There is more to weight regain afer weight loss than the food on your fork. The quantity and quality of food remain highly important, but they are not the only obstacles to keeping weight off.

For some time, it was believed that food intake simply needed to be less than daily energy consumption for weight loss. However, complex biological changes in metabolism, hormones and appetite regulation contribute to the challenge of maintaining long-term weight loss.

Weight regulation in the brain is controlled by three main areas: the hypothalamus, the mesolimbic area and the frontal lobe. The hypothalamus is responsible for stimulating hunger, food-seeking behaviour and regulating energy intake and expenditure.

Emotional eating, as well as eating for pleasure and reward, is influenced by the mesolimbic area. Within this area, sensory aspects of food, such as smell, taste and sight, are processed.

Environmental triggers can create a desire to eat. This explains why we may suddenly feel the need to eat when the smell of a fast-food restaurant lingers in the air, or why seeing an advertisement for your favourite beverage can result in an impulsive purchase.

This desire to eat is associated with dopamine, a neurotransmitter involved in the brain’s reward system. It can contribute to pleasurable sensationd and reinforce the desire to eat, even when we are physically satiated.

Foods high in sugar and fat can be particularly rewarding and may trigger a strong reward response, creating a short-lived feeling of immediate pleasure. As the reward response subsides, feelings of regret may follow.

Highly rewarding foods can reinforce eating behaviour, while guilt and subsequent restriction may contribute to the cycle of future cravings.

The frontal lobe is involved in decision-making and self-control. The impulses influencing what we decide to eat are managed in this area and can help override emotional eating signals.

These impulses are best supported by circumstances such as low stress, adequate sleep and a supportive environment. Overeaating or making less ideal food choices can easily happen during periods of high stress, when self-control may not be as resilient as we would like.

The frontal lobe has a significant influence on the food choices we make, receiving and integrating signals from the hypothalamus, the mesolimbic area and the gut.

Knowing that emotional eating impulses can be influenced by the frontal lobe, and that self- control can be strengthened through practice, we can take back accountability for our behaviour.

Establish lasting behavioural changes by breaking old habits and building positive habits through small, consistent actions. Habit formation can take up to two months, although the time required differs from person to person.

Start with targeted interventions rather than aiming for perfection, and avoid seeing setbacks as failures.

Decision Fatigue and the Food Environment

Weight management becomes particularly challenging when decision fatique sets in. After er a long and stressful workday, our capacity to make thoughful food decisions can be much lower.

A practical strategy is to make the healthier choice the easier choice by having convenient options available before you need them.

Practical ideas include:

• Keep ready-to-go, nutritious snacks available for when hunger hits. Fresh fruit is an ideal go-to option – as are nuts, lean biltong, wholegrain Provitas with peanut butter
  or cottage cheese.
• Have a few quick, simple recipes that require minimal effort.
• Have a basic family menu available for the week that you can fall back on when you
  don’t have the energy to decide what to cook.
• Meal prep on a Sunday so that you have “in-case-of-emergency” meals ready for the
  week.
• When preparing dinner, make an extra portion for lunch the following day.
• Keep frozen vegetables in the freezer to easily add to any meal, such as Hawaiian stir-fry, roast vegetable mixes or mixed vegetables.
• Have a salad base at home, such as lettuce or baby spinach, tomato and cucumber,
  to easily build a meal around.
• After losing weight, hunger is not simply a matter of willpower. Changes in appetite , regulating hormones, hunger signals and energy expenditure can make maintaining a lower body weight biologically more challenging.
  Sustainable weight management isn’t always about having more willpower. Sometimes it is about building supportive environments and habits that help us make better choices when willpower is low.
  
• About the author
  Karina Botha is a qualified dietitian and breastfeeding consultant with a passion for supporting individuals and families through practical and evidence-based nutritional care. Let’s build healthy, realistic habits that support long-term health and confidence.