Yam is usually inedible when germinated. After germination, the nutrients in yam may be decomposed, and the taste will be worse than that of ungerminated yam when eaten, and the nutritional value will be reduced.

The components of yam are polysaccharides, esters, protein, fatty acids, vitamins, amino acids and trace elements. Yam, also known as Dioscorea opposita, Dioscorea opposita, Dioscorea opposita, Dioscorea opposita, Dioscorea opposita and Dioscorea opposita, is a herbal medicine collected in Chinese materia medica. The medicinal source is the dried rhizome of Dioscorea opposita, which is a dual-purpose Chinese herbal medicine for medicine and food. Due to the influence of regional climate characteristics, geological characteristics, growth habits and other factors, it has different origin characteristics.

Matters needing attention in yam selection

1, size: there are more yam meats with big heads and less yam meats with small heads.

2, cuts: it is necessary to pay attention to the cuts at both ends of the yam. If it exists for a long time, it means that it is not fresh.

3, epidermis: touch the skin of yam with your hand, if it is dry, it is not fresh.

4, meat quality: fresh yam meat is white, if it is not white, a little yellow, it is put for a long time.

Reference to the above content? Baidu encyclopedia-yam