The aim of this pilot study is to test the effect of a 30 day-D-chiro-inositol oral treatment on a set of clinical parameters (mainly sex hormones) in a group of male volunteers selected by their age and BMI to investigate if D-chiro-inositol acts as an aromatase inhibitor.

This is an open label clinical trial with a dietary supplement carried out in male volunteers selected by their age and BMI. The aim is to test the effect of oral daily treatment with 1 g D-chiro-inositol for 30 days on some clinical parameters, to see if D-chiro-inositol acts as an aromatase inhibitor. Testosterone, estradiol, Testosterone/Estradiol ratio, Dehydroepiandrosterone sulfate, Estrone, glycemia and insulinemia (with calculation of HOMA index), follicle-stimulating hormone, Luteinizing hormone, D-chiro-inositol and Myo-inositol serum concentrations have to be determined before and after D-chiro-inositol administration.

We wish to evaluate if this treatment for one month is able to change the sexual hormone levels, increasing androgens and decreasing estrogens. Furthermore, we wish to control the safety profile of D-chiro-inositol, a well-known molecule, different from the classic aromatase inhibitors. We think that our pilot study can open up new perspectives of research and therapeutic applications for this many-sided molecule.

Inclusion Criteria:

• Body mass index (BMI) range is between 22 and 34 kg/m2, in order to include subjects with normal weight, overweight and obese. Subjects with altered glycemia or hormonal status due to age or weight were enrolled in the study.

Exclusion Criteria:

• Men with poor general health were excluded from the study.