Once the talk of conspiracy theorists — the rich ingesting the blood of the young to foster longevity — is now a reality and an actual business in the United States. Not only is it a business but billionaires are actually admitting their interest in it.

"I'm looking into parabiosis stuff, which I think is really interesting. This is where they did the young blood into older mice and they found that had a massive rejuvenating effect," Peter Thiel, the billionaire co-founder of PayPal and adviser to Donald Trump told Inc. magazine. "I think there are a lot of these things that have been strangely under-explored."

But it's no longer an experiment with just mice. The startup company by Jesse Karmazin, Ambrosia, is doing this with humans, and the rich are lining up to get the blood of the young.