Why Am I Not Losing Weight? A List of Common Weight Loss Obstacles

asian woman holding up a scale in frustration at not losing weight

Why Am I Not Losing Weight? A List of Common Weight Loss Obstacles

By: Julie Mancuso, founder of JM Nutrition and the JM Nutrition Team


In this post:

  • answer to the question “Why am I not losing weight?”

  • a look at common weight loss obstacles


Over the years we have come to realize that there are numerous weight loss obstacles and not being able to lose weight can be incredibly frustrating.

Avoiding weight gain: a part-time job

For some people weight loss comes easy. These people eat what they want, whenever they want and in whatever quantities they want—and still, they don’t gain any weight. Well, these people should count themselves lucky because the rest of us face a number of weight loss obstacles. Essentially, avoiding weight gain becomes a part-time job, and precisely the reason why many people enter a weight loss program with dietitians.

In addition to battling weight gain, many people have a difficult time dropping a few pounds when it appears that they are doing what they should be doing to lose weight: exercising, eating healthy foods and avoiding junk food. Being unable to lose weight is frustrating, leaving people discouraged and devoid of hope.


Weight loss factors

Losing weight, however, can be a complicated matter, especially for some people. Other weight loss factors have to be taken into serious consideration when trying to reach a weight loss goal. Just like in other aspects of life, to some, certain things come easily, whereas others need to sweat a little more to achieve the same results.

But if we take a closer look at weight loss, we can identify common weight loss obstacles that get in the way.


Why Am I Not Losing Weight? A List of Common Weight Loss Obstacles


Weight loss obstacle 1: Thinking that exercise is the saving grace, giving you a free ticket to eating what you want.


Without a doubt, exercise is crucial for our overall health and well-being. And although it surely plays an important role in the effort to maintain or lose weight, exercise alone is not enough. Just ask our sports nutrition specialists.

Of course, exceptions to this rule exist, but generally speaking, most people cannot simply rely on exercise and maintain the desired weight as they get older.

Despite the fact that exercise, particularly cardiovascular and strength training workouts, is a catalyst for weight loss, proper, well-balanced, sustained nutrition is vastly more important and will see you through in the long-term.


Nutrition outweighs exercise

Why does nutrition outweigh exercise?

For one, you cannot exercise and sweat all the harm out of unhealthy foods. Although you may not notice it right away, prolonged unhealthy eating, even with regular exercise, will likely negatively affect your body, whether inside or out.

From weight gain to digestive problems to affected sleep and mood, sustained unhealthy eating contributes to all sorts of ailments.

Two, people often underestimate the amount of food they consume, particularly the calories contained in food. At the same time, they grossly overestimate the calories burned by exercise.

Related: Diet vs. Exercise: What’s More Important?

Regular exercise, however, has many benefits, too, so don’t overlook it if you want to feel and look better.

Just remember, nutrition comes first, exercise second.


Weight loss obstacle 2: Not losing weight? Look at your food portions 

Another important weight loss obstacle is incorrect portion sizes.

From our experience, it is quite clear that most people consume food in portions that are much too large.

Here’s the kicker: this applies even to those who eat healthy.

When you eat more than you should, you effectively put in extra calories at every meal. Doing so can surely contribute to weight gain, even if you’re eating healthy food. Essentially, it’s the principle of too much of a good thing at work.

This is a matter of simple arithmetic. Much like exercise, eating healthy does not give you free rein to consume excessive amount of food, at least when you’re interested in losing weight. Calories are calories. Besides, just because a food is healthy, it doesn’t mean it’s low in calories. 

It’s very important to understand correct portion sizes of various foods. It’s something on which we focus a great deal with our clients.

As a result, the meal plans I co-create with them revolve around their food preferences and portion sizes. It is that important. In fact, it’s a key component that hinders weight loss for many people.

Related: Balanced Plate Model


Correct portion sizes tips:


  • Eat a smaller portion than usual. Wait approximately 20 minutes to see if you feel satisfied. You will often find that you feel satiated after a short wait, not needing any more food. This way you eat less, and thus, significantly reduce your caloric intake.


  • Another tip: use a smaller plate when eating. You’re simply tricking yourself to think that you still ate a full plate of food, even though the portion was significantly smaller.


Weight loss obstacle 3: Regularly eating foods with lurking unhealthy ingredients

As you are no doubt aware, many of today’s foods undergo processing. They are loaded with sugars and salts, and contain all types of unhealthy ingredients sneaked in to enhance flavour, add colour or improve taste.

For example, many condiments, dressings and sauces contain considerable amount of sugar. A tablespoon of ketchup contains 4 grams of sugar. And many of us drizzle our French fries with a good deal more than one tablespoon. 

