I ve low testosterone , but normal periods, i heard that can cause bone loss, how much calcium and vit d per day i should take, ? i am 38 yr old femal

Relax: You're supposed to have relatively low testosterone, after all, you're a female. If you're having normal menses, you're protected against significant bone loss until menopause. However, if you're caucasian or asian or have chronic illness (liver, kidney, rheumatoid arthritis, etc) or take anti seizure meds, steroids or the like you're more prone. Exercise, take calcium (diet) and vitamin d.