The paper, 'Nutritional content of supermarket ready meals and recipes by television chefs in the United Kingdom: a cross sectional study', by Simon Howard, Jean Adams and Martin White in Newcastle University, compared nutrient contents of supermarkets' own-brand ready meals with recipes from four TV chefs.

The recipes they used in their study were from 30 Minute Meals and Ministry Of Food by Jamie Oliver, Baking Made Easy by Lorraine Pascale, Nigella Lawson’s Kitchen and River Cottage Everyday by Hugh Fearnley-Whittingstall.

After selecting 100 random recipes from them, they compared the nutritional content with 100 own-brand ready meals from Tesco, Asda and Sainsbury’s.

Jamie Oliver is one chef who is a massive advocate of healthy eating, especially within British schools, and even took his School Dinners Campaign all the way to the Biritsh Prime Minister to push for healthier school dinners for children.

The celebrity chefs' recipes were found to be more unhealthy in terms of energy, fat and fibre content.

Their recipes all have higher fat, saturated fat and calorie contents per serving than the supermarket ready meals. They also tend to have less fibre per serving.

Nutritionist Nicole Berberian thinks that having more information would be helpful.