But a quick family visit home before heading to Europe changed everything.
"I saw a very old man eating his own human waste for food," Krishnan said. "It really hurt me so much. I was literally shocked for a second. After that, I started feeding that man and decided this is what I should do the rest of my lifetime."
Krishnan was visiting a temple in the south Indian city of Madurai in 2002 when he saw the man under a bridge. Haunted by the image, Krishnan quit his job within the week and returned home for good, convinced of his new destiny.
"That spark and that inspiration is a driving force still inside me as a flame -- to serve all the mentally ill destitutes and people who cannot take care of themselves," Krishnan said.
Krishnan founded his nonprofit Akshaya Trust in 2003. Now 29, he has served more than 1.2 million meals -- breakfast, lunch and dinner -- to India's homeless and destitute, mostly elderly people abandoned by their families and often abused.