1, nutritional value is different

From the perspective of nutritional value, many people feel that the more expensive iron stick yam nutrition is better. But in fact, every 100 grams of ordinary yam, contains 5.8 grams of protein, 18.4 grams of starch, 125 milligrams of potassium, polysaccharide 8.86 grams. In contrast, 100 grams of iron stick yam contains 4.2 grams of protein, 15.2 grams of starch, 142 milligrams of potassium and 9.26 grams of polysaccharides.

So the two can be said to have their own merits, with ordinary yam containing slightly more protein and starch, and iron stick yam containing slightly more potassium and polysaccharides. But by and large, the nutrition of the two is more or less the same. The reason why the yam is so expensive, or because of the "rare is expensive" reason.

2, taste different

Taste, because the common yam has a high water content, crisp almost can pinch out the water. So it is generally used for stir-fry, such as the common "yam fried fungus" and "lotus pond moonlight", but also can be used as raw materials for porridge and stew, the flavor is very good.

The yam is sweeter, so it's best eaten steamed. It can also be steamed and pressed into puree to make some low-fat healthy desserts. All in all, if you want to steam yam to eat, buy iron stick yam, and for other cooking options, you can choose regular yam.

3, the price is different

The market of yam is generally divided into two kinds, one is a little thicker common yam, the price is cheaper, in fact, called Huai yam. The other is a slender type, the price will be more expensive, called the iron stick yam.