Centenarians are centenarians because they are blessed with good genes. I know of centenarians who guzzle beer by the pint, smoke a pack a day, gorge on fried chicken and fatty steak and whose idea of exercise is lifting the morning papers off the table.
Good dietary and lifestyle advice is for the rest of us with lousy genes and family history of chronic diseases, cancer and sudden death. Especially so in Singapore, where not many people have the money and connections to afford access to the best medical care, unlike the nonagenarian old fart.