乳酸菌

1. Origins, structure, and basic meaning

• Structure: Spelling: 乳酸菌. Reading: にゅうさんきん. Core meaning: lactic acid bacteria.
• Basic usage: Representative examples: 理科の教材で乳酸菌の写真を見た / 容器の表示に乳酸菌という文字があった.

2. Common pitfalls and similar expressions

• Bacteria versus acid
  • 乳酸菌 refers to bacteria that produce lactic acid. Distinguish the organisms from 乳酸, lactic acid as a substance.