It is difficult to control the hygienic conditions of homemade products. Generally speaking, the ones made by oneself are more hygienic than those bought from outside, but yogurt is an exception because it needs to go through the fermentation process and the growth of fungi cannot be good. Controlled consumption can hamper health.
So it is better to buy products from large manufacturers such as Guangming and Yili. You can also choose some local brands, such as Shuangfeng in Hangzhou, which are also good choices to ensure freshness
I suggest you buy a soymilk machine. You can make fresh soymilk, which is delicious and nutritious. Haha, I’m going too far