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( Soy milk)
Soy milk (also called soya milk, soybean milk, or soy juice) and sometimes referred to as soy drink/beverage is a beverage made from soy beans. A stable emulsion of oil, water and protein, it is produced by soaking dry soybeans, and grinding them with water. Soy milk contains about the same proportion of protein as cow's milk~ around 3.5%; also 2% fat, 2.9% carbohydrate and 0.5% ash. Soy milk can be made at home with traditional kitchen tools or with a soy milk machine. The oldest evidence of soy milk production is from China where a kitchen scene proving use of soy milk is incised on a stone slab dated around A.D. 25~220.[1] It also appeared in a chapter called Four Taboos (Szu-Hui) in the A.D. 82 book called Lunheng by Wang Chong, possibly the first written record of soy milk. Evidence of soy milk is rare prior to the 20th century and widespread usage before then is unlikely.[1] According to popular tradition in China, soy milk was developed by Liu An for medicinal purposes, although there is no historical evidence for this legend.[1] This legend appeared in the late 15th century in Bencao Gangmu, where Li was attributed to the development of tofu with no mention of soy milk. Later writers in Asia and the West additionally attributed development of soy milk development to Liu An, assuming that he could not have made tofu without making soy milk. However, it is likely that Liu An has been falsely attributed to the development of tofu by writers 1000 years later from his time.[2] The Chinese term for soy milk is "??" (Pinyin dòu jiang; lit. bean + a thick liquid). In Western nations, soy milk products packaged for Chinese-speaking consumers may be labeled "??" . However, there are products in China called dòu nai (??), which are made from a mix of cow milk powder and ground, dried soybean.[3][4] The Japanese term for soy milk is tonyu(??) which contains no cow milk. In Singapore, it is known as tau-huey-tzui (???) in the local Hokkien dialect while in Malaysia it is known as "susu soya" or "air tauhu" in the local Malay language. Soy milk is commonly available in vanilla and chocolate flavors as well as its original unflavored form. Plain soy milk is unsweetened, although most products comes as sweetened, drinking salted soy milk is still very common in China.[5] In many countries, this product may not be sold under the name milk since it is not a dairy product, hence the name soy drink.
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