Policy Research for Front of Package Nutrition Labeling: Developing and Testing a Summary System Algorithm. 4.1.2 Modifications to the Baseline Algorithm

05/01/2011

We tested a series of modifications to the baseline algorithm that included (1) calculating the score using nutrient values on a per RACC basis instead of per 100 kcal basis, (2) removing unsaturated fat from the algorithm, (3) removing added sugars, (4) adding individual positive nutrients (magnesium, vitamin A, vitamin C, folate, and vitamin B12), and (5) adding the percentage of total grains that are whole grains. After examining the results of the modifications, we tested an additional modified algorithm with vitamin C and whole grains. As the algorithms were modified to include or exclude nutrients/components, the divisor was changed to adjust to the new numbers of positive or negative nutrients. We calculated all modified algorithms on a per 100 kcal and RACC basis. The modified algorithms or NDSs are presented in Figure 4-1.

Figure 4-1. Baseline and Modified Nutrient Density-Based Algorithms Tested

NDS1 Baseline with unit basis test (Protein g per unita/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44) * 100/8
− (Saturated fat g per unit/20 + Added sugars g per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS2 Remove unsaturated fat (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500) * 100/7
− (Saturated fat g per unit/20 + Added sugars g per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS3 Remove added sugars (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44) * 100/8
− (Saturated fat g per unit/20 + Sodium mg per unit/2,400) * 100/2
NDS4M Add magnesium (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44 + Magnesium mg per unit/400) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS4A Add vitamin A (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44 + Vitamin A RAE mcg per unit/1,500) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS4C Add vitamin C (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44 + Vitamin C mg per unit/60) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS4F Add folate (Protein g per unit /50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3500 + Unsaturated fat g per unit/44 + Folate mcg per unit/400) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS4B12 Add vitamin B12 (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3500 + Unsaturated fat g per unit/44 + Vitamin B12 mcg per unit/6) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
NDS5 Add whole grains (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44 + [Whole grains g per unit/Total grains g per unit/0.5]) * 100/9
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2400) * 100/3
NDS6 Add vitamin C and whole grains (Protein g per unit/50 + Fiber g per unit/25 + Vitamin E IU per unit/30 + Vitamin D IU per unit/400 + Calcium mg per unit/1,000 + Iron mg per unit/18 + Potassium mg per unit/3,500 + Unsaturated fat g per unit/44 + Vitamin C mg per unit/60 + [Whole grains g per unit/Total grains g per unit/0.5]) * 100/10
− (Saturated fat g per unit/20 + Added sugars mg per unit/50 + Sodium mg per unit/2,400) * 100/3
a All algorithm modifications were tested with both unit bases - per 100 kcal and per RACC. Positive nutrients were capped at 100% of recommended intake.