Perma-guard Fossil Shell Flour® Food Grade DE Diatomaceous Earth HUMAN HEALTH 1kg

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Perma-Guard Fossil Shell Flour is the world’s finest food-grade diatomaceous earth. Entirely organic and pure, this natural source of silica and assists with optimal gut health and nutrient absorption.




Fossil Shell Flour is a natural product derived from the fossilised remains of microscopic shells of freshwater aquatic organisms called diatoms. This 100% pure plant based whole food has many health benefits and provides a natural source of silica.





The benefits of Fossil Shell Flour (diatomaceous earth) can include:


  • Cleanses the digestive system and improves gut health
  • Helps remove toxins, impurities and parasites
  • Healthier looking skin, hair and nails.
  • Improves functionality of the liver and colon
  • Contains minerals including Calcium, Magnesium, Zinc, Iron and is 93% Silica
  • Increases nutrient and mineral absorption and hydration levels
  • Reduces gas and bloating
  • Helps improve energy levels
  • Promotes regular bowel movements
  • Cleanses intestinal walls and digestive tract  


Recommended usage


To experience these health benefits, simply take half to one teaspoon of food-grade diatomaceous earth with liquid (water, coffee, smoothie, etc) twice a day. You can increase your dosage slowly over several weeks up to a tablespoon.



Keep sealed and store in a dry, cool place

Avoid inhalation






What is Diatomaceous earth?


Diatomaceous earth is the fossilised remains of microscopic, aquatic organisms called diatoms. This major group of micro-organisms have been around for millions of years and can be found in oceans and waterways all around the world.


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 them less effective that their pure counterparts, this can also leave to a residue being left in the body.


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?


Diatomaceous earth has been mined for decades from various deposits all over the world, but not all diatomaceous earth is the same.


Plant Doctor sources diatomaceous earth from Perma-Guard, the original and largest supplier of registered food-grade diatomaceous earth products in the world. With more than 40 years’ experience, Perma-Guard in known world-wide for using an entirely pure grade of diatomaceous earth.


Out of 600 deposits in the US, only 4 are considered ‘food grade’ by the FDA standards, with Plant Doctor sourcing from one of these 4 deposits via Perma-Guard.


This freshwater deposit is consistent in its purity and has 89 – 92% amorphous silica content, making it very pure.


Plant Doctor is the exclusive Australian importer of Perma-Guard’s Fossil Shell Flour®.


What minerals are in it?


  • Amorphous Silica: 89 – 95%
  • Calcium: 0.407%
  • Iron: 0.25%
  • Potassium: 0.107%
  • Magnesium: 0.138%
  • Phosphorus: 0.00937
  • Silicon: 0.342
  • Zinc: 0.000754
  • Plus other Trace minerals


Is Fossil Shell Flour vegan?


Yes, Fossil Shell Flour is gluten-free, vegan, non-GMO, sugar-free and dairy-free.


Also approved by the FDA and EPA


Perma-Guard Fossil Shell Flour ® Food Grade pure Diatomaceous Earth - 100% Pure, organic and comes from fresh water.


Click the link to see what the manufacturers have to say about the product:


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 of Diatomaceous Earth starting to flood the market in Australia, we suggest you check that the product is registered/certified food grade before making any purchases as many types can contain impurities making them unsafe for consumption. To date, there is no Australian Diatomaceous Earth that is certified as Food Grade.


Some Diatomaceous Earth claimed as food grade contain higher amounts of sediment and clay that make them less effective. Depending upon how the deposits were formed, clay particles may be present in sufficient quantities to clog the pores of the fossilized shells. If this is the case, the effectiveness of the Diatomaceous Earth is severely reduced. The shape of the diatom must be tubular with holes in the walls. It must be fresh water because the diatoms form a harder shell and are less fragile than those in saltwater. Perma-Guard Fossil Shell Flour DE is registered Food Grade and is 100% pure, organic and contains no chemicals.

Out of 600 deposits in the USA, only 4 are considered "Food Grade" by the FDA standards.


Warning: When purchasing Food Grade Fossil Shell Flour Diatomaceous Earth, you should be looking for something that is off-white/bone in colour. The photo above is a comparison of the Perma-Guard brand on the left and an Australian version of fine grade Diatomaceous Earth on the right, as you can see there is a large comparison in colour, this is mainly due to clay deposits found in the Australian and other countries products.

