If it would add a decade to your life, would you allow the blood of young people to be injected into your veins? I understand that this may sound very strange to you, but the truth is that interest in this sort of "anti-aging therapy" has surged among the elite in recent years. And now a company called Ambrosia has opened clinics in five major U.S. cities where you can actually have "youthful blood" injected directly into your veins. But it isn't cheap. According to Jesse Karmazin, the founder of Ambrosia, having one liter of young blood injected into you will cost $8,000 and getting two liters of young blood will set you back $12,000…