Today, more people are living past 100 than ever before — even though the maximum human lifespan hasn’t moved past 115 years. But is that about to change?

The Limit host Daniel T. Allen spent months talking to medical researchers, biohackers, and centenarians. He also went through a battery of tests worth over $12,000 at a longevity clinic to find out how long he might live.

In this episode, Business Insider looked into what could radically extend human lifespan, including FDA-approved drugs, cellular reprogramming, and Bryan Johnson’s $2 million \.