The product presents a very low health risk. Magnesium hydroxide is a general purpose food additive.
Dust generated from the dried product is classified as a nuisance dust.
Ingestion is unlikely. If ingested in sufficient quantity, may cause gastrointestinal disturbances. Symptoms may include irritation, nausea, vomiting, abdominal pain and diarrhea. May aggravate pre-existing respiratory conditions. May irritate or injure eyes.