When you started InsideTracker, what was the problem that you believed almost everyone else was missing and you had to start this company?

At that time, it's weird because it's 17 years ago, but it looked like ages, that you can use biomarkers in your body in order to help you to optimize your health, not just treat disease.

Because at that time, it was nobody thought even about, let's take a look at your blood cholesterol or blood glucose or your HSCRP, which is a marker of inflammation, and instead to treat a disease, help us, people that are not sick, to optimize our body and actually prevent the disease or delay the disease.

So that was the idea.

And it was very hard to convince people at that time.

So when I was trying to raise money, I went to a venture capitalist and tried to explain it to them.

And they kicked me out of the room and said, are you crazy? Nobody will buy it.

What's one conclusion that you were genuinely convinced of 15 years ago or 20 years ago that the data has since forced you to rethink or behavior of people?