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From 2 episodes

Are AI photo food tracking apps accurate?

Answered by Nikkiey Stott and her guests · Updated

The short answer

No, not in Nikkiey's testing. When she tried Cal AI, it logged about 12 grams of protein for a five-ounce chicken breast she knows has at least 30, and undercounted her usual breakfast and yogurt too. A photo can't see oil, portion size, or sauces, so she recommends weighing food and logging it in MyFitnessPal.

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  1. Nikkiey on what a food photo can't see: oil, portions, sauces and density

    Plays from 8:55 · Ep. 282: Can You Trust Your Fitness Tracker's Calorie Burn?

  2. Nikkiey tests Cal AI on the breakfast she's eaten for two and a half years

    Plays from 7:51 · Ep. 282: Can You Trust Your Fitness Tracker's Calorie Burn?

  3. Nikkiey's five-day Cal AI trial and the chicken breast it got badly wrong

    Plays from 23:51 · Ep. 281: Why Am I Lifting Weights But Not Seeing Muscle?

  4. Why Nikkiey says to track protein in MyFitnessPal with barcodes and weighed food

    Plays from 25:54 · Ep. 281: Why Am I Lifting Weights But Not Seeing Muscle?

The full answer

Nikkiey tried Cal AI after a room full of people at a conference downloaded it and called it the future of food tracking. On Ep. 281 she describes using it for about five days, and on Ep. 282 she says about a week. Either way, the results didn't hold up. She has eaten the same breakfast for roughly two and a half years, so she knows its macros. The app said her egg whites, whole egg and oatmeal or bagel came to 12 grams of protein. It put her yogurt and fruit at 16 grams when she knows it has 22 to 25.

She explains that the problem is what a photo simply can't see:

  • how much oil went into cooking the meal
  • whether that's four ounces of chicken or six
  • whether rice is cooked, dry, or half hidden under sauce
  • food density, moisture, and sauces mixed in

As she puts it, that means you're not tracking, you're pretending. On Ep. 281 she adds that many people take the app's numbers at face value because they haven't spent time weighing food and learning what five ounces of chicken or half a cup of oatmeal actually looks like. With that kind of error, she says, you're either under eating or overeating, and three to six months later you see some progress but not the progress you could have had.

That's the part that matters most. If the numbers going in are wrong, a stall isn't proof you failed. You never had the right data to begin with. Nikkiey's recommendation is to stick with MyFitnessPal, where you can scan barcodes and enter food you've weighed, and to check yourself against one clear question: are you hitting your protein target?

From Nikkiey Stott and WarriorBabe's coaching. For education, not medical advice: talk to your doctor about your own health.

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