1, containing a lot of mucin.

Yam contains a lot of mucin, which is a mixture of polysaccharide and protein, which is beneficial to human health care, can effectively prevent fat deposition in cardiovascular system, maintain the elasticity of blood vessels and prevent blood vessel blockage; Mucin can effectively reduce the accumulation of subcutaneous fat;

Effectively prevent connective tissue atrophy and collagen diseases, such as rheumatoid arthritis and scleroderma.

2, containing polysaccharides

Yam contains polysaccharide, which can help diabetic patients to stabilize blood sugar. Proper use of yam can reduce blood sugar level.

Yam should not be eaten in excess for the following reasons:

1, yam contains a lot of starch, which is easy to cause dry stool, so people who have constipation symptoms recently should eat less.

2, yam nourishing, although flat but still hot, excessive consumption is easy to get angry, so people who are easy to get angry should eat less.

3, people with gastrointestinal discomfort and indigestion should not eat for a long time.

Pay attention to the following points when choosing yam:

1, don't pick yam with big black spots on its surface.

2. After cutting, the meat is not white, but red and inedible.

3. Pay attention to distinguish whether it is "poisonous yam"

Cassava: the surface is rough, the meat is pink and white, and the wood is hollow.

Huangshan medicine: the rhizome is horizontal, the epidermis is smooth, and the meat quality of fresh Huangshan medicine is yellowish brown or lavender.

Dioscorea zingiberensis: the epidermis is yellow-brown, and the section of Dioscorea zingiberensis is yellow. If eaten in large quantities for a long time, it will damage liver and kidney function.

Many people know that cutting yam can't directly touch yam. Light can cause skin itching, and severe can cause a series of skin diseases. But cutting yam is the first step to eat, so how to avoid the problem that touching yam will cause itchy skin?

Yam can be soaked in white sugar, salt and white vinegar, which can avoid the problem of itchy skin in contact with yam. Another more direct method is to put on gloves to handle yam.

Eating yam in moderation can nourish the spleen and stomach, lower blood sugar and prevent cardiovascular diseases. A large amount of polysaccharide contained in yam can improve human immunity and is a rare tonic.