Birchie, I would bet money that your Vitamin D levels are too low. One needs more sunshine than you receive to allow your body to make enough, and we tend to make less as we age. Vitamin D definitely aids with absorption of calcium. But you also need adequate Vitamin K2. There is a great
resource about K2 here. Quoting from it:
Vitamin K2 has a wide range of underappreciated health benefits:
It prevents calcium from going into all the wrong places and makes sure it gets into all the right places. For example, it keeps it out of your kidneys, where it would cause kidney stones, and keeps it out of your blood vessels, where it would cause heart disease, but helps it to get into your bones and teeth, making your bones strong and your teeth resistant to cavities.
It helps you make insulin and remain very sensitive to insulin. This means it helps stabilize your blood sugar, protects against diabetes, and prevents the metabolic problems that often arise as a consequence of obesity.
It helps improve exercise performance by enhancing your ability to utilize energy during bouts of physical activity.
It protects against cancer by suppressing the genes that make cells cancerous and expressing the genes that make cells healthy.
I supplement with 5000 IU (not mg) Vitamin D per day. The pill also has 90 mcg K2 (113% RDA). The above resource lists foods that are high in K2 but not many that I care to eat. Before I started supplementing with the current pill, a blood test put my Vitamin D level at 40 ng/mL which is pretty good, but it won't hurt to get it a little higher. Great protection against cancer recurrence.
Speaking of cancer, studies have shown that women who take a mulitvitamin are at greater risk of cancer, as are women who oversupplement with calcium. I'm not sure why - it may be that massive levels of vitamins are not a good thing, which my intuition has always told me anyway. It is so much better to get our nutrients from real food!
I am running as fast as I can to stay in the same place, i.e. working hard to control my eating and maintain my weight at 125. Overeating is such a comfort, as is being lazy

I'd sure like to see 123 or at least a consistent 124 before the new year.