Supplementing vitamin D has had a large impact on my life. A couple years ago, I frequently felt lethargic and was always getting sick. I randomly got a blood test, and it said that everything was fine except my vitamin D levels, which were at 7 ng/ml (!!), when the recommendation is 20-30+ ng/ml. Within the first two weeks of supplementing vitamin D, my health went back to normal.
The same thing happened to one of my friends earlier this year. He started getting all sorts of weird diseases when he used to never get sick. After getting a blood test and learning his vitamin D levels were low, he started taking it and he hasn't gotten sick since.
So even if there is big money behind it, I think it's worth getting tested if you spend a lot of time indoors.
The same thing happened to one of my friends earlier this year. He started getting all sorts of weird diseases when he used to never get sick. After getting a blood test and learning his vitamin D levels were low, he started taking it and he hasn't gotten sick since.
So even if there is big money behind it, I think it's worth getting tested if you spend a lot of time indoors.