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Protein Quiz

Protein Quiz - Free Protein Knowledge Test - FreudlyTake a free protein quiz to find out if you can identify the most protein-packed foods. Quick, no sign-up needed. Start now!en
With 16 questions and about 10 minutes to complete, the protein quiz checks practical understanding of protein sources, digestion, amino acids, food labels, and everyday meal choices. Your result shows how confidently you handle core protein concepts, helping you identify strengths and choose topics for further learning.
Questions: 1610 minutes
Protein Quiz: situation and reply bubbles
July 22, 2026July 22, 2026Material has been updatedJuly 22, 2026Material has been published
8,394 views
746 completions
667 likes
Daniel HallPsychologist · Test reviewer
667 likes
Scale Explorer

How the Scales are Structured

Protein KnowledgePK
Measures your knowledge of protein sources, functions, and practical nutrition concepts based on 16 quiz questions.
example score6/16
6/16Foundations to buildexample score
0 – 6Foundations to build
7 – 12Developing knowledge
13 – 16Strong knowledge
A score of 6 falls in the Foundations to build range, suggesting you know some basics but may benefit from reviewing protein sources, amino acids, and label comparisons.
just completed the test
DATA-BASED USER COHORTS

Who Usually Takes This Test?

Gym and fitness beginners
41%OF USERS
People starting strength training or weight loss take it to sanity-check what counts as protein and how to build simple high-protein meals.
Plant-based eaters
33%OF USERS
Vegetarians, vegans, and flexitarians use it to see if they know good plant protein sources, amino acids, and label basics.
Health-curious food shoppers
26%OF USERS
Everyday eaters take it for a quick refresher on digestion, protein-rich foods, and smarter choices at the store or when cooking.
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.
Shaded area — where most people score
Dot — the average
You — your score lands on each curve after the test— your score, after the test
Protein KnowledgePK
You?
Average7.4
Typical rangeTypical4.7 – 10.1
Possible0 – 16
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SAMPLE QUESTIONS

Example Questions From the Test

    • Insulin
    • Bile
    • Pepsin
    • Lactase
    • Leucine
    • Lysine
    • Tryptophan
    • Methionine
    • 9 grams of protein per 50-gram serving
    • 12 grams of protein per 80-gram serving
    • 20 grams of protein per 200-gram serving
    • 18 grams of protein per 90-gram serving
WHAT THE TEST MEASURES

Protein Quiz - Description and methodology of the test

People seeking a clearer grasp of everyday nutrition can use this protein quiz to examine how they reason about food sources, digestion, amino acids, labels, and meal planning. It suits learners, shoppers, and anyone checking whether familiar protein advice rests on sound principles. Its nutrition quiz about protein turns correct and incorrect choices into a practical snapshot of what to review next.

What This Assessment Measures

This assessment focuses on applied knowledge rather than personal intake. Questions cover plant and animal sources, complete and complementary proteins, essential amino acids, digestion, cooking, biological roles, energy values, protein density, label arithmetic, and meal distribution. It suits readers comparing foods or checking common nutrition claims. As a protein knowledge test, the result shows alignment with core concepts, not whether a diet is adequate.

One scale reports Protein Knowledge: 0-16. The catalogue uses three bands:

  • Foundations to build (0-6) means core sources, amino acids, and label comparisons need review.
  • Developing knowledge (7-12) shows many core ideas with room to improve practical comparisons.
  • Strong knowledge (13-16) reflects solid command of sources, functions, and food choices.

This educational score does not assess intake, health, or individual dietary needs.

Methodology and Evidence Base

Each item presents a nutrition question with four answer choices, asking you to select the option that best fits an established protein fact or practical food-choice problem. The set combines recall, comparison, calculation, and application: a respondent may identify pepsin, compare protein per serving, judge amino-acid completeness, or calculate whether label servings reach a target.

Scoring is straightforward: each correct answer contributes one point to the total. The resulting level describes performance on this questionnaire rather than a population norm, so a stronger result means more accurate responses across the covered topics. Read it as a guide to learning priorities and topic review.

The evidence base is conceptually consistent with the Dietary Protein Assessment Questionnaire (DPAQ) described by Gutjahr, Warren, and Miketinas (2023), with protein-knowledge work by Visser, Hung, and Verbeke (2021), and with the general nutrition framework of Parmenter and Wardle (1999). This protein assessment quiz is not an adaptation of those published instruments. Its online result has no population norms; guessing, attention, prior learning, and familiarity with nutrition terms can affect multiple-choice performance.

Literature:
  • Gutjahr P, Warren C, Miketinas D. Construct validity of a dietary protein assessment questionnaire to explore college students’ knowledge and attitudes towards dietary protein. Frontiers in Nutrition. 2023;10:1289946. 10.3389/fnut.2023.1289946
  • Visser M, Hung Y, Verbeke W. Protein Knowledge of Older Adults and Identification of Subgroups with Poor Knowledge. Nutrients. 2021;13(3):1006. 10.3390/nu13031006
  • Parmenter K, Wardle J. Development of a general nutrition knowledge questionnaire for adults. European Journal of Clinical Nutrition. 1999;53(4):298-308. 10.1038/sj.ejcn.1600726

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