Does Diatomaceous Earth work? flea and worms deworming

Diatomaceous earth
Great for getting rid of fleas and worms in dogs and cats and even people. Be careful not to breathe the powder in. I hold my breathe when applying and using it. You can also wear a mask or a shirt or bandanna or something. Often I will use it outside as well. Its also great for getting rid of ants in flower and vegetable pots too. See further linked videos and playlist for more details and examples of use.

Small Dogs and Puppies ½ tsp of food grade DE
Dogs (under 50 lbs) 1 tsp of food grade DE
Dogs (50-100 lbs) 1 tbsp of food grade DE
Dogs (over 100 lbs) 2 tbsp of food grade DE

Small Cats and Kittens (2-6 ½ lbs) ½ tsp of food grade DE
Full Grown Cats (7-13 lbs) 1 tsp of food grade DE
Large Cats (over 13 lbs) 1 ½ tsp of food grade DE