Learn
Plain-English guides to reading restaurant health inspections and understanding food recalls — the same explanations that power the Radius app.
Do restaurant grades actually predict food safety?
What a letter grade, score, or pass/fail result can and can't tell you about whether you'll get sick — and how to read them honestly.
The big 9 food allergens and undeclared-allergen recalls
The nine major allergens U.S. law requires on labels, and why undeclared allergens are one of the most common recall reasons.
FDA vs. USDA recalls: who recalls what?
The FDA and USDA FSIS regulate different foods. Here's how the split works and why Radius merges both into one recall feed.
Food recall classes explained: Class I, II, and III
What the FDA and USDA's Class I, II, and III recall levels mean, from most to least serious, in plain English.
What is a critical health-inspection violation?
Critical vs. non-critical violations, what inspectors mean by each, and how to read them when you check a restaurant.