Any threshold system could be modified using different nutrients, thresholds, or food categories. Many threshold systems use the FDA criteria for a "healthy" claim and these criteria could be a starting point for developing a new threshold system. Most threshold systems assign food category-specific criteria, which adds complexity to the system's design and there is no solid evidence base for these criteria.
Using a threshold system with categories, potential concepts to test include the following:
- nutrients (e.g., modifications to the FDA "healthy" claim nutrients - exclude total fat and cholesterol; include a fat-quality indicator; with or without added sugars; include additional nutrients of interest)
- positive vs. negative nutrients (e.g., include both or only negative nutrients)
- weighting (e.g., assigning more weight to negative nutrients than positive nutrients)
- use of food category-specific nutrient criteria instead of across-the-board criteria (one set of criteria)