As a supplier of dietary supplements including vitamin D, we are often asked by customers how best to quickly elevate blood vitamin D levels.

It is not such a strange question. After all, everyone should make a conscious effort to ensure an optimal intake of vitamin D, whether via sunshine, food, supplements or a combination of all three. And research suggests many of us fail to get enough.

The evidence for vitamin D is overwhelming: not only does the Sunshine vitamin aid immune health, bone and muscle function, teeth and cell integrity and wound healing, but it also appears to help protect against depression and cognitive decline.

Those who suspect they may be deficient – even seriously deficient – will naturally wonder how they can quickly increase their vitamin D levels. We intend to tell you how.