A daily intake of approximately 6 μg vitamin B-12 appears to saturate all the vitamin B-12–related variables in Danish postmenopau

http://www.100md.com 《美国临床营养学杂志》 2006年第1期

    百拇医药网 http://www.100md.com/html/DirDu/2007/04/10/41/69/97.htm

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