I eat some fruit every day, but not too much and almost no processed food. I stay away from sweets, except 80 per cent chocolate.

The idea that ageing was subject to control was completely unexpected.

In principle, if you understood the mechanisms of keeping things repaired, you could keep things going indefinitely.

Carbohydrates, and especially refined ones like sugar, make you produce lots of extra insulin. I've been keeping my intake really low ever since I discovered this. I've cut out all starch such as potatoes, noodles, rice, bread and pasta.

If I were a worm, I would rather be the long-lived mutant than the normal worm, that's for sure.

I loved the idea that biology was logical.

I eat some fruit every day, but not too much and almost no processed food. I stay away from sweets, except 80 per cent chocolate.