When it comes to supplements, I thought I had ticked all the boxes with my regular ritual of collagen , vitamin D and B12, hoping the combination would keep me dancing into old age. Then I was introduced to NAD+ (also known colloquially as NAD) and it threw me a curveball. Celebrities including Jennifer Aniston, Gwyneth Paltrow and Cat Deeley all hail NAD+ as the wonder supplement that keeps them feeling youthful in midlife, but it's not only the stars who are rolling out the red carpet for this supplement, which is why it's worth paying attention. Research is ongoing into whether boosting NAD could help prevent or ease symptoms for patients with Alzheimer's, which could be a huge anti-aging game-changer.

But what exactly is NAD and why do we need it?

"NAD+ is basically your body’s spa

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