, Bentonite healing clay, Green kaolin clay, Red kaolin clay, White/plain kaolin clay and Pink kaolin clay then you already know the magic that our mineral-rich earth can bring to your beauty and wellness routine. But what if I told you there's another natural wonder that takes versatility to a whole new level?

What is Diatomaceous Earth?

Not to get too "sciency" but... Diatomaceous Earth is simply… a soft, silica-rich powder derived from fossilised remains of hard-shelled microalgae known as diatoms. These diatoms have accumulated over millions of years and their accumulated remains formed the sedimentary rock known as diatomite. Diatomite is ground into a fine powder to create Diatomaceous Earth (DE).

The primary component of DE is amorphous silica (SiO₂), which is essential for various bodily functions and is widely used for its abrasive, absorbent, and detoxifying properties. Unlike crystalline silica, which can be hazardous when inhaled, amorphous silica is considered safe for human use when handled properly. This fine, powdery substance is versatile and a solution to many common concerns, from supporting gut health to keeping our homes pest-free.

Food-Grade vs. Non-Food-Grade Diatomaceous Earth

What is Food-Grade Diatomaceous Earth?

Food-grade diatomaceous earth is a naturally occurring, non-toxic substance primarily composed of amorphous silica, typically containing around 85-90% silica, along with various trace minerals such as calcium, magnesium, potassium, and iron. It is considered safe for consumption by humans and animals when used appropriately. Below are some of its uses and health benefits:

Health Benefits of Food-Grade Diatomaceous Earth:

  1. Detoxification and Gut Health: Diatomaceous earth is believed to support the digestive system by binding to and helping eliminate toxins, heavy metals, and other harmful substances from the body. This process may promote a healthier gut microbiome, supporting digestion and regular bowel movements.
  2. Supports Healthy Skin, Hair, and Nails: DE contains high levels of silica, an essential component in collagen synthesis. Collagen is necessary for maintaining healthy skin, hair, and nails, and regular consumption of food-grade DE may therefore contribute to stronger nails, thicker hair, and improved skin appearance.
  3. Joint and Bone Health: Silica is integral to the formation of bones, cartilage, and connective tissues. By supporting the synthesis of collagen and glycosaminoglycans, DE can contribute to improved joint mobility and bone strength, which may be especially beneficial in osteoporosis treatment plans.
  4. Natural Internal Cleanser: The mild abrasive properties of DE are believed to assist in cleansing the colon, promoting the removal of waste and toxins. This, in turn, can lead to enhanced nutrient absorption and a general improvement in overall digestive health.

How to Use Food-Grade Diatomaceous Earth:

  • Toothpaste and Oral Care: DE's mild abrasiveness helps to clean teeth, remove plaque, and whitens without damaging enamel. Which is why it's a common ingredient in natural toothpaste formulations.
  • Skin Care: Due to its exfoliating properties, DE is used in DIY skin scrubs, exfoliators, and polishes. It helps to remove dead skin cells and promote a smoother and brighter complexion.
  • Pest Control: Food-grade DE is effective in controlling internal and external parasites, such as fleas on pets. It can also be used around the home to combat bed bugs, ants, and cockroaches.
  • Immune Support: Though limited, some studies suggest that silica may help boost immune function by supporting overall tissue health. DE is thought to contribute to the overall resilience of the body against illnesses.

To Consume:

  • Take one teaspoon of DE (food grade) with water or juice once a day. Preferably on an empty stomach an hour or two before or after eating.
  • DE is a very fine dry powder; so it's important to follow each dosage with plenty of liquids to maintain your body's hydration levels.
  • The dosage can be increased after a few weeks, to two doses, one teaspoon taken in the morning and one at night.
  • It's better not to use DE continuously for very long periods of time, but to rather give your body breaks. Based on anecdotal use, two weeks on, two weeks off, seems to work for a lot of people.
  • DE doesn't dissolve in water and it's normal to see some gritty residue, which is why some people prefer to mix into yogurts or smoothies.

What is Non-Food-Grade Diatomaceous Earth (DE)?

