Longan meat is not fundamentally different from cinnamon, but when it is called cinnamon, it is generally a food; when it is used as an herbal medicine, it is called longan meat. Fresh cinnamon, as a fruit, is generally not contraindicated, but it should not be consumed by people who are allergic to cinnamon. Longan meat is often used as a traditional Chinese medicine, which is sweet in taste and warm in nature, and has the effects of tonifying the heart and spleen (tonifying the heart and spleen with nourishing drugs), nourishing the blood and calming the mind (stabilizing the mind and soothing the emotions by nourishing the blood), and can be used in the treatment of qi and blood deficiencies, palpitations (accelerated heartbeat often accompanied by heartburn), palpitation (a rapid heartbeat with panic), dysphagia (a violent heartbeat with panic), forgetfulness and insomnia, and blood deficiency withered yellow, among other conditions. It is not to be taken by those who have phlegm and fire inside and those who have stagnation of dampness and stagnation of drink (water stays in the body). When used as a fruit, it should be consumed in moderation, as excessive consumption may lead to gastrointestinal discomfort. When used as a traditional Chinese medicine, it should be used in accordance with the doctor’s instructions, and should be discontinued if there is any discomfort, and prompt medical attention should be sought.