New Delhi: With celebrities facing flak over the Maggi controversy, former Samajwadi Party leader Amar Singh today demanded penal action against public figure who endorse products like 'pan masala' and alcohol.

He also said that celebrities should be more "sensitive" while endorsing food products. "Children like to see uncle Bachchan endorse... These people should be more sensitive to what they endorse, especially food products," said Singh, who was once considered close to the Bachchan family.