KnowraEssential amino acidLinked fromLinked fromThe 24 pages that link to Essential amino acid, each with the reason it gives.All 24Broader topic 5Related 5Narrower topic 7Compared with 7TyrosineRelated: Tyrosine is usually nonessential, but becomes conditionally essential when phenylalanine metabolism is impaired.LysineRelated: Lysine is essential in humans because dietary intake must supply it.Proteinogenic amino acidRelated: Several proteinogenic amino acids are essential in humans, linking protein composition to nutrition.LeucineRelated: Leucine is essential because human metabolism cannot make enough to meet needs.IsoleucineRelated: Human cells cannot make enough isoleucine to meet physiological needs.