Actor Aamir Khan’s appointment as the national brand ambassador for UNICEF to promote child nutrition has raised eyebrows. The actor, who was in the Capital on Wednesday, was asked how he could promote nutrition in light of his “tainted past” the fact that he endorsed a soft drink brand that causes malnutrition among children.

“I don’t have a tainted past. I haven’t done any work till date that would hurt anyone… at least not deliberately. But, if anyone still got hurt then I’d just say sorry to them from the bottom of my heart,” said the 46-year-old actor.

“I did that ad long time ago. I don’t even endorse the brand anymore,” he added. Taking his new role seriously, Khan said he will use his movies to make a difference in the society. “I did Taare Zameen Par because these things (issues) touch me emotionally. It took me two years for this one and that wasn’t just for the sake of it. These things are not a burden on me. It is a responsibility and I want to reach out to more people.”

The actor-producer, who will be seen next in Reema Kagti’s Talaash, said he is not sure what makes him successful. “My films have been working in the past few years but I don’t know what my success mantra is. It is people’s blessings,” he said.