Sweet potato powder smells like foot odor because sweet potato powder will deteriorate after being wet, which will produce a pungent taste.

Sweet potato contains a lot of starch. 100g sweet potato contains 44% starch. Grinding sweet potato into powder and adding pectin will form sweet potato powder. However, sweet potato powder will deteriorate after being wet, which will produce a pungent taste. This is why sweet potato powder has a sour taste. Don't eat it if you smell it.

Normal sweet potato powder has a faint fragrance, no sour taste and no sour taste. When buying sweet potato powder, pay attention to the shelf life of the product. If the shelf life expires, the odor produced by the moldy sweet potato starch can no longer be eaten. Sweet potato starch should be stored in a dry environment.