Figure 1From: Consumption and biochemical impact of commercially available plant-derived nutritional supplements. An observational pilot-study on recreational athletesSpecific values of plasma progesterone in 10 “users”. 0,4 ng/ml (red line) represents the upper limit of the reference range in males. Female subjects are indicated with red circles. The x axis represents the subject identification number and the y axis represents the values of plasma progesterone.Back to article page