MyFitnessPal has become one of the most popular tools for weight loss, helping millions of people track their food and calories to reach their goals. Spring is here, and with summer just around the corner, it’s the time of year when many people start thinking about weight loss. The warmer weather, lighter clothes, and the thought of beach days often bring a renewed motivation to “get healthy” or “shed a few kilos.” Unfortunately, this is also the season when quick-fix diets and unsustainable trends make a big comeback.
Instead of jumping into something extreme, many people look for tools to guide their eating habits, and one of the most popular options is MyFitnessPal. This food-logging app has been downloaded over 200 million times, and it promises to help you become more mindful of your intake and track your progress toward weight loss.
But is it really the magic solution people are hoping for as summer approaches?
Or are there downsides that could hold you back? Let’s dive into the pros and cons of MyFitnessPal for weight loss so you can decide if it’s the right fit for you.
The Pros of MyFitnessPal for weight loss
Awareness of What You’re Eating
This is probably my favourite thing about my fitness pal. Many people underestimate their calorie intake. Logging meals helps flag portion sizes, hidden calories, and overall nutrient balance. Simply tracking for a few weeks can be eye-opening, showing patterns you may not have noticed before—like how quickly snacks add up, or how often protein is missing from meals.
Large Food Database
MyFitnessPal has one of the biggest food databases of any app, including popular brands and restaurant meals. The barcode scanner makes packaged food entry quick and convenient, which helps people stick with it.
Customisable Goals
The app lets you adjust calorie and macronutrient targets based on your goals—weight loss, maintenance, or muscle gain. For some, having a clear daily target helps bring structure and accountability. However it may be worth having a chat with myself to distinguish what macronutrients are best suited to reach your goals.
Motivation and Progress Tracking
Features like streaks, daily reminders, and weight-tracking graphs can keep you motivated. For some, simply knowing they’ll have to log a food choice can encourage more mindful decisions.
The Cons of MyFitnessPal for weight loss
Calorie Recommendations Aren’t Always Accurate
This is one of the biggest pitfalls of MyFitnessPal—and one that doesn’t get talked about enough.
MFP uses the Mifflin-St. Jeor equation to estimate your basal metabolic rate (BMR). As far as predictive formulas go, it’s a decent one, and often fairly close to measured values. But it tends to underestimate needs, and even being off by 10% can make a big difference. That might not sound like much, but when most people panic if they go slightly over their calories for the day, this margin of error can be very discouraging—or even harmful.
As a nutritionist, I was trained to use formulas like this as a starting point, not a strict rule. In contrast, most people using MyFitnessPal see their daily calorie goal as a hard cap, and sometimes even try to “beat” it by eating less. Rarely do people stop to think: what if I actually need more than what the app recommends.
In reality, no formula can exactly capture an individual’s unique energy needs. Two people of the same age, height, weight, and activity level might need very different amounts of food because of factors like:
- Body composition – Muscle is more metabolically active than fat, so leaner people often require more energy.
- Diet history – People with a long history of dieting often have slower metabolisms.
- Medications – Certain drugs can raise or lower energy needs.
- Genetics – Your DNA plays a role in how your body processes energy.
- Microbiome – The gut microbiome can influence how quickly food is absorbed.
- Medical history – Illnesses or conditions can increase or decrease calorie requirements.
This is why calorie recommendations from MyFitnessPal (or any app) should be taken with a grain of salt. They’re an estimate—not the be all and end all.
Focus on Numbers, Not Nutrition Quality
MFP makes it easy to hit calorie targets while eating mostly processed foods. The app does little to encourage food quality, which is just as important for health and weight loss as calorie balance. This is why a great nutritionist comes in handy!!
Inaccuracies in the Database
Because many food entries are user-generated, errors are common. This can make it confusing if you’re trying to log accurately and don’t know which entry to trust.
Risk of Obsession
For some, logging every bite can become time-consuming or even obsessive. Missing a day might feel like failure, which isn’t a healthy mindset to build around food. I would always encourage using it for a while as a guide and to understand what you are eating and then putting what you learned into practice.
Exercise Calories Can Be Misleading
The app often overestimates calories burned through exercise. I would recommended not linking exercise with my fitness pal as when creating the formula I like to include the activity levels that people currently do.
Not Always Sustainable Long-Term
Food logging can be an excellent short-term learning tool, but many people don’t find it enjoyable or sustainable long-term. As noted, it may be better to use it to build awareness, then transition to more intuitive approaches like portioning with your plate or mindful eating.
My Take as a Nutritionist
MyFitnessPal can be a fantastic educational tool for short-term use. It helps you become more aware of portion sizes, calorie balance, and where your diet might need adjusting. But it’s not perfect—and it’s not for everyone.
If you find yourself getting stressed, discouraged, or overly focused on the numbers, it may not be the best fit. Remember: weight loss and health are about more than calories. The quality of your food, your daily habits, your relationship with eating, and your overall lifestyle matter just as much—if not more—than hitting a number in an app. If you would like more individualised help with this book a nutrition consult with me by emailing sarah@authenticpt.com.au.
MyFitnessPal for weight loss in summary
Think of MyFitnessPal as a training tool, not a forever solution. Use it to build awareness and accountability, but don’t feel chained to it. And always keep in mind: those calorie targets are only an estimate. Your body’s needs are unique, and no app can capture the full picture.
At the end of the day, the most sustainable weight loss strategies focus on balanced meals, enjoyable activity, and building healthy habits—not just chasing numbers on a screen.
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