1, which is different from shape.
Ordinary yam, also known as vegetable yam, is characterized by its coarseness; Dioscorea opposita is generally a slightly long and round cylinder, thin on the top and thick on the bottom, much like a wooden stick. A single yarn also has a flat and wide shape.
2. Distinguish from the epidermis
The epidermis of common yam has no rust spots; The epidermis of Dioscorea opposita contains its unique dark red rust spots.
3. Distinguish from the texture.
Ordinary yam has a lot of water, which can be seen by pinching it with your hand and is easy to break; Dioscorea opposita is firm and delicate.
Step 4 distinguish by weight
Ordinary yam has a thin skin, feels greasy when brushed, and the cut surface is easy to oxidize, so the weight is relatively light. Yam has the characteristics of being heavy.
Chinese yam
It is a herbal medicine collected in Chinese Materia Medica, and its medicinal source is the dried rhizome of yam. Has the effects of invigorating spleen and stomach, nourishing kidney and essence, benefiting lung and relieving cough, and lowering blood sugar.
nutritive value
The meat of Dioscorea opposita is white and contains protein, vitamins, starch, calcium, phosphorus and other essential nutrients. Mucopolysaccharides in yam. Can stimulate and regulate human immune system, and has antiviral effect. Saponins in yam can regulate blood pressure and reduce blood sugar and blood lipid.