Which vitamin is most difficult to obtain from natural dietary sources, although it may be found in several fortified foods?

Question

Quizplus · Accepted Answer

Vitamin D is known to be difficult to obtain in sufficient amounts from natural dietary sources alone. It is naturally present in a few foods, such as fatty fish and egg yolks, and is added to others, like milk and some cereals (fortified foods). However, the primary source of vitamin D for most people is sunlight exposure, which enables the body to synthesize it. This can be challenging for individuals living in higher latitudes, during winter months, or for those who spend little time outdoors or use sunscreen diligently, making vitamin D unique among vitamins for its synthesis method.

Which Vitamin Is Most Difficult to Obtain from Natural Dietary