Trying to Lose Weight by Cutting Out Carbs and Eating Only Fruits and Vegetables? You May Be Getting It Wrong from the Start

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When it comes to eating for fat loss, there’s one approach that seems almost impossible to get wrong:

Remove the rice, double the vegetables, and fill up on fruit instead.

With fewer staple foods and more fruits and vegetables, the whole meal may look much “healthier” than before.

But fat loss isn’t simply a matter of swapping one food for another.

Fruits and vegetables can certainly be important parts of a healthy diet. But if you simply remove staple foods without considering how much fruit you’re eating, how your vegetables are prepared, what other foods you’re pairing them with, and what you eat throughout the entire day, this substitution may not address the real issue.

So instead of only asking, “Can fruits and vegetables replace staple foods?”, a more useful question is: What actually happens to your diet after you reduce staple foods?

1. Why Doesn’t Eating Fewer Staple Foods Necessarily Mean You’re Eating Better?

When many people start trying to lose fat, the first adjustment they make is reducing rice, noodles, and bread—or even removing staple foods from a meal entirely.

But whether a meal is more suitable for fat loss cannot be judged simply by whether it contains staple foods.

After reducing staple foods, you also need to look at what happens to everything else. Are you eating more fruit? If you don’t feel full after a meal, are you eating more snacks, drinking more beverages, or adding other foods later? What really matters is whether your overall diet throughout the day has become more balanced as a result.

A systematic review published in the Journal of the Academy of Nutrition and Dietetics found that, among adults, reducing the overall energy density of the diet was associated with better outcomes for weight loss and weight maintenance.

The key point isn’t “which food should you eliminate?” but rather how your overall dietary pattern changes.

What really needs to change for fat loss is your overall diet—not simply removing staple foods.

2. Fruits and Vegetables Are Healthy, but How You Eat Them Still Matters

2.1 Fruit Can Add Variety, but More Isn’t Always Better

Fruit can be part of your daily diet, but there’s no need to replace large amounts of your usual staple foods with fruit simply because you’re trying to lose fat.

When fruit goes from a small part of a meal to a large portion—or even replaces an entire meal—you can’t just focus on whether “it’s fruit.” You also need to consider how much you’re actually eating and how the rest of your food is arranged throughout the day.

Fruit is worth eating, but “healthy” doesn’t mean portion size no longer matters.

2.2 How Vegetables Are Prepared Can Also Change the Meal

Eating more vegetables is usually a useful adjustment, but steamed, boiled, and quickly stir-fried vegetables are not exactly the same as vegetables prepared with larger amounts of oil and sauces.

This doesn’t mean you can only eat boiled vegetables while trying to lose fat. It simply means that in addition to asking “how many vegetables did I eat?”, you should also consider how those vegetables were prepared.

Eating more vegetables matters, but so does the way you cook them.

2.3 Eating Only Fruits and Vegetables Doesn’t Make a Diet More Balanced

Fruits and vegetables can provide a variety of vitamins, minerals, and dietary fiber, but they cannot replace every type of food.

If trying to lose fat means not only removing staple foods but also eating less meat, eggs, dairy, beans, and other foods, your diet may actually become more limited.

The goal isn’t to make your diet smaller and smaller. It’s to create a more balanced combination of different types of foods.

3. Fat Loss Doesn’t Mean Removing Staple Foods From Your Diet

3.1 A Regular Dinner Should Be Considered as a Whole

Trying to lose fat doesn’t mean the less staple food you eat at each meal, the better. Rice, noodles, and other staple foods can still remain in your diet. What really matters is the overall balance between staple foods, protein-rich foods, and vegetables.

If a meal consists mostly of rice or noodles with very few vegetables and protein-rich foods, you can adjust the proportions of different foods. But if your meal already includes staple foods, fish, meat, eggs, beans, and vegetables, there’s no need to completely remove the staple food first just because you’re trying to lose fat.

