"Hi there, just wondering if it would be safe to take 1 to 2 tablespoons a day, as an ongoing parasite preventative, and also for all the other health benefits. It seems by the research I have conducted, a lot of people are taking 1 to 2 tablespoons a day, is this a concern."
It is unwise to consume diatomaceous earth over a long-term period for several reasons. It contains aluminum, and it is dehydrating. Furthermore, it has not been studied for extended use, so you would be making yourself into a guinea pig. Most of the claims for diatomaceous earth's health benefits come from people who are promoting supplementation with silica. We have an article about the fraud of silica supplementation, which you are welcome to read. We have also written about the appropriate use of diatomaceous earth for the elimination of parasites. We sell food-grade diatomaceous earth, which is procured from the four ultra-pure United States deposits.