I take a spoonful in my coffee every morning. My hair and nails grow like crazy (silica) and my skin is very healthy. Has supposed blood pressure and cholesterol benefits too, but I am normal there anyways. If you decide to use as a supplement, ]tart slow and don't take more than 1 tbsp a day - can constipate you fast.
I originally bought D-Earth for fungus fly treatment in my house plants (worked great) but read about the supplementing benefts and have really liked it. Best wishes!