A new study has found that both weight loss surgery and modern weight loss medications can help improve the balance between fat and muscle in people with obesity.
The research, carried out by Vanderbilt Health and published in JAMA Network Open, offers new insight into how these treatments affect the body over time.
Obesity is not only about body weight. It is also about how much of that weight is made up of fat versus muscle. Too much fat is linked to serious health risks, including heart disease and early death.
On the other hand, having more muscle is linked to better strength, better metabolism, and longer life. This is why doctors are now paying more attention to body composition rather than just total weight.
The study looked at two common approaches to weight loss. One is bariatric surgery, which changes the digestive system to help people lose weight. The other is the use of medications such as semaglutide and tirzepatide, which help control appetite and food intake.
Researchers studied over 3,000 patients aged 18 to 65. Some had surgery, while others took weight loss drugs. The team followed these patients for up to two years and used medical records to track their progress.
To understand changes in the body, the researchers used a technique that estimates fat and muscle levels based on electrical signals in the body. This method allowed them to see how fat mass and fat-free mass changed over time.
The results showed that both treatments were effective in reducing body fat. This is important because lowering fat can reduce the risk of many diseases. At the same time, there was also a loss of muscle, but this loss was smaller compared to the loss of fat.
Because fat decreased more than muscle, the overall balance improved. In other words, patients ended up with a healthier body composition. This suggests that both treatments can help people not only lose weight but also improve their overall health profile.
The study also found that men and women responded differently. Men tended to keep more of their muscle over time, while women lost slightly more lean mass. This difference may be due to biological factors, but more research is needed to understand why.
These findings highlight an important message. Losing weight alone is not enough. It is also important to maintain muscle. Muscle plays a key role in movement, stability, and metabolism. Losing too much muscle can weaken the body and reduce the benefits of weight loss.
The study has some limitations. It used existing medical data rather than a controlled experiment, which means other factors may have influenced the results. Also, the measurement method provides estimates rather than exact values.
Even so, the study offers useful guidance. It suggests that weight loss treatments should be combined with strategies to protect muscle, such as physical activity and proper nutrition. This could help patients achieve better long-term outcomes.
In conclusion, both surgery and weight loss drugs can improve body composition by reducing fat more than muscle. However, the loss of muscle remains a concern that needs attention. Future research should focus on ways to minimize muscle loss and create more balanced treatment plans.
If you care about muscle, please read studies about factors that can cause muscle weakness in older people, and scientists find a way to reverse high blood sugar and muscle loss.
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