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  • PREMIUM Fossil Shell Flour®: Food Grade DE Diatomaceous Earth - Organic - 800g
PREMIUM Fossil Shell Flour®: Food Grade DE Diatomaceous Earth - Organic - 800g

PREMIUM Fossil Shell Flour®: Food Grade DE Diatomaceous Earth - Organic - 800g

Sourced from one of the most pure sites worldwide

Fossil Shell Flour (Food-Grade Diatomaceous Earth) is a natural, silica-rich powder made from fossilised diatoms. It supports gut health, mineral absorption and detox processes in animals and humans, and acts as a mechanical pest deterrent in gardens with
Organic Food-Grade DE People, Pets & Gardens Natural Silica Mineral Source
$29.95
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Description

Natural Detox Support from 100% food-grade, organic diatomaceous earth

Fossil Shell Flour is a 100% food-grade, organic diatomaceous earth (DE) made from the fossilised remains of freshwater diatoms. Naturally rich in over 86% amorphous silica, it provides a pure source of naturally occurring minerals suitable for human, animal, and gardening applications. Carefully processed for purity, it contains no fillers, additives, or synthetic ingredients. 

Why Choose Micronised Fossil Shell Flour:
  • 100% organic, food-grade diatomaceous earth
  • Naturally contains over 86% amorphous silica
  • Multi-purpose product suitable for people, animals, and gardens
  • Free from fillers, binders, chemicals, and artificial additives
  • Carefully sourced and processed for purity and consistency
  • Convenient way to incorporate a naturally occurring mineral source into everyday routines
Key Benefits of Fossil Shell Flour:
  • Supports Everyday Mineral Intake: Provides a natural source of amorphous silica and other naturally occurring trace minerals as part of a balanced lifestyle.
  • Digestive Wellness: Commonly included in digestive wellness routines and used by those looking to support overall gut health.
  • Skin, Hair & Nail Support: Silica is an important structural mineral involved in connective tissues and is commonly included in beauty-focused wellness routines.
  • Animal Health: Can be incorporated into animal feed in accordance with feeding guidelines and is commonly used as part of general livestock and pet management programs.
  • Garden & Soil Applications: Can also be used around the home and garden as part of integrated soil improvement and natural pest management practices.

...

Whether you're looking for a naturally occurring source of silica for everyday wellness, supporting animal management, or a versatile product for use around the home and garden, Plant Doctor Fossil Shell Flour delivers a high-purity, food-grade solution you can trust. Its naturally occurring mineral profile and versatile applications make it a valuable addition to a wide range of lifestyles.

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Features

Human Health Benefits Supports Digestive Health Helps cleanse the digestive system, removes toxins, parasites, and impurities.
  Improves Skin, Hair & Nails A natural beauty booster, promoting healthier-looking skin, hair, and nails.
  Enhances Nutrient Absorption Increases the body’s absorption of vital nutrients and minerals, including calcium and magnesium.
  Supports Liver & Colon Function Improves overall liver health, colon function, and bowel regularity.
  Detoxifies the Body Aids in removing harmful toxins, heavy metals, and pollutants from the body, supporting a healthy liver and kidneys.
  Promotes Energy & Vitality Increases energy levels and hydration, helping you feel more energetic and refreshed.
     
Animal Heatlh Benefits Parasite Control Assists in controlling internal and external parasites naturally. External application: Apply dry with sponge over the animals coat, wear a dust mask and do not inhale fine dust particles. Add to dust baths for fowl.
  Improves Joint & Bone Health Promotes stronger bones and joints, improving mobility and flexibility.
  Gut Health Support Aids digestion and helps improve overall gut health.
  Detoxifies Helps eliminate heavy metals and toxins from the body.
  Reduces Odor Controls odor and moisture in barns, stalls, and litter boxes.

Specifications

Technical Highlights
Ingredients

100% Organic Food-Grade Diatomaceous Earth

  • Derived from fossilised freshwater diatoms
  • Naturally contains >86% amorphous silica (SiO₂)
  • Naturally occurring trace minerals
Specifications No fillers, binders, preservatives, or artificial additives
Form Finely milled for consistent quality
Human use: Consume only as directed by a qualified healthcare professional
Animal use: Mix into feed at no more than 2% of the total feed ration and follow appropriate feeding guidelines

How it Works

Diatomaceous earth, also known as "dinosaur dust" or "fossil shell powder," is a unique product made up of silica from fossilized aquatic diatoms. It’s widely used for detoxification, parasite control, and as a natural pest deterrent in gardens. Diatomaceous earth helps strengthen bones, improve joint health, and supports detoxification through its ability to absorb harmful toxins.       

Research on the Benefits of Diatomaceous Earth
Detoxification Diatomaceous earth has been studied for its role in detoxifying the body. A 2011 study published in the American Journal of Clinical Nutrition highlighted that silica helps eliminate harmful substances, such as heavy metals, from the body. Diatomaceous earth helps with detoxification by carrying an electrical charge that attaches to free radicals and toxins, effectively neutralizing and removing them through sweat, urine, and faeces.
Parasite Control According to a 2011 study in the Oxford Journal of Poultry Science, diatomaceous earth demonstrated effectiveness in controlling internal parasites in animals. The research showed that hens given DE had fewer parasite infections and produced more eggs with larger yolks. This highlights the ability of DE to support digestive health and parasite control.
Improved Bone Health Research published in the Journal of Nutrition, Health, and Aging suggests that silica is crucial for healthy bones, tendons, and cartilage. Silica helps with calcium absorption and bone mineralisation, which contributes to stronger bones and reduces the effects of aging, such as joint pain and reduced cartilage.
Skin and Joint Health Diatomaceous earth’s high silica content is known for its benefits in improving skin elasticity, strengthening hair, and supporting joint health. Silica is an essential component of connective tissues, which helps maintain healthy skin, joints, and cartilage.

