The Root Causes Of Weight Gain: Unmasking Them!


Our recommendations are rooted in genuine belief in the benefits of the products bring to users. When you purchase through our links, we may earn a commission, supporting our testing and development without adding any cost for you. Learn more.

Struggling to lose weight, or find yourself steadily gaining more weight over time? The culprit may be one or more root causes of weight gain that are important to understand. By identifying and addressing the underlying reasons why we put on extra pounds, we can improve our chances of successfully slimming down and keeping the weight off long-term.

In this article, we’ll explore some of the key root causes of weight gain including diet, activity level, genetics, medical conditions, medications, mental health, and age-related factors.

Conditions That Can Cause Weight Gain

Root Causes of Weight Gain

Dietary Habits

One of the most obvious yet overlooked causes of weight gain is diet. Consuming too many calories from sugars, refined carbohydrates, saturated fats, and processed foods promotes the storage of excess energy as fat. Overeating, large portion sizes, and a highly palatable diet of salty and sugary foods also contribute. On the flip side, a diet low in fiber slows down digestion and leads to overeating.

The root problem is unhealthy dietary patterns promoted by the availability of junk foods and lack of nutrition education. Addressing a poor diet by reducing empty calorie foods, adding nutritious whole foods, and controlling portions are key for weight management.

Activity Levels

Another major factor in the weight gain equation is a sedentary lifestyle. Low physical activity and too much time spent sitting decrease the calories we expend during the day. A lack of exercise leads to a loss of calorie-burning muscle mass and a slower metabolism.

The root causes here include lack of motivation to exercise, overuse of technology and other conveniences, work and lifestyle factors, and insufficient sleep. Incorporating more physical activities into your routine provides a simple solution.

Genetic Factors

For some individuals, genes and family history increase their predisposition to putting on weight. A slower metabolism, a tendency to store fat, physiological hunger signals, and a preference for high-calorie foods may be inherited.

While genetic factors are outside of our control, they simply mean extra diligence is required for weight management in the face of biological challenges. Understanding any genetic influences can motivate you to make helpful lifestyle changes.

Medical Conditions

Several medical conditions potentially contribute to weight gain. These include hypothyroidism, Cushing’s disease, chronic inflammation, insulin resistance, PCOS, chronic stress, and some medications used for the treatment of psychiatric disorders and diabetes.

The root cause is hormonal or metabolic imbalances these conditions create. Consulting a doctor to identify and manage relevant conditions, along with lifestyle modifications, can get to the bottom of unexplained weight gain.


Prescription drugs used to treat mood disorders, diabetes, seizures, high blood pressure, and other chronic illnesses can lead to extra pounds as a side effect. This is due to impacts on metabolism, appetite, fluid retention, and fat storage.

If you suspect your medication is causing weight gain, do not stop taking it before discussing it with your doctor. Switching prescriptions or making dietary changes may provide a solution. Otherwise, the benefits of the medicine likely outweigh modest weight gain.

Mental Health

Factors like depression, anxiety, emotional eating, and binge eating can cause unhealthy eating patterns and weight gain. Overeating may be used as a coping mechanism to deal with negative emotions and stress. On the other hand, poor body image and low self-esteem fuel emotional distress that perpetuates overeating.

Getting to the root of mental health triggers, building self-esteem, adopting coping strategies beyond food, and seeking therapy when needed is imperative. Our psychological health greatly affects our ability to manage weight successfully.

Age-Related Factors

As we age, hormonal changes, loss of muscle mass, and decreased activity levels create a perfect storm for weight gain. Menopause transition in women decreases estrogen production leading to more belly fat storage. Meanwhile, men experience decreasing testosterone levels which also promotes fat gain.

While age itself cannot be reversed, understanding the physiological changes allows us to proactively modify diet and exercise. Weight gain is not an inevitable part of aging with proper lifestyle strategies.


In summary, the root causes of weight gain are multidimensional but often boil down to diet, exercise, mental health, and physiological factors. Identifying and addressing the specific causes relevant to your situation provides the foundations for successfully losing weight and keeping it off. With a customized approach, you can overcome obstacles and achieve long-term weight goals.

Dr. David G Kiely is a distinguished Medical Reviewer and former General Medicine Consultant with a wealth of experience in the field. Dr. Kiely's notable career as a General Medicine Consultant highlights his significant contributions to the medical field.

Learn More

Leave a Comment