Flower cowpeas are good.

1. Cowpeas are rich in vitamin B, which can promote intestinal peristalsis, help digestion, treat constipation, and increase appetite. However, cowpeas contain very little vitamin B.

2. The vitamin C contained in cowpea can promote antibody synthesis and improve the body's immunity, while the vitamin C in cowpea is very small.

3. The phospholipids in cowpea can promote the secretion of insulin and participate in sugar metabolism. It is suitable for people with diabetes, but cowpea is not suitable for people with diabetes.