1. Smell it. Are there any other smells? If there is anything other than the smell of butter, it is that the butter is broken.

2, look at the shape, there is no water and oil, if there is, the butter will be broken, do not eat.

3, taste the taste, rinse your mouth and put a little on the tip of your tongue. Normal butter tastes dull, and if it has other flavors, it will go bad.

In terms of diet, butter is suitable for all ages, each time 10 ~ 15g. Butter is usually suitable as an auxiliary material for cooking food. However, when eating butter, it should be noted that pregnant women, obese people and diabetics should not eat it, and men should not eat more, because excessive intake may lead to prostatic hypertrophy.