a tea spoon a day... in a large glass of water, morning or night but better on empty stomach, you tell him its powder for his digestion.
it has no taste.
and its not dangerous at all, it will so wonder.
whole family can take it.
this is ancient medicine, i am a healer in real life, its all from experience.
Can you provide some site from where you buy ?
amazon is good
https://www.amazon.in/s?k=diatomaceous+earth+food+grade&crid=CVDMRVN8QY2J&sprefix=diatomaceous+earth%2Caps%2C129&ref=nb_sb_ss_mvt-t11-ranker_2_18