Citrus fruits are well known for which vitamin?
AnswerVitamin C
Oranges, lemons and limes are rich in vitamin C.
Health · Facts & stats
Nutri facts & stats
7 fact-checked facts about nutrition basics, nutrients and healthy eating facts, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What does a food calorie measure?
AnswerEnergy
Calories measure the energy food provides.
Going deeper
How many calories per gram do protein and carbohydrates each provide?
Answer4
Protein and carbohydrates each supply about 4 calories per gram.
Carrots are rich in which compound the body converts to vitamin A?
AnswerBeta-carotene
Beta-carotene gives carrots their orange color.
Which protein in red blood cells carries oxygen and contains iron?
AnswerHemoglobin
Iron in hemoglobin binds oxygen.
Expert level
Which vitamin is essential for blood clotting?
AnswerVitamin K
Vitamin K helps make clotting proteins.
Which of these vitamins is fat-soluble?
AnswerVitamin A
Vitamins A, D, E and K are fat-soluble.
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