Vitamin D, widely known as the Sunshine Vitamin, is produced and stored naturally in the body as a response to the skin’s exposure to sunlight. It makes the list as one of the most important vitamins in the vitamin library due to its responsibility in the proper function of the entire body. Over 50% of the population suffer from vitamin D deficiency in the UK, the majority of this group being of ethnic origin. Deficiency can be linked to a number of health issues, including depression (commonly known as seasonal depression), bone and muscle pain or reoccurring infections.

Without decent exposure to sunlight, supplementation via food intake is highly ineffective due to the fact that its production is heavily reliant on sun exposure.