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Takeaway Salt Labels Often Understate Sodium, New Lab Study Finds

Laboratory testing of UK meals found wide sodium variability that undermines precise menu labeling.

Overview

  • Published January 21, 2026 in PLOS One, researchers analyzed 39 meals from 23 Reading outlets using ICP-MS to verify sodium content.
  • Of labeled items, 47% contained more salt than menus declared.
  • Several single portions surpassed the UK adult guideline of 6 g of salt per day, with pasta dishes averaging 7.2 g and one reaching 11.2 g.
  • Sodium levels varied by dish: meat pizzas had the highest concentration at 1.6 g per 100 g, curries ranged from 2.3 to 9.4 g per dish, and fish-and-chip shop chips were low because salt is added after cooking on request.
  • The authors advise treating menu figures as rough guides and highlight implications for consumer advice and nutrition research given salt’s established health risks.