Beef can be put in the refrigerator, but not together, because the cooked yam is completely exposed to the air, and an enzyme contained in yam will react with oxygen in the air to form brown pigment and melanin, even if the cooked yam is put in the freezer, it will turn black or even deteriorate.

The advantage of yam is slimming. Yam contains less calories, more nutrients and rich crude fiber, which is easy to increase people's satiety and control their desire to eat. Moreover, the fat content of yam is very low, with only 0.2g fat per100g yam, thus achieving the purpose of slimming.

Improve cold hands and feet: Chinese medicine believes that cold hands and feet are closely related to physical weakness, while yam black chicken soup and longan yam soup have good effects of tonifying the middle warmer, benefiting qi and nourishing blood, especially suitable for patients with cold hands and feet.