Aloe Vera leaf contains a chemical which eases the process of bowel release by increasing the water level in the stool .
The inner skin has a yellow, bitter liquid called aloin which can be dried to create laxatives. Aloe contains compounds called anthraquinones that provide a powerful relief for constipation.
Both are toxic if ingested in large quantities causing vomiting, nausea, cramping and diarrhea. Like many powerful medicinal herbs, the must be taken with caution.