Bentonite Clay has a variety of health benefits if used correctly! Apparently you can take it internally if it’s food grade, for heavy metal detox!
https://draxe.com/nutrition/10-bentonite-clay-benefits-uses/

The Age-Old Practice that Supports Skin & Gut Health
This natural product is composed of ash taken from volcanoes. It's used to treat many different conditions affecting the skin to the digestive system.
Dr. Axe