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Diatomaceous Earth: Food Grade vs. Feed Grade

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4 responses

  1. Mary Beth

    What is the difference in food grade & feed grade or are they the same product with different labeling?

    October 27, 2012 at 12:04 pm

    • Hi Mary Beth,

      Thanks for the questions.

      Food and feed grade diatomaceous earth (DE) products have different specifications that they must meet.

      In order to be considered feed grade the DE must contain less than 1% crystalline silica and not be calcined (heated to a temperature above 1000ÂșC).

      In order to be food grade a DE product must contains less than 1% crystalline silica, not be calcined and have very low levels of heavy metals (less than 10 mg/kg of lead and arsenic).

      Red Lake Diatomaceous Earth is both food and feed grade and meets all of the specifications above.

      October 29, 2012 at 10:21 am

  2. Debbie Slayton

    The last time I purchased DE it was in the consistency of flour. This time it is more like a reddish brown color. It says it is food chemical codex grade. Is that the same thing as far as safety on animals? I just need to know if I should take it back to swap.

    October 19, 2012 at 2:31 pm

    • Hi Debbie,

      Thanks for the question!

      Each deposit of DE is a little bit different in what it contains naturally. Red Lake Diatomaceous Earth contains calcium montmorillonite (also known as calcium bentonite), a clay that occurs naturally in our deposit of diatomaceous earth. Lighter DE products, on the other hand, contain only diatomaceous earth. It is the calcium montmorillonite that causes the DE to be brownish-grey in color. Red Lake Diatomaceous Earth is food grade (also referred to as Food Chemical Codex Grade) and is registered for use in animal feed (as an anti-caking agent and flow aid).

      October 22, 2012 at 8:40 am

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