Diatomaceous earth reacts with cement in mortar, changing its chemistry—directly contradicting the 'never alters' claim. Pet feed? That part is supported. https://s.fitbodyscience.com/23G79Y
Contradicted by evidence
Strong evidence contradicts these claims.
Diatomaceous earth's many uses: some evidence, but the 'no chemical change' claim doesn't hold for mortar.
We found some support for pet feed safety, but the big problem is the chemical composition claim. Other research shows that when diatomaceous earth is mixed into mortar, it reacts with the cement and changes chemically. That directly contradicts the post's claim that it stays the same. For the other uses—food supplement, slug repellent, fertilizer, and mortar adhesive—we didn't find studies in our databases, so we can't say much about them.
So while diatomaceous earth might be safe for pets, the idea that it never changes chemically doesn't hold up, at least when it's used in mortar.
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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.