When it comes to weight loss, the first impulse is to cut sugar — a measure frequently recommended for those who are overweight or obese — especially excessive consumption of soft drinks, desserts, sweets and sweetened beverages. But is that, by itself, sufficient?

First and foremost, it is essential to understand how sugar acts in the body and what is, in fact, its influence on the development of overweight and obesity.

How sugar acts in the body

When you consume sugar, it is rapidly absorbed and enters the bloodstream, raising blood glucose levels. In response, the pancreas releases insulin, a hormone responsible for transporting this glucose to the cells, where it is converted into energy.

When you consume sugar in excess — especially in a repeated manner — your body begins to store what it cannot use immediately. This storage occurs mainly in the form of fat, contributing to weight gain.

Furthermore, frequent sugar consumption can lead to:

  • Rapid peaks and drops in glucose, leaving you hungrier shortly after
  • Insulin resistance, where the body does not respond well to the hormone and accumulates more fat
  • Chronic inflammation in the body
  • Disruptions in appetite and satiety, making calorie control difficult

Is cutting sugar alone sufficient?

Reducing sugar consumption is important and can have a significant impact on weight loss. However, it is not the sole and isolated solution for overweight and obesity.

Remember: weight gain is the result of a caloric imbalance — you consume more calories than you expend. Sugar contributes to this, but it is not the only factor.

Other essential aspects include:

  • Total calorie intake — regardless of the source (proteins, fats, carbohydrates)
  • Overall diet quality — including whole foods, fruits, vegetables and proteins
  • Regular physical activity — to expend energy and maintain muscle mass
  • Sleep pattern — inadequate rest affects hormones related to hunger
  • Stress management — chronic stress can lead to compulsive eating
  • Genetic and metabolic factors — each person has unique characteristics

Cutting sugar is an excellent starting point and can result in visible changes, but for lasting results in weight control, a more comprehensive approach is necessary involving balanced eating, regular movement and healthy lifestyle habits.

When we talk about sugar, it is important to remove the idea that it is only a "villain" or "harmless." In practice, it acts as a source of energy and the problem lies much more in the form, quantity and frequency of consumption than in sugar in isolation.

What happens when you consume sugar?
When you ingest sugar (mainly those with rapid absorption, such as soft drinks, sweets and ultra-processed foods), it is rapidly transformed into glucose in the blood.

This glucose increases rapidly in our body in what we call a "glycemic spike."

And what does the body do with this?
The body needs to control this glucose. So the pancreas releases a hormone called insulin. Insulin has a very clear function: to put glucose inside the cells, to be used as energy.

And when there is too much sugar?
When this process happens repeatedly (a lot of sugar, many times a day), the body begins to deal with excess energy. And then three important things happen:

First, part of this glucose becomes immediate energy storage (glycogen) and when this storage is full, the excess begins to be converted into fat and this accumulation contributes directly to weight gain

The hormonal impact and on appetite
Sugar doesn't just affect energy, it affects eating behavior. When there are rapid peaks in glucose, followed by rapid drops, they generate: More hunger, desire for more sugar and sensation of a "vicious cycle," that is: the more you consume, the more you tend to want to consume. And in the long term excessive and frequent consumption can lead to important alterations, such as:

Insulin resistance (the body stops responding well to insulin)

Greater risk of developing Type 2 Diabetes

Increase in fat accumulation, mainly abdominal

Greater cardiovascular risk

Is sugar the main problem?
Sugar facilitates caloric excess (and that is the main thing)

The eating pattern of consuming sugar with increased frequency, associated with the person's metabolic context, favors fat storage, causes hormonal dysregulation and increases the risk of metabolic diseases.

Weight gain occurs when there is consumption of more calories than expenditure.

And sugar has two characteristics that favor this which is highly palatable (the more you consume, the more you want) and is present in many foods in a "hidden" way.

Sugar does not cause obesity in isolation.
But it facilitates excessive calorie consumption, favors fat accumulation, dysregulates hunger and satiety and contributes to metabolic alterations.

And, therefore, significantly increases the risk of overweight and obesity, so the combination of regular physical activity, adequate sleep and good nutrition is the best choice when thinking about healthy weight loss.

Dr. Rebeca Soares Andrade CRM - GO 39335