Nutritional info wrong - how to correct??

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I've just added a meal to my dinner tab by typing in the name of the food and finding it on the website. However the nutritional info the website provides is not the same info on the packaging. The website is adding calories, and the carbs,fat and protein are all different.
Is it possible to amend the info on the website so when it is being selected by people it is providing the correct nutritional info?

Thanks