The Consumer Council warned against so-called non-surgical cosmetic treatments, including injections of skin whitener, placenta extract and even carbon dioxide. It also warned against 'gold-thread facelifts', in which a tube is inserted into the face under local anaesthetic and a golden web is threaded into the skin to achieve fuller skin tone. Experts say there is scant scientific evidence to support claims made by the manufacturers of many such products. The council urged the government to speed up regulation of medical devices in Hong Kong. The council also warned consumers to be alert to dubious holiday schemes. It revealed a tactic in which customers are contacted to pick up a prize for taking part in a survey and invited to a travel seminar. But the council warned that customers would be subjected to gruelling sales pitches to join a travel scheme. As the council was issuing its warning yesterday, a Sing Tao Daily photographer was allegedly attacked by a woman from a travel company in Tsim Sha Tsui who tried to stop him taking photos for a story on a suspicious travel scheme. The photographer was pushed to the ground in front of a police officer and a customer who said he had been cheated out of HK$70,000 last month at the Pilkem Commercial Centre in Pilkem Street. The 45-year-old woman was arrested for assault.