Does anyone know why this might happen? I was tested at 23 fifteen months ago, and went on 1000IU/day for 3 months. I then tested at 28, still below normal (32-100), so went on 2000 IU/day for a year. Now I've dropped to 27! I also am a heavy milk drinker and always have been--3 glasses a day. I take fish oil, Boniva and glucosamine/chondroitin. We have a family history of breast cancer and osteoporosis so I really want to get these levels up. I'm 57 years old.
Thanks.
Sue