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 7CysteineCompared with: Cysteine is generally conditionally essential rather than strictly essential when methionine supply is adequate.Glutamic acidCompared with: Glutamic acid is nonessential, unlike amino acids that require dietary supply.SerineCompared with: Serine is usually nonessential, unlike amino acids in this nutritional class.AlanineCompared with: Alanine is nonessential because the body can make it from pyruvate.Aspartic acidCompared with: Aspartic acid contrasts with this dietary category because humans can synthesize it.GlutamineCompared with: Glutamine is ordinarily nonessential, though demand can exceed synthesis during some stresses.Hartnup diseaseCompared with: Tryptophan is essential, so impaired uptake cannot be offset by human synthesis.