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The history of yam can be traced back to the Xia Shang era more than 2,000 BC, and was first seen in the "Classic of Mountains and Seas · North Mountain", which was known as "potato potato" in ancient times. In the Book of Songs, there is also a vague depiction of yams. According to historical records, as early as the Shang Dynasty, yams had become a tribute to the court for nobles to enjoy. During the Han Dynasty, yam cultivation and consumption became more common, and its medicinal value was gradually recognized.
In the "Shennong's Materia Medica", yam is listed as the top grade, praising it for its miraculous effect of "replenishing the middle and invigorating qi, growing muscles, and serving the ears and eyes for a long time". Since then, many medical experts have conducted in-depth research and elaboration on the medicinal value of yam, from Sun Simiao's "Qianjin Fang" to Li Shizhen's "Compendium of Materia Medica", yam has always been regarded as a good product for nourishing the body and regulating qi and blood.
In China, yam is cultivated all over the country, and each region has its own characteristics. Henan Jiaozuo Huai Yam is a national geographical indication protected product, and its delicate and powdery taste makes people forget to return. As the first of the "Four Great Medicines", Huai Yam is evaluated by doctors as "warm supplement" and "flat sex", which is a model of "medicine and food homology". Shandong Heze Chenji yam is also a national geographical indication product, because of its surface growth similar to chicken skin follicles of rough spots, also known as "chicken skin rough yam", its taste is sweet, fragrant, cottony, refreshing, highly praised. In addition, Hebei Lixian Ma Yam, Hubei Lichuan Yam, Jiangxi Ruichang Yam, Shandong Xincheng Fine Hair Yam and so on also have their own merits and are deeply loved by people.
Yams can be eaten in a variety of ways, such as hot dishes, cold dishes, stewed dishes, hot porridge, and desserts, each of which can fully demonstrate its unique taste and nutritional value. Braised yam has a delicious taste and can supplement the nutrients needed by the human body; The shredded yam salad is relatively refreshing to eat, and it is suitable for summer heat; Stewed pork ribs with yam is a food tonic soup that can enhance the body's immunity; Yam porridge is a home-cooked delicacy that is both nutritious and easy to digest. Yam's "sworn enemy"! The doctor reminds: the two must not be eaten together, health problems, pay attention!
1: Pumpkin. Yam is a treasure trove of vitamin C, and pumpkin contains vitamin C-breaking enzymes. When yam and pumpkin are eaten at the same time, the vitamin C-decomposing enzyme in the pumpkin may break down and destroy the vitamin C in the yam, thereby reducing the nutritional value of the yam. Therefore, when consuming yams, one should avoid eating them at the same time as pumpkin.
2: Pork liver. Pork liver is rich in trace elements such as copper, iron, and zinc, and these metal ions will accelerate the oxidation process of vitamin C when they encounter vitamin C in yam, thereby destroying the nutrients of yam. In addition, the vitamin C in yam is necessary for maintaining the skin, promoting iron absorption, and improving immunity, so consuming it with pork liver may reduce its nutritional value.
3: Seafood. Seafood such as fish and shrimp are rich in protein, while yam contains tannic acid. When yam and seafood are eaten at the same time, they may synthesize tannic acid protein, which weakens the peristalsis of the gastrointestinal tract, causing abdominal pain, nausea, vomiting and other uncomfortable symptoms. Therefore, for seafood lovers, they should be cautious when eating yams.
Although yams are highly nutritious, excessive consumption may also cause physical discomfort. Therefore, it is advisable to consume yam in moderation. Different people have different physiques and health conditions, and their tolerance to food is also different. Therefore, when eating yams, you should choose the right combination and amount according to your physique and health status.
The right cooking method can preserve the nutrients and taste of the yam to the greatest extent. Therefore, when cooking yams, one should choose a healthy and scientific cooking method.
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