 

Read more on our blog

Application

Usage Instructions
Recommended Dose (For Humans)

Simply take 1/2 teaspoon of food-grade diatomaceous earth with filtered water daily. You can increase your dosage slowly over several weeks up to 1 teaspoon (maximum 3g) per day. 

*Consume with plenty of filtered water. To be taken only under the advice of a health care professional.

Recommended Dose (Small Pets & Livestock)

Mix with food. For small pets under 25kg, use 1/2 teaspoon per day. For larger pets, use up to 1 teaspoon per day. Livestock & animals over 150kg, add 1% of the weight to the feed rations.

*to be mixed into animal feed not exceeding 2% by weight of total ration    

External Parasite Control Make a paste with water or rub full-strength powder onto the skin and/or apply to the coat and sprinkle on bedding/stalls/pens. Birds will naturally use to dust bathe.
Garden Pest Use Sprinkle on leaves, trunks, branches & soil to deter pests. Reapply after rain/watering. Avoid ALL flowers. This product is indiscriminate and works to make small abrasive cuts to the exoskeletons on contact for both hard & soft-bodied insects causing fatal dehydration. Use only where plants are being eaten by pest species and avoid all flowers to protect pollinators. Can be used on bee hives on the base only for hive beetle. Ensure a thin covering does not allow the bees to come into contact as they enter/exit the hive.

 

Safety

FAQ

Question Answer
What is Diatomaceous Earth? Diatomaceous earth is the fossilized remains of microscopic aquatic algae called diatoms. This major group of microorganisms has existed for millions of years and can be found in oceans and waterways worldwide.
What’s the difference between Fossil Shell Flour and Diatomaceous Earth? While these two are basically the same thing, Diatomaceous earth packaged under the Fossil Shell Flour label ensures you will be receiving the purest form of DE sourced from a freshwater deposit. Fossil Shell Flour is the registered trademark of Perma-Guard, the original and largest supplier of fresh water, food-grade Diatomaceous earth.
Is all Diatomaceous Earth the same? No, there are many different varieties of Diatomaceous Earth, and not all of them are food-grade. Some Diatomaceous Earth cited as food-grade contains higher amounts of sediment and clay, making it less effective than its pure counterparts. Since the Australian market has been flooded with cheap versions of DE, we suggest you check that the product is registered and certified food-grade prior to purchase.
Where does your Diatomaceous Earth come from? Plant Doctor sources Diatomaceous Earth from Perma-Guard, the original and largest supplier of registered food-grade Diatomaceous Earth products in the world. Out of 600 deposits in the US, only 4 are considered ‘food-grade’ by FDA standards. This freshwater deposit is consistent in its purity and has an 86–92% amorphous silica content, making it very pure. Plant Doctor is the exclusive Australian importer of Perma-Guard’s Fossil Shell Flour®.
Is Fossil Shell Flour vegan? Yes, Fossil Shell Flour is gluten-free, vegan, non-GMO, sugar-free, and dairy-free. It is also approved by the FDA and EPA for limited uses in the USA.
Tell me more about the manufacturer. Perma-Guard Fossil Shell Flour® Food Grade pure Diatomaceous Earth is 100% pure, organic, and comes from freshwater. Perma-Guard is the original and largest supplier of registered food-grade Diatomaceous Earth products in the world and is imported from the United States. Not all Diatomaceous Earth is food-grade. There are many cheaper versions starting to flood the market in Australia, so we suggest you check that the product is registered/certified food-grade before purchasing.
Why freshwater vs. saltwater DE? Freshwater deposits have a consistent diatom presence. Their fossilized shells maintain their tubular shape, critical to effectiveness. Our deposit has very high amorphous silica content, while saltwater deposits contain a mix of diatoms of different shapes, making them less effective. The sediments in saltwater deposits are less predictable.
What’s the difference between amorphous and crystalline silica? Amorphous silica is silica in its naturally occurring state and is a trace mineral necessary for full health. Crystalline silica, formed through exposure to extreme heat, is extremely dangerous when inhaled or ingested and is not biodegradable. Crystalline silica is often used in filtration systems and is not safe for consumption.
Disclaimer In Australia, food-grade Fossil Shell Flour is only approved for sale as an anti-caking agent and animal feed. It is not currently approved as a human health product in Australia. For more information, visit the manufacturer’s website at www.perma-guard.com.

Reviews

Amount of Reviews:

great product

By: Kien Sen on 5 January 2025
very happy with this product after a few months use. will get it again when its finished

A+

By: Tom on 8 May 2026
easy to feed to my chickens + dogs and me too, also great for killing pests like fleas + silverfish

Organic Diatomaceous Earth Powder (Food Grade Foss

By: Colin on 11 May 2026
I’m really impressed with Plant Doctor's PREMIUM Fossil Shell Flour. The powder is finely milled, so smooth it mixes easily into water, smoothies or morning coffee without any grittiness. It’s simple to use, and appreciate that it has no taste or smell. The 800g bag is great value and will last a long time when using a teaspoon daily. Have observed improvements in my digestion and energy levels, and general skin feel too. Delivery was super quick, and the packaging is resealable and well-labeled. The quality is outstanding, and I know exactly where I’ll be getting my next supply, definitely sticking with Plant Doctor. Many thanks to the team!

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Customer Reviews

First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.

Billy Green

Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.

Michael Preddy

Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!

Tim McAuliffe

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