Guidin is the young fruit and fruit stalk of cinnamon, usable as both medicine and spice

Guidin is one of the products obtained during the harvesting and processing of cinnamon, the evergreen tree of the Lauraceae family. It generally refers to the young fruit of cinnamon or the portion including the fruit stalk, and in some production areas it is also referred to interchangeably with cassia bud. Cinnamon can be said to be a treasure in every part: the bark is what is commonly called cassia bark, the tender twigs used as medicine are called cassia twig, the leaves can be steamed to produce cassia oil, and the young fruit and fruit stalk are used as guidin. Production areas are concentrated in the warm, humid regions of South China and Southwest China, and Taiwan also cultivates and uses related species such as native cinnamon.

In appearance, guidin is not large, mostly spherical or oval young fruits with fine, short fruit stalks, a brownish surface, and a distinct aroma. It comes from the same tree as cassia bark and is rich in volatile oil, with the main aromatic component being cinnamaldehyde, so its scent is pungent and spicy with a hint of sweetness, in a mild and lasting style.

In terms of uses, guidin is warm in nature and pungent-sweet in taste in traditional Chinese medicine, and often appears in formulas for warming the middle and dispelling cold, and for strengthening and stimulating the appetite. In folk kitchens, it is also commonly used in stewed meat, braised dishes, five-spice powder and other seasonings, where it can remove unpleasant odors, enhance flavor, and add pungency and aroma. In addition, guidin can also serve as one of the raw materials for extracting essential oil, used in related processing fields.

In cultivation, cinnamon prefers a warm, humid climate and fears frost, making it suitable for planting in tropical and subtropical low-altitude areas. It is mostly propagated by seed, and young plants need appropriate shading. Guidin is generally harvested at the young fruit stage, and after harvesting it can be sun-dried for storage. A common question is how it differs from cassia bark and cassia twig: all three come from the same tree; cassia bark is taken from the bark, cassia twig is the tender twig, and guidin comes from the young fruit and fruit stalk. Their aromas are similar, but their uses each have different emphases. When selecting, those that are dry and intact, strongly aromatic, and free of mold are best.