食盐 (shí yán) literally means 'food salt' — 食 (shí) means 'to eat' or 'food', and 盐 (yán) means 'salt'. Together, they refer specifically to refined, edible table salt — the common white crystalline condiment used for seasoning and food preservation. Unlike the broader term 盐 (yán), which can refer to any chemical salt (e.g., Epsom salt or sea salt in non-culinary contexts), 食盐 emphasizes safety and suitability for human consumption, often implying it has been iodized and meets national food standards.

This word is widely used in health education, nutrition labels, cooking instructions, and public health campaigns in China. You’ll see it on packaging (e.g., 碘盐 is a type of 食盐), in dietary guidelines advising limited intake, and in everyday conversation when discussing cooking or health. It carries a neutral, standard register — appropriate in both spoken and written Chinese, but slightly more formal than simply saying 盐 in casual speech.