Question

identify the nutriens that you think provide the main sources of calories in both foods how do the sources of the calories in the two foods compare

Answer 1

I don’t see which two foods you mean — could you tell me the specific foods (or paste their nutrition labels)? Meanwhile here’s how to identify and compare the main calorie sources and a short example so you can do it yourself.

How to tell which nutrients supply the calories
- Look at grams of macronutrients on the label or nutrition data: carbohydrate, protein, fat (and alcohol if present).
- Convert to calories using the energy factors:
- Carbohydrate = 4 kcal/g
- Protein = 4 kcal/g
- Fat = 9 kcal/g
- Alcohol = 7 kcal/g
- Multiply grams × kcal/g for each nutrient to get calories from that nutrient, sum to get total calories, and compute each nutrient’s percent contribution.

Important caveats
- Fiber is listed under carbs but is not fully digested; some sources use ~2 kcal/g for fermentable fiber. Sugar alcohols also give fewer kcal/g.
- Food labels’ calories are rounded; small differences are normal.

Quick example (common comparison: apple vs. peanut butter)
- Medium apple (≈182 g): ~25 g carbs, 0.5 g protein, 0.3 g fat
- Carbs: 25 × 4 = 100 kcal
- Protein: 0.5 × 4 = 2 kcal
- Fat: 0.3 × 9 = 3 kcal
- Total ≈ 105 kcal → ~95% of calories from carbohydrate
- 2 tbsp peanut butter (≈32 g): ~16 g fat, 8 g protein, 6 g carbs
- Fat: 16 × 9 = 144 kcal
- Protein: 8 × 4 = 32 kcal
- Carbs: 6 × 4 = 24 kcal
- Total ≈ 200 kcal → ~72% calories from fat, ~16% from protein, ~12% from carbs

How the sources compare
- Foods high in fat are much more calorie-dense because fat provides 9 kcal/g versus 4 kcal/g for carbs/protein. So a smaller portion of a fatty food can supply more calories.
- Foods high in carbohydrates (fruits, grains, starchy vegetables) get most calories from carbs.
- Foods high in protein (lean meats, legumes) get a larger share from protein, but many protein-rich foods also contain fat (which raises calorie density).
- Alcohol (if present) adds significant calories (7 kcal/g) without contributing carbs/protein/fat grams.

If you tell me the two foods (or their labels/gram amounts), I’ll calculate the calories from each nutrient and give a direct comparison.