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User:Bici

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As early as March of 1984, Carmel Bernstein and a team of investigators published evidence in the Journal of Clinical Investigations (73;3, Vitamin B-12 in human seminal plasma) revealing that blood has one-tenth the amount of B-12 as does male semen. Eight years later, the Scandanavian Journal of Clinical Laboratory Investigations (Hansen, 1992 Nov;52(7):647-52) determined that B-12 levels in human semen run as high as 20 times that of blood. Similar amounts of B-12 have been found in vaginal secretions.