Non-food-grade diatomaceous earth is used primarily in industrial, agricultural, and pest control applications. This type of DE may contain higher levels of crystalline silica; which is not safe for humans or animals to ingest in large quantities. Therefore, it's always best to stick to certified food-grade versions if intended for consumption. But if you are just looking to use the DE in and around your home, or for any other external/topical uses, the non-food-grade version is perfectly suitable/safe and is also a bit more affordable.

How to Use Non-Food-Grade Diatomaceous Earth:

  1. Natural Pest Control: Non-food-grade DE is a natural, non-toxic pest control agent. Its sharp microscopic particles penetrate the exoskeletons of insects, dehydrating and killing them without using harmful chemicals. It is effective against pests like ants, fleas, cockroaches, and bedbugs.
  2. Household Deodoriser and Absorbent: Due to its high absorbent capacity, DE is commonly used to control odours in places like refrigerators, carpets, and litter boxes. It can also absorb moisture and spills, making it a nose-saviour in humid environments.
  3. Gardening and Agriculture: In gardens, DE is sprinkled around plants to protect them from pests without harming beneficial insects. It also improves soil quality by providing plants with essential silica, which supports healthy growth.
  4. Filtration and Industrial Uses: DE is extensively used in industrial filtration processes, such as in pool filters and water purification systems. It is also used as an anti-caking agent in food production and other applications requiring filtration.

How to Use Diatomaceous Earth in Natural Hair and Skincare Products

  1. Exfoliating Scrubs: DE's fine, abrasive texture makes it an effective natural exfoliant. It is commonly included in facial and body scrubs to remove dead skin cells and promote cell renewal, leading to a glowing complexion.
  2. Dry Shampoo: DE's absorbent properties make it an excellent ingredient in dry shampoos. It helps absorb excess oils from the scalp and refreshes hair without relying on synthetic chemicals or aerosols. (Keep reading for a lovely DIY shampoo bar recipe)
  3. Face Masks and Cleansers: When added to face masks, DE can help detoxify the skin, drawing out impurities and improving overall skin tone. It is particularly beneficial for those with acne-prone or oily skin.
  4. Deodorants and Foot Powders: DE is widely used in natural deodorants and foot powders due to its moisture-absorbing and odour-neutralising properties. It helps keep skin dry and fresh throughout the day.

How to Use Diatomaceous Earth (DE) Safely

While DE is generally safe, it is essential to use it responsibly:

  • Always choose food-grade DE for internal consumption.
  • Avoid inhaling DE powder, as its fine particles can irritate the lungs.
  • Store DE in a dry, sealed container to prevent moisture absorption.

You could also make our DE Shampoo bar. It is safely formulated to cleanse, nourish, and strengthen hair while being gentle on the scalp. This bar offers a balance of deep cleansing, scalp care, and hydration.

DE Shampoo Bar Recipe

Ingredients:

Phase A

50% SCI (a mild, sulphate-free surfactant that effectively cleanses the hair without over-drying. It creates a rich, creamy lather that removes dirt and oil while being gentle on the scalp)

10% Lauryl Betaine (a mild amphoteric surfactant that boosts foaming and helps maintain the balance between cleansing and conditioning, preventing excessive drying)

3% Cocamidopropyl Betaine (a sulphate-free surfactant that not only possesses excellent foaming and cleaning properties but is gentle)

9% Cetyl Alcohol (a fatty alcohol that softens hair, improves detangling, and acts as an emollient.)

7% Stearic Acid (helps thicken the formula, adds creaminess, and contributes to hair smoothness)

4% Shea Butter (rich in fatty acids and vitamins, deeply nourishes hair, reduces frizz, and protects against damage)

Phase B

5% Diatomaceous Earth (detoxifies the scalp, absorbs excess oil, and promotes a healthy hair environment)

3% D-panthenol (a deep-penetrating moisturiser that strengthens hair, improves elasticity, reduces static, dryness and breakage, and makes hair shinier, softer and more conditioned)

2.5% Batana Oil (repair damaged hair, boost shine, and promote hair growth by strengthening follicles)

1% Babassu Oil (hydrates hair without making it greasy, leaving it soft and shiny)

0.5% Hydra Hair (aids in moisture retention, leaving hair hydrated, soft, and more manageable)

0.5% Spearmint Essential Oil (has anti-inflammatory and cooling properties that help relieve dryness, dandruff, and scalp irritation)

0.5% Rosemary Essential Oil (stimulates hair growth and improves circulation.)

