Don't listen to this. Just talk to your doctor and supplement. The main way that humans get vitamin D is sunlight. If you aren't outdoors a lot or live far nort

Don't listen to this. Just talk to your doctor and supplement. The main way that humans get vitamin D is sunlight. If you aren't outdoors a lot or live far north it's even more likely you need it. It would be good to get tested by your doctor, maybe with your current lifestyle you are just fine and your vitamin D levels are normal. Mine weren't, taking supplements got it back up to normal.