high total testosterone

Trying to figure out my labs... not on any exogenous hormones. (I do take metformin for anti-aging/cancer) 46 yo... BMI 23... weightlifting 5-6 times/week... hard to gain muscle mass... kind of down in the evenings. Total T: 874 ng/dL Free T: 60 pg/ml FSH: 4.3 mIU/mL LH: 2.8 mIU/mL Seems...