Before Photo only w/ question

D can be found in Fats, because it's a Fat soluable yes.

D can be made in people but only with 15+ minutes exposure to sunlight, which Cholesterol helps to make happen.

Unfortunately many people cannot acheive consistent exposure like this, meaning it sometimes may happen for many but not enough.

Actually eating properly doesn't always negate the need to supp. Many people believe Vit C requires supplementing, as it's the worst vitamin to eat a lot of.

The highest carrier is Pink Guava at 165 mg's, then it's Broccoli at around 130-140, I think per normal sized portion, then lower down stuff like Tomatos, Potatos etc etc.

Some people dose as much as 2-3+ g Vit C a day. Imagine having a 2g dose of Vit C daily from food?

You'd need about 10 Pink Guavas, and 4 large Potatos / 2.5 Broccoli portions a day, which is a bit much to expect most people to eat.

The RDA is around 75-90, one of those numbers is the Female one, one Male, but many think that's a bit weedy as an intake, (10mg's will be enough to avoid Scurvy), but realistically, even having an RDA 5x greater, would put pressure on people, who eat well and in the right portions, to eat more of certain foods than might be desirable, and people don't want extra stress to eat well, or be told, you MUST supplement, which is not why RDA's are designed, so people feel guilt tripped into supplementing.

I'm sure RDA's aren't designed to subtly wean people onto Supplements, unless there's a sneaky conspiracy people have missed.

D is also fortified in many foods too. You can't discredit milk (: