Bulk-forming agents are substances that help increase the bulk of stool in the digestive system. They work by absorbing water and swelling in the intestines, which makes the stool easier to pass. Common examples include psyllium, methylcellulose, and wheat bran. These agents are often used to treat constipation and promote regular bowel movements. These agents are typically available in powder, capsule, or tablet form and are considered safe for most people. It is important to drink plenty of water when using bulk-forming agents to prevent potential blockages in the digestive tract. Regular use can contribute to overall digestive health.