Science & Research
Discover the science behind the Guiding Stars nutrition guidance
system, and the independent research that powers every rating.
Science Behind The Stars
Behind every Star rating is a rigorous evaluation derived from the latest evidence-based nutrition science and informed by expert review.
Our Algorithms
Learn the criteria used to evaluate foods and beverages and assign Star ratings.
Research Library
As nutrition advocates, we recognize the importance of how Guiding Stars performs in independently funded research published in peer-reviewed journals.
Scientific Advisory Panel
Meet the nutrition and public health experts behind our patented algorithms.
Our Ratings System
TOTAL SCORE
MOST NUTRIENT-DENSE
MORE NUTRIENT-DENSE
POSITIVE OUTWEIGH NEGATIVES
EQUAL POSITIVES & NEGATIVES
NEGATIVES OUTWEIGH POSITIVES
LESS NUTRIENT-DENSE
LEAST NUTRIENT-DENSE
STAR RATING
Breakdown of Total Scores Example
Based on ingredients, General Foods Algorithm is selected
Nutrition Facts are standardized to 100 calories
Credits and Debits assigned per algorithm based on ingredients, scaled nutrition facts & on-pack claims
Credits + Debits =
Total Score
Total Score determines Star rating based on algorithm
More
Fiber
Vitamins & Minerals
Whole Grains
Less
Additives to Limit
Added Sodium
Added Sugar
Policy & Public Health
How Guiding Stars aligns with public health goals and dietary guidelines from leading health organizations. Supporting institutional and policy-level decision making.
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WEEKLY • EVIDENCE-BASED • NO PROMOTIONS