List of Free Open Food Databases

• https://world.openfoodfacts.org (EU market)
• https://ndb.nal.usda.gov/ndb/search/list?home=true (USA market)
• https://www.foodrepo.org (for the Swiss market)
• https://spoonacular.com/food-api Seems to rely on usda.gov database, and is a freemium API.
• https://product-open-data.com
• https://platform.fatsecret.com/api/Default.aspx?screen=prem (basic limited free plan).