Tomas is a 24-year-old male trying to calculate his protein needs. The Food and Nutrition Board recommends that 10% to 35% of calories come from protein. If Tomas follows a 2,300-kcal diet, how many grams of protein per day should he be consuming?

Question

BlackTom AI · Accepted Answer

To determine Tomas's daily protein requirement from a 2,300-kcal diet using the recommended 10%–35% of calories from protein, we convert calories from protein to grams.
First, calculate the lower bound: 10% of 2,300 kcal = 0.10 × 2,300 = 230 kcal. Since each gram of protein provides about 4 kcal, 230 kcal ÷ 4 kcal/g = 57.5 g of protein per day.
Next, calculate the upper bound: 35% of 2,300 kcal = 0.35 × 2,300 = 805 kcal. Converting to grams: 805 kcal ÷ 4 kcal/g = 201.25 g of protein per day.
Therefore, the target range is approximately 57.5–201.25 g per day, often rounded to 58–201 g per day for practical purposes.
Option by option:
Option 1: "23 to 81 grams of protein per day". This range corresponds to a much smaller percentage of calories from protein (roughly 4–14%), which is inconsistent with the 10%–35% guideline and would underrepresent needs at the lower end.
Option 2: "26 to 89 grams of protein per day". This range still sits well below the calculated lower bound (about 58 g) for a 2,300 kcal diet, misaligning with the official 10% minimum.
Option 3: "58 to 201 grams of protein per day". This exactly matches the rounded lower and upper bounds derived from 10%–35% of 2,300 kcal, making it the correct range for Tomas’s protein intake.
Option 4: "230 to 805 grams of protein per day". This option multiplies the kcal by 10–35% but then misinterprets the conversion, as it uses the kcal values directly as grams without dividing by 4 kcal/g, resulting in an unrealistically large amount of protein.
In summary, the correct interpretation lies in converting the calorie percentages to grams using the 4 kcal per gram rule, yielding 58–201 g/day, which matches Option 3, while the other options reflect common mistakes in unit conversion or misapplication of the percentage range.

Tomas is a 24-year-old male trying to calculate his protein needs. The Food and Nutrition Board recommends that 10% to 35% of calories come from protein. If Tomas follows a 2,300-kcal diet, how many grams of protein per day should he be consuming?单项选择题

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