A new snack served on the streets of Chengdu, in China, has been getting a lot of attention because of its unusual appearance; it looks like a lump of black human hair.

Fa Cai or Fat Choy is a type of dried cynobacterium that has long been a part of Chinese cuisine. It grows mostly in dry and barren desert areas such as Gansu, Shaanxi, Qinghai, Xinjiang, and Inner Mongolia in China, and is processed by air-drying immediately after harvesting. Because of its dark, filiform shape, it is commonly known as the “hair vegetable”. Fa Cay – scientific name Nostoc flagelliforme – is most often served as black vermicelli in a variety of broths and soups, and served on New Year’s Eve for good luck, because its Cantonese name sounds very similar to the phrase “struck it rich”. However, the dark treat recently went viral as a new street snack that makes it seem like you’re eating human hair.