Vitamin D is an essential nutrient for immune, bone and muscle health, but in recent years there has been confusion surrounding the optimal delivery method.

OK, perhaps that is not quite true: few would argue that there is a superior source of vitamin D than the sun. In a perfect world, we would all enjoy the refulgent glow of sunlight on our skin each day. Of course, the sun provides nourishment that goes beyond topping up our vitamin D levels – but for the purpose of this article, we will focus exclusively on its vitamin D-stimulating ability.

The climate being what it is, supplementation is required for many of us to achieve healthy blood levels of vitamin D, and to enjoy the attendant benefits for immunity, energy, muscle strength and bone and mental health. Indeed, Public Health England recommends that adults and children aged one and over consider using a daily supplement containing 10mcg of vitamin D – especially during autumn and winter.

Those who are at an elevated risk of deficiency, meanwhile, such as people with dark skin and those who spend prolonged periods indoors (i.e. nightshift workers) are advised to supplement year round.

But which form of supplement is best: vitamin D tablets, vitamin D spray or sublingual vitamin D? In this blog, we intend to summarise the key differences.