糖尿病人到後期全身器官都被累計，吸收不好，營養不良，所以瘦。並發症是細胞長期泡糖水受傷了。

Generally, the injurious effects of hyperglycemia are separated into macrovascular complications (coronary artery disease, peripheral arterial disease, and stroke) and microvascular complications (diabetic nephropathy, neuropathy, and retinopathy).