The sugar content of most barbecue sauces is far greater than that of ketchup. Incredibly, it often contains three, four or even five times as much.

Related: The Best and Worst Condiments for Sugar Content

A little sugar here and some there accumulates quickly.   

It is, therefore, important to learn about ingredients and take the time to analyze food labels before purchasing a product at the grocery store.

Many of these additives are slipped in and concealed, so read carefully. Otherwise you risk eating ingredients that can contribute to unsuspecting weight gain or prevent you from losing weight.

Related: 20 Healthy Condiments (and 8 Unhealthy Ones)


Weight loss obstacle 4: Cumulative effect of small doses of unhealthy ingredients and foods

As described above, small amounts of unhealthy additives lay buried in all sorts of foods and consumed unknowingly by most people.

The small doses of these ingredients pile up over time. They can negatively affect health in the long-term—making it difficult to lose weight, even for those who have otherwise healthy habits.

For most people, identifying this as the root cause that prevents weight loss is difficult. Because these ingredients are found in so many of today’s foods and because their quantities are hard to gauge, they are often overlooked or go unnoticed.

So what’s the solution?

Once again, read labels diligently and avoid purchasing products that can potentially sabotage these goals. Nowadays, you can do this by watching YouTube tutorials. Just make sure you’re getting advice from credible and trusted sources.

You can also get help from a nutritionist or dietitian who can steer you in the right direction by providing an educational component. Nutritionists and dietitians can certainly help you avoid many of these weight loss obstacles. 


Weight loss obstacle 5: Falsely believing health claims

Advertising brings in billions of dollars for one simple reason: it works.

Nowhere is this more true than when it comes to food ads where it doesn’t take much for people to be influenced. After all, we all like food that tastes good, and if it’s healthy, even better.

For this reason food manufacturers place all sorts of health claims on the packaging of their products. Foods profess such things as:

  • low in fat
  • added Vitamin D
  • high in calcium
  • get your daily intake of Vitamin C
  • contains natural ingredients
  • reduced sugar and many more

This is all fine and dandy, but there’s a catch.

Discover other nutrition myths and misconceptions.


Buyer beware: don’t get fixated

The problem centres around the fact that people get so fixated on the purported health benefit that they omit to take a look at the rest of the ingredients lurking beneath the surface.

The companies who peddle these claims count on the buyer getting swayed by them. This allows them to sneak in the less desirable and frequently unhealthy additives.

Let the buyer be ware: the product you’re buying may be high in Vitamin C, leading you to believe you’re buying a healthy product. However, it can also be high in sugar, sodium, carbohydrates, trans fats—all of which can prevent you from losing weight.

It’s best to analyze the nutrition label in its entirety before making the decision to buy.

Related article from WebMD: Diet Mistakes: 6 Reasons Why You’re Not Losing Weight.


Weight loss obstacle 6: Too many carbs and not enough protein

Because our job is to analyze all aspects of food and its consumption, we often look at what people eat and how much they eat. We do this at the grocery store, restaurants and when analyzing clients’ food logs.

In doing so, one of the first things we notice is that people many people are unable to lose weight because the ratio of carbohydrates to protein is simply too high.

A number of recent studies suggest that reducing your carb intake and increasing protein can and does lead to a reduced appetite.


How many carbs should I consume?

Easy question, difficult answer.

It all depends on your gender, age, metabolism, physical activity level and a few other factors.

Related: How Many Carbohydrates Do You Need?

But if I were to offer a general guideline, it would be this: 20-60 grams of carbs per day, if you are looking to lose weight.

Again, this is subject to change and depends on a person’s individual situation and how many grams of carbs he or she is presently eating. If your goal is to lose weight a little faster, this number must be lowered to 20 to 30 grams per day. Fruits and vegetables are not included.

While cutting carbohydrates, it is equally important to increase daily protein intake at the same time. Eating more protein staves off hunger for longer and speeds up your metabolism in the long-term. This alone will lead to the ingestion of fewer carbohydrates and calories, leading to potential weight loss.

Equally important is the supplementation of your meals with good fats.


How much protein should I eat?

Once again, the answer is multi-layered.

That said, I highly recommend having a source of protein at every main meal. Each meal could range from 15-40 grams depending on gender, activity level and other factors. 


Rule of thumb

Furthermore, as a general rule of thumb, half of your dinner plate should consist of vegetables and salads, while protein and carbs make up the other half.

Unfortunately, the reality often is that carbs and protein make up as much as 80% of some people’s dinner plates. This is an astronomically high number that is certainly an obstacle to weight loss.

Here’s more information on daily protein intake.


Weight loss obstacle 7: Medical conditions

Despite the fact that you may be doing everything you possibly can to lose weight, sometimes there are other reasons why you can’t.

