Usage Note
Proteína is typically used in the plural (proteínas) when discussing dietary intake: alimentos ricos en proteínas ('protein-rich foods'). The accent on the i signals a hiatus — the e and i are separate syllables, not a diphthong. In colloquial gym or nutrition talk, proteína (singular) often refers informally to a protein supplement or shake.
Examples
"La carne es rica en proteínas."
Natural Translation
Meat is rich in proteins.
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