Guides
Food Photo Nutrition Guides
Plain-spoken guides to logging meals from photos: how AI calorie estimates work, where they go wrong, and how to get numbers you can trust.
Food photo nutrition tracking: how it works, how accurate it is, and how to use it wellHow a food photo nutrition tracker turns a picture into calories and macros, how accurate it is, how to get better numbers, and how to choose an app.How accurate are photo calorie apps?How accurate are photo calorie apps? What the 2026 NIH-linked test, peer-reviewed studies and manual-logging research show, and how to get better numbers.Why do AI food photo apps underestimate calories?Why AI food photo apps underestimate calories: hidden oils and sauces, portion depth, mixed dishes and cuisine gaps. What the research shows and how to fix it.Photo food logging vs manual calorie countingPhoto food logging vs manual calorie counting: which is faster, which is more accurate, and when to use photo, barcode, text or a kitchen scale.Can ChatGPT or Gemini count calories from a photo?Can ChatGPT or Gemini count calories from a food photo? What a peer-reviewed test found, where chatbots fall short, and when a dedicated tracker helps.How to take food photos for accurate calorie trackingHow to take food photos for accurate calorie tracking: angle, light, framing, scale, hidden fats, and when a barcode beats a photo.How to estimate portion sizes without a scaleEstimate portion sizes without a scale using your hand, everyday objects, cup and spoon conversions, and the plate method, then adjust your log.How to count calories when eating out: 7 practical tipsHow to count calories at restaurants: use chain menu labels, photograph or describe your plate, allow for added fats, and handle shared dishes and drinks.