One of these could be an underlying medical condition, perhaps one that you don’t know about. Certain medical conditions can sabotage your resolve and prevent you from achieving your goals. This is quite discouraging, naturally.

Because people don’t often associate medical conditions with weight gain, they are one of the most difficult weight loss obstacles to overcome.

If this sounds like what you’re going through, it would be wise to seek the help of various medical practitioners to investigate the situation from all angles. Only then an effective plan, one that is tailor-made to your specific condition, can be made to help you lose weight. 


What are some medical conditions that can prevent weight loss?



  • Depression: Even a mild form of depression can lead to loss of motivation to exercise and an increased desire to binge on feel-good foods such as refined carbs and sugars, as a way of coping. In addition, many antidepressant medications are known to cause weight gain. Related: Nutritionist and dietitian for depression


  • An unhealthy, slow digestive system: It can cause irregular or infrequent bowel movements, leading to weight gain. For this reason alone, consider eating foods that help digestion and avoiding those foods that are hard to digest as the first course of action. 


  • Polycystic Ovary Syndrome (PCOS): PCOS can no doubt contribute to weight gain or difficulty losing weight. Related: PCOS Dietitian


Other medical conditions that cause weight gain exist.


Weight loss obstacle 8: Missing nutrients

Nutrient deficiency can manifest itself in a number of ways.

The lack of iron, magnesium, Vitamins C and D can suck the energy right out of you, by negatively impacting sleep, mood and the ability to fight off infections.

It’s difficult to have the energy and desire to exercise if you’re not well-rested. Similarly, it is near-impossible to have the desire to hit the gym when your mood is down. And it certainly is a challenge to want to exercise or cook a healthy meal while sick.

It is, therefore, important for your body to regularly take in all the essential nutrients to help avoid these side effects. With a strong, healthy and well-supported body you’re more likely to develop greater resistance.

This is precisely why I always encourage people, especially dieters, to ensure they are getting essential nutrients when attempting to lose weight. 

There is little point in losing weight if you’re depriving your body of vital nutrients. Doing so can rear its ugly head down the road, resulting in a variety of other ailments.

Apropos, this is one of the reasons why fad diets such as the ketogenic diet often don’t work in the long-run.

Discover more about the pros and cons of the keto diet.

Related: Nutrient deficiency and weight gain


Weight loss obstacle 9: Age

As off-putting as thinking about getting older may be, think about it we must, especially if we want to age well and live as healthily as possible.

As we age, our metabolism slows down significantly. This means it is much more of a challenge to burn off that slice of pizza or piece of cake at 45 than it was at 20.

The problem is that people tend to develop certain unhealthy eating habits in their youth. As with other learned behaviour, they continue indulging in this way well into middle age. And therein lies the problem.

What you may get away with eating at 20 years old, chances are you will not be able to do so at 45, 55, or 65. As your body ages and changes, so should your eating habits. 

To underscore the point, I should also mention that well into adulthood our physical activity levels drop as life gets busy and we prioritize parenthood and a career. When reduced exercise is thrown into the mix with a slower metabolism, the end result is weight gain.

To avoid this weight loss obstacle, adjust your eating habits. 

Related: Why people gain weight as they get older

Dietitians for senior nutrition


Weight loss obstacle 10: You diet

Come again? Dieting is a weight loss obstacle? 

But it’s true. In order to maintain a healthy weight or to lose weight, develop sustained healthy eating habits. The operative word being sustained.

That is not to say that you are not permitted to indulge in your favourite treats, here and there. I’m not suggesting this at all.

But the vast majority of food you consume must be nutritious, well-balanced and in the right portions. Fluctuating between bingeing on unhealthy food to a near-total restriction of food is highly ineffective.

When you deprive yourself of food, you are depriving yourself of certain nutrients needed by the body, as well as the general feel-good factor of food consumption.

In all likelihood, it’s a recipe for failure, and in turn, weight gain. This phenomenon is referred as yo-yo dieting and should be avoided at all costs. If you need help in this area, our dietitians who specialize in eating disorders are here to help.

Diet is temporary

Some people do experience favourable results by following fad diets such as the keto diet, especially in the initial stages, but these tend to peter out with time because they are not sustainable in the long-term and often nutritionally unbalanced.

To change eating habits permanently, behaviour changing methods must be implemented while making small, gradual reductions and healthy substitutions.

We recommend starting with meal prepping and planning to avoid impulsive, on the fly decisions.

Learn more about why people diet and popular diet reviews.

Related: Do Meal Plans Work?


Weight loss obstacle 11: Eating at the wrong time of day

Why does eating at a certain time of day matter?

Well, it’s largely because of the way the body processes food.

