Maximum Tolerable Level (MTL)

  • Assessment
  • Implementation
  • Planning
  • Diet
  • Fortification
  • Supplementation


The maximum micronutrient content that a fortified food can present as it is established in food law, in order to minimize the risk of excessive intake. It should coincide or be lower than the safety limit.


WHO and FAO (2006). Guidelines on food fortification with micronutrients, World Health Organization.