- HEI-2020
- Healthy Eating Index 2020, a 0-100 USDA score for diet quality. American average is 58.
- AIP
- Autoimmune Protocol diet, an elimination diet used for autoimmune conditions; tracks staged reintroductions.
- NOVA
- A four-tier food classification system measuring how processed a food is. NOVA 4 is ultra-processed.
- NutriScore
- An EU 5-tier nutrition rating (A best, E worst) blending positive and negative nutrients.
- USDA Thrifty
- USDA cost benchmark for a low-cost food plan. $231/wk for a family of 4 (2026).
- Inflammation score
- A 21-point scale from -10 (most anti-inflammatory) to +10 (most pro-inflammatory).