The use of wheat-bran in cereals, in bread, and even in vegetables is a

preventive of constipation, as is also the use of agar-agar, a Japanese
seaweed product
The use of wheat-bran in cereals, in bread, and even in vegetables is a
preventive of constipation, as is also the use of agar-agar, a Japanese
seaweed product. This is not digested and absorbed, but acts as a
water-carrier and a sweep to the intestinal tract. It should be taken
without admixture with laxative drugs.