How to say "malnutrition" in Japanese

• 栄養失調えいようしっちょうCommon
  no-adjectiveThe most common word for malnutrition. It covers the general condition of being malnourished, whether from inadequate or unbalanced nourishment, as in discussions of famine, illness, or child health.
• 栄養不足えいようぶそく
  no-adjectiveCovers malnutrition viewed specifically as a shortage of nutrition — not getting enough nutrients. Used for inadequate diets or insufficient intake, but it is less common than 栄養失調.
  過労かろうやら栄養えいよう不足ふそくやらで彼かれは重病じゅうびょうになった。↗

  What with overwork and lack of nourishment, he became very ill.
• 栄養不良えいようふりょう
  no-adjectiveAlso means malnutrition or malnourishment, with an emphasis on poor nutritional condition. A close synonym of the words above, though less common in everyday use.
• 低栄養ていえいよう
  no-adjectiveA technical term best for undernutrition or undernourishment — nutrition falling below required levels. It is listed as also meaning malnutrition, but its primary use is in medical and health contexts.

Use 栄養失調 for malnutrition generally; 栄養不足 emphasizes insufficient nutrition, 栄養不良 is a close synonym covering malnourishment, and 低栄養 is a technical term leaning toward undernutrition.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 栄養失調えいようしっちょうmalnutrition
• 栄養不足えいようぶそくmalnutrition
• 栄養不良えいようふりょうmalnutrition
• 低栄養ていえいようundernutrition