You can try the feel

Packed milk powder, hold the bag with your hands and rub it back and forth. Good milk powder will make a squeaking sound. Inferior milk powder has coarser particles and makes a rustling sound due to the addition of glucose.

You can look at the color

High-quality milk powder is naturally milky yellow, while inferior milk powder may have crystals and luster or a bleached color if you look closely.

You can smell it

High-quality milk powder has a frankincense and natural fragrance. Inferior-quality milk powder has no frankincense or has a strong frankincense, usually because of the addition of cream.

You can taste it

Take a little milk powder and put it into your mouth to taste. High-quality milk powder is delicate and sticky, easy to stick to teeth and tongue, and has no sweetness from sugar. Inferior milk powder dissolves quickly in the mouth, does not stick to teeth, and has a strong sweet taste.

You can check the dissolution speed

Put the milk powder into the water in the cup. The faster it dissolves, the greater the possibility of inferior milk powder. When washed with hot boiling water, good milk powder will form suspended matter and float up. It will stick to the spoon at the beginning of stirring, and it will hang on the wall after being left for a long time. Inferior milk powder dissolves quickly because it is likely to contain co-solvents.