vitamin D

Vitamin Determination: An oilman becomes a health care renegade

Allan Markin is one of Alberta’s richest men—and a crusader to get Canadians to take more vitamin D. Misguided eccentric, or visionary?

Which vitamins and supplements actually work?

St. John’s wort makes the cut, but stop wasting your money on raspberry ketones

The truth about vitamin D

Is the idea that everyone needs more of it justified?