Psyllium seeds are soluble and insoluble sources of fiber from a plant (plantago ovata), not seaweed and to the best of my knowledge do not contain iodine. I could not find a nutritional analysis of psyllium husks.
Psyllium adds bulk to stool and helps hold more water in the stool to prevent hard, constipated stools. It is a grain primarily grown in India (85% of world production), the Mediterranean and North Africa. Psyllium is best known for its ability to maintain regular bowel movements. It also helps to lower cholesterol and aid the digestive process. A study conducted at the University of Minnesota on psyllium and the reduction of cholesterol. The psyllium(25 grams daily) caused a reduce heart disease and cholesterol levels, as much as 15%, in the men tested.
