There is as much vitamins and nutrients in frozen vegetables as in fresh ones. This is due to the fact that they have been quickly frozen after picking to preserve their properties, unlike “fresh” ones that can stay for days in a storage or display.
The skin of arctic tribes people are dark because they get all their vitamin D from fish instead of sunlight. Their skin does not need to lighten to try and get more sun for vitamin D production.
Vitamin D deficiency is linked with many health disorders, including depression. In a survey of almost 8,000 US residents, it was found that those with lower vitamin D levels “are at a significantly higher risk of showing depression”.