text: i'm 52 years,exercise 5 days a week ,weights and cardio however i losing muscle fast toning exercise dont work i am a female going through menopause you need to talk to your doctor about a vitamin supplement for women going through menopause.  let the dr. know what kinds of exercises you are doing, and he might be able to give you an idea of nutrients you are lacking to keep up the muslce tone.  most likely though you need more protein in your diet.  using a high protein supplement is good like the powder shake stuff you can get at gnc.  and they have made huge advancements in the flavor and taste of that stuff, so it doesn't taste like powdered evil anymore.