Sweet potato bud, also known as sweet potato leaf and sweet potato leaf, belongs to sweet potato genus of Convolvulaceae. They are varieties with tender stems at the top of sweet potato seedlings. In Hong Kong and around the world, they are still called "vegetable queens", "longevity vegetables" and "anti-cancer vegetables". The Asian Vegetable Research Center has listed sweet potato leaves as highly nutritious vegetables.

Sweet potato leaves are rich in nutrition. According to the test, sweet potato leaves contain 2.28g of protein, 0.2g of fat, 4. 1 g of sugar, 2.3mg of mineral potassium1.6mg of iron, 34mg of phosphorus, 6.42mg of carotene and 0.32mg of vitamin C. Compared with ordinary vegetables, the contents of minerals and vitamins are superior, and the content of carotene is higher.

Sweet potato leaves have health care functions such as improving immunity, stopping bleeding, lowering blood sugar, detoxicating, and preventing and treating night blindness. Regular consumption can prevent constipation, protect eyesight, keep skin delicate and delay aging. There is also a record in "Seeking the Source of Materia Medica", which holds that sweet potato: "Cooling blood and activating blood, relaxing the bowels, removing blood stasis and detoxifying." Especially suitable for people with chronic constipation. You can also eat 250g fresh sweet potato leaf oil and salt once on an empty stomach, once in the morning and once in the evening, which is suitable for people with dry stools. As the folk proverb says, "every meal has sweet potatoes, which can be swallowed." .