You're listening to Bullproof Radio with Dave Asprey.

Today's cool fact of the day is that people with a variation of the CYP1A2 gene metabolized

caffeine more slowly and if they drink more than a couple cups of it, they have a higher

risk.

And fact number two, the ACTN3 gene influences your muscle fiber type.

The more fast twitched muscles you have, the lower your capacity to burn fat, which is one

reason sprint and power athletes tend to be a little bulkier than endurance runners.

And among the six DNA variants that influence your heft, the most critical is called the

FTO gene.

And you may also have different genes.

If you're redhead, that makes you more tolerant of certain types of pain than other people.

And you might require way more pain killer than people who are not redheads.

So genes do a lot of cool stuff.

And the reason I'm bringing all this up is my new book Game Changers, where I've distilled

the knowledge from more than 450 interviews on the show into a set of 46 laws for high

performers, which you can order now.

And I would ask if you love the show.

Please support the show by picking up your copy of Game Changers online now.

One of the laws in there is called Track to Hack.

And the idea is that if you want to change something about the way your biology performs,

the way your body serves you, the way you show up in the world, you might want to measure

it because then you'll know what to do and you'll know whether what you're doing is working.

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