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

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.