Level 0: Thin is appropriate for individuals who can consume liquids with the texture of plain water. Foods at this level flow quickly, and can be drunk from a cup, spoon, or straw easily. Foods are tested using the Flow Test at this level.

The IDDSI Flow Test is a standardized test for determining the level of a liquid sample. You must have a 10ml syringe for this test, and not all syringes are created equal. Hold a ruler up to your syringe and the distance from the very bottom line to the 10ml mark must measure 61.5 mm. We recommend watching IDDSI’s Youtube video of the Flow Test as well as this comparison between Levels 1-3 before you cook as well as during the testing of your final modified portion.

Always test your food before serving to ensure that it meets all the IDDSI testing guidelines.