What's the difference between medicinal yam and yam sold in vegetable market?

Of course, the price is different. The yam sold in the vegetable market has not been processed, but it is still skinned. The yam sold in pharmacies is called "hairy yam" after processing, scraping off rough skin and drying in the sun or sun. Then it is soaked soft and stuffy, rolled into a cylindrical shape, dried and polished, and becomes "light yam". Wet thoroughly, cut into thick slices, eat raw or fry. So did Job's tears. Rice shops are raw, and pharmacies are fried or processed in other ways.

Supplement: the effect is the same, because the processing process you bought back is actually similar to the processing process.