> According to a 2011 study, 41.6% of adults in the US are deficient. This number goes up to 69.2% in Hispanics and 82.1% in African-Americans
That's not exactly "most people". That's for the US where a lot of states are very temperate and the sunlight is present during winter.
Imagine how bad it gets up north.
It's true that the body will produce vitamin D in the right conditions, but unless you get those conditions it won't. Taking supplements is the easy road, especially at prescription levels.
Vitamin D is not water soluble, so you won't urinate it out. This means that you can get prescribed an injection or a big pill and be fine for weeks.
> According to a 2011 study, 41.6% of adults in the US are deficient. This number goes up to 69.2% in Hispanics and 82.1% in African-Americans
That's not exactly "most people". That's for the US where a lot of states are very temperate and the sunlight is present during winter.
Imagine how bad it gets up north.
It's true that the body will produce vitamin D in the right conditions, but unless you get those conditions it won't. Taking supplements is the easy road, especially at prescription levels.
Vitamin D is not water soluble, so you won't urinate it out. This means that you can get prescribed an injection or a big pill and be fine for weeks.