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Nutrition & Healthy Eating Quiz — Test Your Diet Knowledge

Few topics touch every aspect of our daily lives quite like nutrition and healthy eating. From the moment we wake up to our last meal of the day, the food choices we make shape our energy, mood, and long-term health. Whether you're a seasoned nutritionist, a fitness enthusiast, or simply someone trying to eat a little better, understanding the science behind what we eat is endlessly fascinating — and surprisingly full of myths waiting to be busted.

This free healthy eating and nutrition quiz covers a broad range of topics designed to challenge all levels of knowledge. Across 10 carefully crafted questions, you'll encounter everything from essential vitamins and macronutrients to calorie counts, superfoods, and dietary guidelines. Difficulty ranges from accessible warm-up questions suitable for beginners to genuinely tricky queries that will test even those with a solid background in nutritional science. Each answer comes with a fascinating fun fact to deepen your understanding and make the experience genuinely educational.

Ready to find out how much you really know? The quiz is completely free and features a built-in timer to keep things exciting and sharpen your focus. Whether you're playing on your lunch break or challenging friends and family to beat your score, this is a brilliant way to learn something new about the food on your plate. Share your result afterwards and see who among your circle is the true nutrition champion — you might be surprised by who comes out on top!

Choose your difficulty and play now:

🟢 Easy
🟡 Medium
🔴 Hard

Sample Questions

Click any question to reveal the answer and a fun fact.

1Which macronutrient provides the most calories per gram?Reveal ›
ACarbohydrates
BProtein
CFat✓
DFibre
💡Fat provides 9 calories per gram — more than double the 4 calories per gram provided by both carbohydrates and protein. This is why small amounts of fatty foods can be surprisingly high in calories.
2Which vitamin is primarily produced by the skin when exposed to sunlight?Reveal ›
AVitamin A
BVitamin C
CVitamin K
DVitamin D✓
💡Vitamin D is nicknamed the 'sunshine vitamin' because UVB rays trigger its synthesis in the skin. Around 1 billion people worldwide are estimated to be deficient, making it one of the most common nutritional shortfalls globally.
3What is the recommended daily water intake for an average adult?Reveal ›
AAround 2 litres✓
BAround 500 millilitres
CAround 4 litres
DAround 1 litre
💡The NHS recommends approximately 6 to 8 glasses — roughly 1.5 to 2 litres — of fluid per day for adults. Surprisingly, around 20% of our daily water intake typically comes from the food we eat rather than drinks alone.
4Which fruit is well known for being the richest source of vitamin C?Reveal ›
AOrange
BStrawberry
CKiwi✓
DLemon
💡Kiwi fruit actually contains more vitamin C per 100g than oranges. A single kiwi provides around 93mg of vitamin C, exceeding the daily recommended intake — a fact that surprises most people who assume oranges reign supreme.
5Which mineral is essential for the production of red blood cells?Reveal ›
ACalcium
BIron✓
CZinc
DMagnesium
💡Iron is critical for producing haemoglobin, the protein in red blood cells that carries oxygen around the body. Iron deficiency anaemia is the world's most widespread nutritional disorder, affecting roughly 1.6 billion people globally.
6What does the term 'BMR' stand for in nutrition science?Reveal ›
ABody Mass Ratio
BBasal Metabolic Rate✓
CBlood Mineral Reserve
DBasic Macronutrient Range
💡Your Basal Metabolic Rate is the number of calories your body burns at complete rest just to maintain vital functions. For most adults it accounts for around 60–70% of total daily calorie expenditure — far more than exercise does.
7Which type of fat is considered most harmful to cardiovascular health?Reveal ›
AMonounsaturated fat
BPolyunsaturated fat
CTrans fat✓
DOmega-3 fat
💡Trans fats, often formed during industrial hydrogenation of vegetable oils, raise LDL ('bad') cholesterol while simultaneously lowering HDL ('good') cholesterol. The WHO estimates eliminating trans fats from global food supplies could save 500,000 lives annually.
8Approximately how many calories are in one gram of alcohol?Reveal ›
A4 calories
B9 calories
C7 calories✓
D2 calories
💡Alcohol delivers 7 calories per gram, placing it between carbohydrates (4 kcal/g) and fat (9 kcal/g). These are often called 'empty calories' because alcohol provides virtually no essential nutrients alongside its significant energy content.
9Which nutrient is primarily responsible for supporting healthy gut bacteria?Reveal ›
ASoluble fibre✓
BSaturated fat
CSimple sugars
DRetinol
💡Soluble fibre acts as a prebiotic, feeding beneficial gut bacteria such as Bifidobacterium and Lactobacillus. A thriving gut microbiome has been linked to improved immunity, mental health, and reduced risk of chronic disease — all from eating your oats and beans.
10Which amino acid is classified as 'essential' and cannot be synthesised by the human body?Reveal ›
AAlanine
BGlutamine
CLeucine✓
DTyrosine
💡Leucine is one of nine essential amino acids — meaning the body cannot produce it and it must be obtained entirely from food. It is particularly important for muscle protein synthesis and is found in high concentrations in eggs, chicken, and soya beans.

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Frequently Asked Questions

How many questions are in the Nutrition and Healthy Eating quiz?Show ›

The Nutrition and Healthy Eating quiz contains exactly 10 questions. They cover a wide range of subtopics including vitamins, macronutrients, superfoods, and dietary guidelines, with difficulty levels ranging from easy to hard to suit all players.

Is the Nutrition and Healthy Eating quiz free to play?Show ›

Yes, the Nutrition and Healthy Eating quiz is completely free to play with no sign-up or subscription required. Simply start the quiz, answer all 10 questions, and discover your score instantly — plus fun facts with every correct answer revealed.

How difficult is the Nutrition and Healthy Eating quiz?Show ›

The quiz is designed for mixed ability levels. Roughly three questions are straightforward and accessible to beginners, four are of medium difficulty, and three are genuinely challenging — perfect for those with deeper knowledge of nutritional science and healthy eating habits.

How does the Nutrition and Healthy Eating quiz work?Show ›

Each question presents four multiple-choice answers and a countdown timer to add a little pressure. Select your answer before time runs out, then see whether you were correct along with an interesting fun fact. At the end, your total score is revealed.

What topics does the Nutrition and Healthy Eating quiz cover?Show ›

The quiz covers a broad spectrum of nutrition topics including macronutrients, essential vitamins and minerals, calorie content of common foods, dietary guidelines, gut health, hydration, and the nutritional properties of specific foods recognised as particularly beneficial for health.

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