Losing weight tends to pose a considerable challenge to those of us who have a lifestyle which involves frequent visits to restaurants. Dining out has gone from being a rarity to almost becoming a twice weekly norm for a huge number of people. And when we are not eating out, we’re calling up for a take-away and serving up food which frequently tends to be greater in both fatty content and portion size.Losing weight becomes more difficult when your lifestyle is such that you eat in this way. Restaurant portion sizes tend to be bigger. Not only that they tend…