Found a usp grade calcium carbonate product on amazon. The seller says the product is checked for lead, and they can send CoA to people who are interested in. I haven’t asked them to send me a CoA yet, but I thought this is worth posting as there have been concerns regarding the heavy metal content of calcium carbonate supplements.
https://www.amazon.com/Carbonate-Earthborn-Elements-Pharmaceutical-Toothpaste/dp/B07GHS3SSW/
Calcium Carbonate Powder (1 Gallon (8 lb.)) by Earthborn Elements, Limestone Powder, Food & USP Pharmaceutical Grade, Toothpaste Additive, DIY Chalk Paint
by Earthborn Elements
Another one: https://www.amazon.com/Calcium-Carbonate-Powder-Non-GMO-Pharmaceutical/dp/B071HM8LPG
by Nutri Vista Pure Calcium Carbonate Powder- Non-GMO Pharmaceutical Grade
@Amazoniac @Dan Wich @ecstatichamster
https://www.amazon.com/Carbonate-Earthborn-Elements-Pharmaceutical-Toothpaste/dp/B07GHS3SSW/
Calcium Carbonate Powder (1 Gallon (8 lb.)) by Earthborn Elements, Limestone Powder, Food & USP Pharmaceutical Grade, Toothpaste Additive, DIY Chalk Paint
by Earthborn Elements
Another one: https://www.amazon.com/Calcium-Carbonate-Powder-Non-GMO-Pharmaceutical/dp/B071HM8LPG
by Nutri Vista Pure Calcium Carbonate Powder- Non-GMO Pharmaceutical Grade
@Amazoniac @Dan Wich @ecstatichamster
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