When it comes to herbs for digestion, psyllium is definitely among the best. Psyllium husk contains soluble fiber that may benefit your digestion and heart health. It may also help lower your risk of developing certain health conditions. It can be used to ease constipation, or it can be added to your diet to help promote regularity and overall digestive health. In Ayurveda, psyllium is used to cleanse and detox the large intestines.