I came across this "food grade" diatomaceous earth (for killing insects), and found that people eat it. This website says,
Food grade diatomaceous earth (DE) is a gentle abrasive that's also highly absorbent. DE is almost entirely made of silica, an important component of human ligaments, cartilage, and musculature. This unique resume makes DE one of the cheapest and most versatile health products on the market.
DE works as an amazing supplement; there are a couple of main reasons for this: 1) DE helps move things out of your intestines and 2) helps promote healthier hair, skin, bones, and joints.
then further talks about how it promotes "regular bowel movements and detox your digestive system", and increase "collagen production".
Another website also has similar claims.
This all sounds bogus to me. Is there any truth in the claims?
(A quick search only found various health hazards for workers in DE industry.)