How does accelerated weight loss impact the gut and microbiota?

If you're going through an accelerated weight loss process, either with the help of the latest drugs or after bariatric surgery, you may have noticed that the changes go beyond the number on the scale. The gut is also part of this transformation.
Although the focus is often solely on losing body weight, it's important to mention that intestinal health plays a fundamental role in making this process more comfortable, balanced and sustainable. 

What changes in the intestine during rapid weight loss

Nowadays, many slimming strategies work to reduce appetite and slow down digestion. This mechanism helps to prolong the feeling of satiety, but it can also have an impact on the functioning of the digestive system.

As gastric emptying and intestinal transit slow down, the body has to adapt to a new rhythm. It's not uncommon for symptoms such as nausea, constipation or diarrhea to appear during this period. The intestine, which previously handled larger volumes of food, starts to receive less food and work differently.

In addition, excess weight is usually associated with a state of chronic inflammation and an imbalance of intestinal bacteria. Weight loss aims to correct this situation, but the transition can cause temporary discomfort until the body adjusts.

How weight loss affects the intestinal microbiota

Losing more body weight also changes the profile of the bacteria that live in the gut, the so-called gut microbiota. In the case of people who have undergone bariatric surgery, for example, studies show an increase in the population of certain bacteria, which changes the way the body uses energy from food.

These changes are important because the microbiota is not only involved in digestion. It acts in the absorption of essential nutrients such as B vitamins, vitamin K and minerals such as iron and magnesium, nutrients that may already be at reduced levels in people with obesity.

That's why keeping your gut healthy during the weight loss process is essential to avoid possible nutritional deficiencies and preserve your well-being.

Probiotics for weight loss and intestinal health

Probiotics, bacteria that are beneficial to the body, can be great allies in this process. Their benefits go beyond regulating intestinal transit:

Reduction of inflammation and abdominal measurements
Reviews of studies carried out with patients undergoing bariatric surgery show that, even without significantly increasing total body weight loss, probiotics contributed to a reduction in waist circumference and levels of inflammatory markers.

Metabolism support
The use of probiotics has also been associated with an improvement in triglyceride concentrations and markers related to liver health, which helps metabolism during weight loss.

More digestive comfort
Probiotics help to balance intestinal transit in order to relieve symptoms such as constipation or diarrhea, which are common in the early stages of the process.

Habits that help or harm intestinal health

A few simple precautions make all the difference when it comes to protecting the gut during accelerated weight loss.

What helps:

• Adequate hydration
  Drinking too little water can make constipation and nausea worse. The general recommendation is to consume between 1.5 to 2 liters of water a day. If you feel bloated, drink plenty of fluids. 30 to 60 minutes before or after meals.
  
• Strategic fiber consumption
  As food volume decreases, fiber intake usually drops. Foods such as kiwi, If recommended by health professionals, prunes or supplementary fiber help regulate the bowels.
  
• Eating calmly
  Chewing your food well and respecting satiety signals reduces abdominal discomfort.

What gets in the way:

• Lying down immediately after eating
  This habit encourages reflux and heartburn, especially when digestion is slower.
  
• Use straws to drink liquids
  It may seem like a detail, but this practice increases the intake of air, which contributes to the formation of gas and consequently abdominal distension.
  
• Nutrient-poor diets
  As the volume of food is smaller, the quality of the diet becomes even more important. Overly restrictive diets can lead to loss of muscle mass and vitamin deficiencies, which makes it common to need supplementation guided by health professionals.

Are you interested in the impact of intestinal health on well-being? Then access and discover the role of prebiotics for immunity.

Accelerated weight loss represents a major change for the whole body, and the gut is part of this adaptation. Taking care of gastrointestinal health with adequate hydration, fiber intake, the adoption of conscious habits and, when indicated, the use of probiotics, helps to reduce discomfort and favors metabolic balance. For individualized advice on diet, supplementation and intestinal care, always talk to your doctor or nutritionist.

Fonte: https://www.mdpi.com/2076-3417/14/11/4489
https://www.mdpi.com/2077-0383/12/1/145
https://www.mdpi.com/2072-6643/13/10/3386
https://www.mdpi.com/2673-4168/4/4/39
https://www.sciencedirect.com/science/article/pii/S2667368125000531