Sorry if this is a stupid question - but I'm just starting getting serious about my nutrition and some of these labels are confusing me!

For example, a duck fillet versus a chicken fillet.
Nutrition information in both case is rather similar: per 100g, a chicken fillet contains 32g of protein, the duck 21g. In both case, the total of salt, carbs, fiber, fats is roughly 10g, in roughly similar proportions.

So question 1: if a chicken fillet is made of 32g+10g = 42g of various macronutrients, what are the remaining 58g made off? I suspect water but I'm not sure.

And then, question 2 for the bonus points - if it is indeed water, then is it correct to say that the duck fillet and the chicken fillet both provide identical nutrients, but the chicken just contains more protein - and the duck more water? Ie, there is no benefit eating duck over chicken (especially considering the higher duck price) - or , in other words, there is nothing that make the duck 'special' compared to the chicken.

Thanks in advance guys!!!

I don't know. but as for the second question. Just because two products have similar values of nutritients doesn't mean they are equally good. The qualit of the protein, fats, etc comes into play, aswell as vitamins, minerals...

Try this..Nutrition Facts and Analysis for Duck, young duckling, domesticated, White Pekin, breast, meat only, boneless, cooked without skin, broiled

Its probably made up of buckshot.

Seriously though its probably water content fat carbs and a whole lot of other stuff I dont know about