SwansonVitamin D3 Highest Potency

Vitamin D is a fat-soluble vitamin that belongs to the essential micronutrients. It occurs in various forms, of which D2 and D3 are the best known. Vitamin D is often added to food supplements in situations where additional intake is desired.

Vitamin D2 (ergocalciferol) is usually of plant origin, while D3 (cholecalciferol) generally comes from animal sources. D3 is the most commonly used form in supplements because of its high bioavailability and wide application.

Vitamin D naturally occurs in a limited number of foods, such as certain types of oily fish, eggs, and fortified products like margarine or plant-based drinks. Intake through food can therefore vary per person and diet.

Because vitamin D is a fat-soluble vitamin, it is often recommended to take it with a meal that contains fat. This can contribute to optimal absorption of the vitamin in the body.