Riboflavin Content in Male Spermoplasm

Riboflavin concentration in male spermoplasm depends on consumption of vitamin B2 and is 3-50 times higher than in the blood plasma, depending on the riboflavin status. Normal levels of riboflavin content in the spermoplasm were evaluated by investigating the metabolic relationship between riboflavin concentration in the spermoplasm and blood plasma and the relationship between riboflavin saturation of the spermoplasm and the duration of treatment with vitamin B2. Both methods yielded close values: 60-130 and 85-96 ng/ml, hence, 80 ng/ml can be taken for the lower normal threshold level of riboflavin in the spermoplasm.