Vitamin D is an essential nutrient involved in various physiological functions, from maintaining healthy bones and teeth to supporting normal muscle function and proper immune function. Unlike many other vitamins, the body can produce it directly through the skin’s exposure to ultraviolet radiation.
But is sunlight alone sufficient to meet our Vitamin D needs? In this article, we’ll answer this question by exploring this micronutrient’s characteristics, the main factors that influence its availability in the body, and the role of diet and supplementation in ensuring adequate intake.
What is Vitamin D and what is it used for?
Vitamin D is a fat-soluble vitamin that can be synthesized when UVB rays act on the skin or obtained from external sources. In both cases, it undergoes a series of metabolic transformations before reaching its biologically active form.
Among its main functions, it helps to:
- promote the absorption and utilization of calcium and phosphorus;
- maintain normal bones and teeth;
- support normal muscle function;
- sustain proper immune function.
More sun means more Vitamin D?
The relationship between sunlight and vitamin D might seem intuitive: the more exposure to ultraviolet radiation, the greater the body’s endogenous vitamin D production should be. However, scientific evidence shows that this relationship is not that simple.
In fact, several factors can influence the skin’s synthesis of Vitamin D, including age, skin pigmentation, season, latitude, the duration and intensity of sun exposure, as well as lifestyle and dietary habits.
For this reason, sunlight alone is not necessarily enough to ensure adequate Vitamin D intake. The amount the body produces can vary significantly based on individual characteristics and environmental conditions.
Vitamin D: diet and supplements
Because the amount of vitamin D in the body is influenced by various factors, endogenous synthesis may not always meet the body’s needs. In such cases, additional vitamin D can come from external sources, starting with diet – for example, through fatty fish, egg yolks, and certain cheeses – and, when necessary, through supplementation.
In dietary supplement formulations, in particular, two forms are primarily used:
- Vitamin D2 (ergocalciferol): derived mainly from fungal sources;
- Vitamin D3 (cholecalciferol): the same form synthesized by the skin following exposure to UVB rays and generally more effective at increasing and maintaining blood levels over time. Since it is a fat-soluble vitamin, its absorption can also be enhanced by the presence of fats in a meal.
Flarer and the nutraceutical industry
Vitamin D is just one example of the role that the nutraceutical and pharmaceutical industries can play in supplementing nutrient intake when diet and other sources are insufficient to meet nutritional needs. Used in both sectors, Vitamin D is incorporated into various types of formulations and products.
To develop formulations that meet these needs, selecting raw materials is a critical step. That is why we put our nutraceutical experience at the service of companies, supporting them in sourcing vitamins and other high-value-added nutrients through a portfolio of carefully selected ingredients. For more information, contact our team.