1. Introduction Type 1 diabetes is characterized by deficient insulin production mediated by immunity that could occur at any age. By 2017, 9 million people had been diagnosed with type 1 diabetes and most of them were in high-income countries [1]. The incidence of type 1 diabetes has increased by 3%–4% over the past three decades and is closely associated with environmental factors such as childhood obesity, vitamin D, n-3 polyunsaturated fatty acid, and dietary sugars [2].
