Mayo Clinic Minute: How much vitamin D do you need? - YouTube

Vitamin D Toxicity Rare in People Who Take Supplements ... - YouTube

Vitamin D and Your Health - WebMD

How much Vitamin D should I take? - YouTube

What Vitamin D Does For Your Body - WebMD

As winter approaches, do you need the supplement Vitamin D? - YouTube

Ludacris - Vitamin D (feat. Ty Dolla $ign) [Official Video] - YouTube

Official behind the scenes "Vitamin D" - YouTube

Vitamin D - YouTube

Robert Lustig, MD: How Does Vitamin D Works in Your Body? - YouTube