Final answer:
Ingesting activated charcoal can lead to digestive issues such as diarrhea, abdominal pain, vomiting, and nausea, as well as more severe health problems like intestinal obstruction, anemia, and allergic reactions.
Step-by-step explanation:
The adverse effects of ingesting activated charcoal include a range of digestive issues such as diarrhea, abdominal pain, and in more severe cases, vomiting and nausea. While activated charcoal is known for its adsorption properties, beneficial in certain medical treatments like carbon monoxide poisoning, it's also associated with risks like intestinal obstruction, anemia, and allergic reactions. Moreover, chronic ingestion has potential long-term health implications, including an increased risk of conditions like colon cancer and osteoporosis, as well as impacts on heart function and motor coordination.