82. Andrew Steele — Olympian and head of product at DNAFit

Olympic medalist Andrew Steele knows that our current knowledge about genetics isn't enough to give complete predictions about health. Nevertheless, the company where he is Head of Product, DNAFit, is one of a number of organizations drawing on genetic data to give customers advice about their diet and exercise regimen. It uses a customer's DNA sample to create a personalized profile which provides diet and training advice that it believes best suits them, according to some limited genetic studies. Steele says it's about "learning more about you so you can better reach your goal" — and it seems he's onto something. Former England international footballer Rio Ferdinand announced a "significant" investment in the company last year.

Read more: A company used a sample of my DNA to tell me how I should eat and work out — here's the verdict