Charcoal has many uses in the home, as explained by the following quotes from Ellen White:

Charcoal for Bad Breath

That offensive breath must be purified. Get pulverized charcoal, soak it in water, and drink this water freely. Eat no vegetables. Eat fruit, and plain well-baked bread. Take light exercise, and at night wear a charcoal compress over the liver and abdomen (E. G. White Letter 115, 1898).

Charcoal Relieves Insect and Snake Bites

…take pulverized charcoal, wet it, and put in on as a poultice. The charcoal possesses a wonderful power of drawing poison from the system (E. G. White Letter 326, 1906).

I have ordered the same treatment for other who were suffering great pain, and it has brought relief, and been the means of saving life. My mother has told me that snake bites and the sting of reptiles and poisonous insects could be rendered harmless by the use of charcoal poultices (E.G. White Letter 90, 1908).

Charcoal Removes Inflammations and Poison

I have not time to relate the wonderful cures wrought, not by dosing with drugs, but by the application with water. We use charcoal largely, making it into poultices. It destroys inflammation, and removes the poison (E.G. White Letter 90, 1908).

Charcoal as a Healing Agent

...pulverized charcoal...use it freely. Mix it with sweet (cooking) oil. thus it can be taken with less difficulty than if mixed with water. I think that you would obtain benefit from the use of charcoal compresses, pulverized charcoal moistened, put in a flannel bag and placed over the affected part. When my husband was sick, I had recourse to many remedies, and I know the value of charcoal as a healing agency. I have worked for my husband with marked success when his life was in great peril (E. G. White Letter 75, 1904).