some quantative numpty nutritionaly questions

hunnymonster

Maybe if there is an agreed answer these could make it to the stickys. In any case I would appreciate the answers if anyone knows them.




When people talk about nutrition and say things like

eat 5 protein based meals per day and 1 gram of protein per kg of body weight......
I take it they don't mean protein in the strictest definition (C49H62N10O12) rather any common polypeptide of amino acids. But I'm unclear if it is one gram of the polypeptide itself or say 1 gram of chicken breast (which I believe has approx 22g protein per 100g). Are the values per day or per meal

Also when people talk about a 40%/30%/30% dietary make-up for the macronutrients, are they working out the values based on weight, calorie content or something else?









note in the examples above, I'm not interested if you think the acutal amounts are ridiculous, I just want the units so I can compare different systems.

BrianD3

In answer to the first one , yes it is one gram of polypeptide. So if you eat 100 g of chicken and 22 g of that is protein you say you've eaten 22g of protein not 100 g! Also the values are per day.

The 2nd one about the macronutrient percentages I wouldn't get too hung up on these but I believe it is based on calorie percentages based on weight. You take in 100 g of chicken, 22 g of that is protein, lets say 10 is fat, 5 is carbs and the rest water. 22 by x gives the protein calories, 10 by y gives the fat calories, 5 by z gives the carb calories.

hunnymonster

Thanks Brian, I appreciate the answers.