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通常认为,维生素C是水溶性维生素过量时可以无害地从尿中排出,因此可以大胆过量使用。但最近的资料指出,长期大量吸用维生素C,并不是绝对安全和无害的。一方面,维生素C对人体有许多功用,而且人类自己不能在体内合成,必须由食物供给。另一方面,过量摄入维生素C却司能有以下几方面危害:①大量持续摄入,可使尿内草酸盐增加,有促使尿路结石形成的可能;②怀孕的母体过量摄入维生素C,使新生儿也需要大量维生素C,如不足,则导致疾病;③有导致糖尿病发生的可能;④大量摄入维生素C,能增加维生素B_1的需要量;⑤每日摄入维生素C1克,可使胃肠道蠕幼亢进,引起腹痛
It is generally believed that vitamin C is a water-soluble vitamin that can be excreted harmlessly from the urine, it can be bold over-used. However, recent data indicate that long-term intensive use of vitamin C is not absolutely safe and harmless. On the one hand, vitamin C has many functions on the human body, and human beings themselves can not be synthesized in the body and must be supplied by food. On the other hand, excessive intake of vitamin C, but the Secretary can have the following hazards: ① a large number of continuous intake, can increase the oxalate in the urine, promote the formation of urinary tract stones may be; ② pregnancy maternal excessive intake of vitamins C, so that newborns also need a lot of vitamin C, such as inadequate, leading to disease; ③ may lead to the possibility of diabetes; ④ large intake of vitamin C, vitamin B_1 can increase the demand; ⑤ daily intake of vitamin C1 grams, Can make the gastrointestinal tract hyperthyroidism, causing abdominal pain