It is particularly important to avoid eating late in the evening. When you eat late in the evening, just before going to sleep, the body doesn’t have the opportunity to burn off the ingested calories via normal bodily functions. Instead, it stores them as fat while you are sleeping. This naturally leads to fewer burned calories and more weight gain or difficulty losing weight.

Eat your meals, preferably small, a couple of hours before going to sleep to ensure proper metabolization. 


Weight loss obstacle 12: Alcohol consumption

Why does alcohol pose an obstacle to weight loss?

Alcohol is highly caloric, pure and simple.

In fact, alcohol contains approximately 7 calories per gram, while carbs and protein carry only 4 calories per gram. Only fat has a higher calorie-per-gram content (9 calories/gram).

When you add mixers, creams or soda to many drinks, the caloric vale skyrockets. 

For a more in-depth look at alcohol and weight loss read: 

Alcohol Selections For Weight Loss

Without a doubt, alcohol often greatly contributes to the difficulty in losing weight.


Weight loss obstacle 13: Not drinking enough water

Drinking adequate amounts of water can help with weight loss in a number of ways.

One, if you’re sipping on water all day, you’re less likely to reach for that can of soda. This effectively reduces exposure to such temptations.

Two, thirst is sometimes mistaken for hunger. In other words, when you’re thirsty, you may mistakenly think you’re hungry. This may lead to eating rather than drinking and quenching thirst. Doing so throughout the day, every day, can lead to eating when you don’t need to.

Furthermore, drinking water benefits our health in numerous ways, so it should be a priority.


Weight loss obstacle 14: Know the difference between cravings and hunger

Not knowing the difference between a craving and actual hunger can pose an obstacle to weight loss.

Once you’re aware that it is one, not the other, you can implement certain strategies that redirect you from habitually unhealthy impulses to healthier ones.

In a nutshell, here’s the difference between the two: 


  • sudden
  • temporary
  • mental (response to a situation, often a negative one)
  • involves immediate satisfaction, often followed by guilt
  • only certain foods will satisfy 


  • gradual
  • permanent
  • physiological (response to a need: growling stomach, lightheadedness)
  • involves replenishment and satiety, followed by satisfaction
  • any food will satisfy

An example of a strategy you can try when faced with a craving is to wait for the craving to pass instead of giving in. Cravings last only a few minutes, so if you get through this short time, you should be able to resist it.

You can supplement this strategy with distracting yourself when the craving kicks in. You can leave the room, call someone, do yoga, take the dog for a walk–anything to redirect yourself from the urge.

Related: Emotional Eating: Causes And How To Stop It


Weight loss obstacle 15: Stress and mental health

There are many reasons why we regularly give in to the temptation of reaching for unhealthy foods.


Growing levels of stress create a strong need for indulgence and relaxation. Sometimes the most readily available, or the only, way to destress is through eating a sugary, salty or fatty snack, receiving immediate relief.

Doing so it’s much easier than going to the gym or meditating. Because we tend to follow the path of least resistance, we take a walk over to the pantry and grab an unhealthy snack where we find immediate gratification.

Discover how to reduce stress with diet and supplementation.

Mental health

Mental health plays a similar role. Sadness, frustration, anger and anxiety all play a role in unhealthy food overindulgences.

Rather than dealing with the root cause of how we feel, which can be challenging and prolonged, it’s much simpler to reach for a sugary, salty or fatty snack and receive a temporary form of relief.

It is, therefore, important to be self-aware and mindful of our behaviour patterns, applying strategies that help us cope.

Related: Mental health dietitian



If you’re baffled as to why you are not losing weight, even though it seems that you are doing everything within your power to do so, I strongly suggest to closely look at each one of the weight loss obstacles above. Observe and gauge if any of them may contribute to the difficulty in losing weight. This takes time, and a good deal of trial and error. But it could be worth it in the long run.

If you require assistance from our weight loss dietitians and nutritionists, contact us or book a free consultation.


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JM Nutrition provides nutritional counselling by dietitian and nutritionist in Toronto, dietitian in Mississauga, dietitian Ottawa, dietitian in Vancouver and other locations. We offer in-person and online dietitian and nutritionist appointments


Author: Julie Mancuso

Julie Mancuso


Julie Mancuso is a graduate of the University of Toronto, founder and owner of JM Nutrition, a nutritional counselling service by registered dietitians and nutritionists. For 15+ years, JM Nutrition has helped thousands reach their health, wellness and nutrition goals. Julie and her team regularly lend their expertise to a variety of health publications such as Reader's Digest, Livestrong, Business Insider, Food Network, Today's Parent, MyFitnessPal, Toronto Star, Elle Magazine, Best Life, Weight Watchers and many more.