3% Marine Collagen (enhances hair structure, adds volume, and helps maintain strong, healthy strands.)

1% preservative

Lactic acid to reduce the pH if required

Equipment:

Beakers

Silicone spatula

Thermometer

pH strips or pH meter

Protective gear: mask, goggles and padded gloves

Microwave or double boiler. You need temperatures to get hot so a bain marie isn't the best choice here.

Mold of choice

Method:

  1. Wear protective gear, including a mask, to prevent inhaling SCI powder dust.
  2. Weigh and combine the Phase A ingredients in a beaker, stirring well to mix.
  3. Heat with caution by warming the mixture using either a microwave (in short bursts) or a double boiler. If using a microwave, heat for just a few seconds at a time and stir frequently to prevent bubbling over. The mixture will get very hot, so handle the beaker with padded gloves or a cloth. Continue heating and stirring until smooth and lump-free.
  4. Once fully melted, remove from heat and mix in the diatomaceous earth until a grainy paste forms.
  5. Stir in the batana oil, babassu oil, d-panthenol, spearmint and rosemary essential oils one at a time. As the mixture begins to cool, it will thicken—keep stirring to prevent it from solidifying too soon.
  6. When the mixture has cooled below 40°C, mix in the marine collagen and preservative.
  7. Since this is a solid product, create a lather with a small amount of water to test the pH using a meter or strips. The ideal range is 4.5 - 5.5. If the pH is too high (above 5.5), adjust gradually with drops of liquid acid (like lactic acid), stirring well and retesting after each addition.
  8. The final texture should resemble cookie dough. Press it firmly into a mold using a spatula.
  9. Place the mold in the fridge to set.
  10.  Once solidified, remove from the mold and let the bars sit for a few days to fully dry and harden. This extra drying time ensures a firmer, longer-lasting bar.

Note: if you live in a very humid area, you may need to slightly adjust the formula: reduce the panthenol and add extra hardening agents such as stearic acid/cetearyl alcohol.

To use rub the shampoo bar over your wet hair and massage to work up a lather. Rinse well. Follow up with a hair conditioner and mask for the healthiest hair.

Recommended Usage & Safety Considerations

While food-grade diatomaceous earth (DE) is recognised as safe for consumption when used appropriately, individual reactions may vary. Therefore, it’s suggested to consult with a trusted and registered healthcare professional before introducing DE or any new supplement into your diet, especially if you have underlying health conditions, are pregnant/nursing, or are taking prescription medications. 

Always follow product guidelines and conduct a patch test before using DE on the skin or hair to check for sensitivity. If irritation occurs, discontinue use immediately. 

Inhaling any fine dust (including food-grade DE) can irritate the lungs. Prolonged or excessive inhalation should be avoided.

For pest control or industrial applications, adhere to safety guidelines and consult relevant professionals where necessary.

References:

(PDF) Usage of human diatomaceous earth 

(PDF) Collagen and Aging: A Scientific Perspective

DIATOMACEOUS EARTH: Overview, Uses, Side Effects, Precautions, Interactions, Dosing and Reviews

The chemistry of silica and its potential health benefits - PubMed 

Cayla Mandean

With a passion for skincare, wellness, and storytelling, Cayla is here to cut through the clutter and empower you with clear, research-backed, actionable knowledge to elevate your beauty routine and well-being. If she’s not outside in nature, at the gym, reading or spending time with her loved ones, you will find her creating clear, impactful content that inspires and informs. Her goal? To make sure you feel confident in your choices and enjoy the journey to an empowered, happier you!