Objective: Consumers in the US make choices within a food supply dominated by processed packaged foods and beverage products. Front-of-package nutrition labels (FOPL) equip consumers to make healthier choices, but further evaluation and regulation regarding FOPL format, scope, and display have been recommended by the World Health Organization. As a leader in consumer FOPL guidance, the American Heart Association's (AHA) Heart Check programme certifies food companies seeking to add an AHA Heart Check logo as a FOPL for qualifying heart healthy products. A cross-sectional assessment of the AHA Heart Check Standard Certification was conducted within the US packaged food and beverage supply to assess the eligibility and prevalence of the programme as a FOPL. Methods: Data were derived from Label Insight's Open Data initiative, which is the largest publicly-available US branded food composition database. The proportions of products that were certified and eligible to be certified for the Standard Certification were reported by nutrient attributes, grocery aisles and food brands. Results: Among 153,453 products examined, fewer than 1% exhibited the Heart Check certification on their label. Among products that were not Heart Check certified,13.8% were eligible for Standard Certification. The most common reason for ineligibility was the saturated fat content (52%), followed by total fat content (47%) and sodium content (47%). Heart Check certification and eligibility differed substantially across grocery aisle categories. Conclusions: The abundance of unhealthy products in the US packaged food and beverage supply and absence of harmonized FOPL policies suggest the need for FOPL like the Heart Check label to promote adherence to healthy diets. There are opportunities for food manufacturers and the AHA to certify more heart healthy foods and beverages. However, more consistent criteria and transparent labelling could enhance Heart Check certification to facilitate consumers' ability to make more informed and healthful purchases.