Zheng He's voyages to the West ranged from one year to several years. He has lived at sea for a long time and lacks vegetables. However, the boatmen brought enough non-perishable soybeans and mung beans to eat bean sprouts all the way. No boatman suffers from beriberi and scurvy due to lack of vitamins. Because soybeans and mung beans contain a lot of vitamin B 1 and vitamin C.
During Zheng He's period, foreigners often went sailing, but because a large number of boatmen got beriberi and scurvy, they were forced to give up halfway because they didn't have bean sprouts. Bean sprouts were invented by China. Other kinds of vegetables and fruits can't be kept for a long time.
1July 9, 497 to1May 30, 498, the Portuguese navigator D 'Gama discovered the route that bypassed Africa and reached India. Of his 160 crew members, 100 died of scurvy. 15 19, an ocean-going fleet led by Portuguese navigator Magellan sailed from the east coast of South America to the Pacific Ocean. Three months later, some crew members had broken gums, some had nosebleeds and some were weak. When the ship arrived at its destination, only 35 of the original 200 people survived.
General Hernando Cortes conquered Mexico and occupied Baja, California in 1536. After California, most sailors returned to the division because of scurvy, so they did not continue to invade the California headquarters. 1577, a Spanish galleon drifted off the coast of the sargasso sea, and all the crew died of scurvy.
At the beginning of scurvy, the symptoms are weakness of limbs, mental decline, irritability, fatigue in doing any work, and redness and swelling of the skin. The patient felt muscle pain and depression. Then his face was swollen, his gums bled, his teeth fell out, and he had bad breath. Subcutaneous hemorrhage looks like a serious injury. Finally, he died of severe fatigue, diarrhea, dyspnea, fracture, lung or renal failure.