Cassia seed is the dried mature seed of Cassia or Cassia sibiricum, a plant of the Leguminosae family. Cassia seed is a medicinal material that can clear away heat and improve eyesight. It has the effects of relieving red and swollen eyes, improving blurred vision, and helping to relieve constipation. Modern research has found that Cassia seed can help lower blood pressure, regulate blood lipids, inhibit bacterial growth, and increase immune cell activity. The anthraquinone components it contains can stimulate the intestines to produce a laxative effect....