No effect of monthly supplementation with vitamin D in older people

I have a difficult time believing this because two years ago I started losing energy and was not feeling as well as I had been. My doctor ran some tests, put me on D3 supplements, and within one week I started feeling more energetic and after a month I was back to feeling well.

My wife was then also tested, with the same result. I believe there is enough evidence that D3 helps brain health, balance, and energy levels to make it worthwhile to take supplemental D3.

The abstract says "muscle function." In the keywords is "grip strenght". As I watch my parents age, balance (read: primarily legs) is far more important than grip strenght.

Some can get hurt falling in the shower. No one has been hospitalized for not being to open a jar of jelly.