Instead of making a rule that “you can’t eat rice for dinner,” focus on whether the meal is more balanced and whether this way of eating is something you can maintain long term.

3.2 Starchy Foods Should Be Considered Together With Other Staple Foods

Potatoes, Chinese yams, and taro are often treated as “vegetables,” but they are not exactly the same as non-starchy vegetables such as spinach, broccoli, and lettuce.

These foods have a relatively higher starch content, so it makes more sense to consider them together with staple foods such as rice, noodles, and bread rather than simply counting them as “another serving of vegetables.”

If you’ve already eaten a larger portion of potatoes, Chinese yams, or taro, you can adjust the amount of other staple foods accordingly. If you’re only eating a small amount, there’s no need to completely eliminate other staple foods because of it.

The key isn’t to remove them, but to consider starchy vegetables together with your other staple foods.

3.3 Exercising at Night Doesn’t Mean You Need to Deliberately Eat Less

Having an evening workout planned doesn’t mean you need to intentionally reduce your dinner, nor do you need to skip staple foods to get “better fat-loss results.”

What really needs to be adjusted is your dinner portion, meal timing, and the intensity of the exercise that follows. Easy walking, incline walking, and running place different demands on the body. The more you eat and the more intense your workout is, the more you need to consider digestion time and how your body feels.

The key isn’t to “eat less” because you’re exercising. It’s to coordinate your meal timing with your training schedule.

4. Beyond a Single Meal, What Matters More Is How You Eat Throughout the Day

Adjusting one dinner is only the beginning. What really shapes your long-term eating habits is how different foods and meal times fit together throughout the day.

If you regularly skip meals during the day, rely on snacks in the afternoon, and then deliberately eat less at dinner because you’re trying to lose fat, removing staple foods from dinner still doesn’t truly improve your overall dietary pattern.

Fruit, snacks, sugary drinks, and the oils and sauces used in cooking are all part of your daily diet as well.

So instead of worrying about “whether you can eat rice at this meal,” it’s more useful to focus on whether your meals are regular, whether you eat a variety of foods, and whether your overall diet is balanced.

5. Combine Diet and Exercise for a More Scientific Approach to Weight Loss

In addition to adjusting your diet, exercise can begin at a level that matches your current fitness instead of immediately chasing high intensity.

For a 150 lb (approximately 68 kg) adult, based on the reference MET values from the 2024 Adult Compendium of Physical Activities, walking on a treadmill at 3.0–3.4 MPH on a flat surface is approximately 3.8 METs, brisk walking at 3.5–3.9 MPH is approximately 4.8 METs, and jogging at 5.0–5.5 MPH is approximately 8.3 METs. As a rough estimate, 30 minutes would burn approximately 130 kcal, 160 kcal, and 280 kcal, respectively. These figures are only intended to illustrate the differences between exercise intensities; actual energy expenditure will vary from person to person.

Incline provides another way to increase workout difficulty. You can start with flat walking, progress to brisk walking once you’ve adapted, add incline if you’re not ready to run yet, and gradually move into jogging and running after building a stronger fitness base.

The DeerRun Z10 Pro offers a 0.6–7.5 MPH speed range that covers easy walking, brisk walking, jogging, and running, along with 12 levels of automatic incline adjustment, up to approximately 12%. Speed gives you room to progress from walking to running, while incline gives you another way to increase workout difficulty without simply “going faster.”

If you’re unsure when to increase your speed, introduce incline, or structure your weekly workouts, PitPat AI Coach can also provide training-plan support based on your goals and progress, helping your exercise routine gradually become more structured.

Weight loss doesn’t require choosing between the extremes of “eating less” and “exercising as hard as possible.”

Fruits and vegetables are worth eating, and staple foods don’t need to automatically disappear just because you’re trying to lose fat. Exercise also shouldn’t become a way to “compensate for calories” after eating a meal.

Instead of eliminating one particular food, it’s more worthwhile to build long-term, balanced eating habits and combine them with exercise that matches your fitness level and current stage of training.