Sir; I write in response to last week's comment piece by Salmin Amin, Pepsico UK President, in which he states that Guideline Daily Amount figures were developed in partnership with government.

I would like to clarify that the current GDA figures were developed by IGD, with input from their membership of food manufacturers, distributors and retailers.

The FSA was not a partner in this activity and GDAs should not be seen as official recommended government figures.

We do, however, fully recognise from our research that some consumers find GDA ­information useful.

But the key factor in helping people make healthier choices was the use of traffic light colours.