比如，甲状腺功能衰减会影响新陈代谢，导致手脚冰凉；体内缺铁时，会影响血液携氧能力，导致手脚冰凉；压力过大时，体内激素和神经功能容易紊乱，导致手脚冰凉。

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...