B2noun2K

Protein

UK /["/ˈprəʊtiːn/"]/US /["/ˈprəʊtiːn/"]/

Definition

a substance, found within all living things, that forms the structure of muscles, organs, etc. There are many different proteins and they are an essential part of what humans and animals eat to help them grow and stay healthy.

In simple words: A type of nutrient that helps build and repair the body.

Examples

essential proteins and vitamins
protein deficiency
Peas, beans and lentils are a good source of vegetable protein.
Gluten is a protein found in wheat and other grains.

Usage notes

Used in both everyday conversation and scientific contexts. Often discussed in relation to diet and health. Less common in casual speech unless related to fitness or nutrition.

Grammar pattern

standalone noun

Memory hint

Remember 'protein' by thinking of 'pro-tein' as a 'pro' helper for your muscles.

Collocations

essential
natural
animal
contain
supply
be high in
be found in something
content
level
intake
a source of protein

Synonyms

nutrient
amino acid
muscle builder
meat
protein source

Antonyms

carbohydrate
lipid
fat

Common mistakes

Confused with 'proteins' as a countable noun, when 'protein' is often used as an uncountable noun.
Incorrectly describing 'protein' in singular when discussing multiple types.
Mixing up 'protein' with other nutrients like 'carbohydrates' and 'fats'.