Perma-Guard Food Grade Fossil Shell Flour (DE) - amorphous silica as diatoms (microfossils) is more than 99% and the crystalline silica is generally regarded as less than 0.5%.

PERMA-GUARD is the trade name for a grade and quality of Diatomaceous Earth (DE) and comes from the USA. Actually, DE is not an earth. It is the fossilized remains of microscopic shells of freshwater plankton Algae/plants called DIATOMS.

These products do not contain persistent chemicals harmful to the environment and to higher forms of life. Although not harmful to animals or the environment generally, it may be harmful to fish.


Perma-Guard is uniquely Natural, Organic and Sustainable.

All diatomaceous earth is not the same. Diatomaceous earth packaged under our Fossil Shell Flour (FSF) label comes from an extremely pure freshwater deposit of the diatom Melosira Preicelanica. Why is this diatom so special? Its shell is made of amorphous silica. Its shape and hardness are important to how it works. Its hardness keeps it from dissolving in liquid. The holes along the diatom's wall allow it to absorb moisture.


Why fresh water vs. saltwater DE? Fresh water deposits like ours have a consistent diatom presence. Their fossilized shells have maintained their tubular shape. This shape and strength of the fossil shell is critical to its effectiveness. Our deposit has very high amorphous silica content. Our deposit is more consistent in purity of other elements that have settled in it. Saltwater deposits contain a mix of types of diatoms of different shapes. Their fossilized shells are fragile and break easily. This renders them ineffective for our purposes. The saltwater deposits are less predictable in their sediments.


What's the difference between amorphous and crystalline silica? Amorphous silica is silica in its natural occurring state. It is a trace mineral every mammal on the planet needs to gain full health. It becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing means, e.g. the type of diatomaceous earth used in swimming pool, and other, filtration systems are crystalline silica. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable.


In Australia, Food Grade Fossil Shell Flour has only been approved for sale as an Anti-Caking Agent and animal feed, therefore we can only advertise it as such. Please see the manufacturers website to find out more or research on the internet (google, YouTube etc). In Australia it is currently not approved as a human health product, in other countries such as USA and Canada the Perma-Guard brand of Fossil Shell Flour Food Grade DE is approved by PMRA & Health Canada, USDA, FDA and EPA.


What our customers use FSF for:
Internal parasites, External parasites (i.e. dust mites, fleas, flies), increased silica (beneficial for hair, skin & nails), plaque reduction, arthritic & joint pain, Snail/slug/bug/insect prevention (not to be used on flowers or buds)


Check out these other resources relating to Diatomaceous Earth: - 40+ Amazing Diatomaceous Earth uses for health, home and garden. - some say this is the most important video you'll ever watch... - General D.E. Fact sheet from the US National Pesticide Information Centre - 9 ways to use DE.

Q. Does your Diatomaceous Earth kill Bed Bugs, fleas, weavils and other pest insects.


Food Grade DE

By: on 13 November 2018
Been using food grade DE for over 12 months now, and recently switched to this brand. It's definitely the best I've used and also comes at a great price. Highly recommend

Diatomaceous Earth- the wonder product!

By: on 23 October 2018
I have been buying this for a couple of years now to deal with lice in my poultry crop. Just sprinkle in bedding and corners of the coop and I have not had lice in all the time I have been using it. Prior to this I would use ivermectin (nasty poison) and still had lice! Cannot recommend it highly enough.Jude

Food Grade Diatomaceous Earth Powder

By: on 13 July 2017
After using a few different brands of food grade diatomaceous earth powder, I must say Plant Doctors Powder is the best quality one by far and the cheapest. I have always had prompt delivery of this product and have no hesitations to recommend to anyone wanting to purchase diatomaceous earth powder for human consumption, that they will go far to find a product to exceed quality and service.

Perma-guard - Fossil Shell Flour® Food Grade Diato

By: on 23 May 2017
This is the best DE in the world as far as I am concerned. I have used it for a number of years now both here in Australia and overseas. The number of uses for this product and the benefits are immense. I would not ever be without it. The service I have received from The Plant Doctor has been exceptional which is a major plus when buying online. Nothing has been too much trouble and the staff have gone out of their way to help when I have had queries. A1 plus. Thank you.

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