SHBG and polycystic ovary syndrome: Our meta-analysis indicated that magnesium supplementation does not significantly affect DHEA (MD: −5.13 μg/dL; 95% CI: −43.26, 33.00, I2 = 80.20%), testosterone (MD: −0.16 ng/dL; 95% CI: −0.50, 0.18, I2 = 76.64%), FAI (MD: −0.11; 95% CI: −1.30, 1.08, I2 = 0.00%), and SHBG (MD: 0.81 nmol/L; 95% CI: −8.32, 9.93, I2 = 0.00%) levels in patients with PCOS (Figure 7).