A large international study has found that higher daily doses of semaglutide may help people with type 2 diabetes lower their blood sugar levels more effectively and lose more weight.
The research involved doctors and scientists from around the world and may help improve treatment options for millions of people living with diabetes.
Type 2 diabetes is a long-term condition that affects how the body uses sugar for energy. Normally, the body produces a hormone called insulin, which helps move sugar from the blood into the body’s cells.
In people with type 2 diabetes, the body either does not produce enough insulin or cannot use insulin properly. As a result, sugar builds up in the bloodstream.
Over time, high blood sugar can damage blood vessels and organs throughout the body. People with poorly controlled diabetes have a higher risk of heart disease, stroke, kidney disease, nerve damage, and vision problems. Because of these risks, doctors work hard to help patients keep their blood sugar within a healthy range.
One important way doctors measure long-term blood sugar control is through a test called HbA1c. This blood test shows the average blood sugar level over the previous two to three months. In general, lower HbA1c levels mean better blood sugar control.
The new study focused on people whose HbA1c levels remained too high even though they were already taking diabetes medications. The researchers wanted to know whether stronger doses of semaglutide could improve blood sugar control further.
Semaglutide is a medicine that belongs to a group of drugs called GLP-1 receptor agonists. These medicines help the body release insulin, reduce appetite, slow digestion, and lower blood sugar levels. Semaglutide has also become well known for helping some people lose weight.
The international research project was led by Dr. Vanita R. Aroda from a hospital in Boston. The study took place at 177 medical centers across 14 countries. Thousands of participants took part in the trial.
To qualify for the study, participants needed to have HbA1c levels between 8.0% and 10.5%, meaning their diabetes was not well controlled. They were already taking between one and three diabetes medications before joining the study. Participants also met body weight requirements chosen by the researchers.
The participants were divided into three groups. Each group took a different daily dose of oral semaglutide. One group took 14 milligrams, another took 25 milligrams, and the final group took 50 milligrams. The treatment continued for 68 weeks, which is a little more than one year.
During the study, researchers carefully monitored the participants’ blood sugar levels, body weight, and possible side effects. They wanted to compare how well each dose worked and whether higher doses created additional problems.
The results showed that all three doses helped lower HbA1c levels. However, the higher doses worked better. Participants taking 25 mg and 50 mg experienced larger reductions in blood sugar compared with those taking the 14 mg dose.
The higher doses also helped people lose more weight. Weight loss is often beneficial for people with type 2 diabetes because excess body weight can worsen insulin resistance and make blood sugar harder to control. Even modest weight loss may improve overall health and reduce the risk of complications.
Although the higher doses provided stronger benefits, they also caused more side effects. The most common problems involved the stomach and digestive system.
Some participants experienced nausea, diarrhea, vomiting, or stomach discomfort. These side effects were usually mild or moderate rather than severe, but they happened more often in the groups taking the stronger doses.
Doctors say this balance between benefits and side effects is important when deciding which dose may be best for each patient. Some people may tolerate higher doses very well, while others may prefer lower doses with fewer side effects.
The study findings suggest that higher-dose semaglutide could become a useful treatment option for people whose blood sugar remains too high despite using other medications. The research may also help doctors personalize treatment plans based on each patient’s health needs and ability to tolerate side effects.
Interest in semaglutide has grown rapidly in recent years because of its effects on both blood sugar control and weight management. Researchers continue studying how these medicines affect heart health, kidney disease, and long-term diabetes complications.
Experts also emphasize that medication works best when combined with healthy lifestyle habits. Eating balanced meals, exercising regularly, sleeping well, and maintaining a healthy weight remain important parts of diabetes care.
The researchers believe that future studies may help determine the safest and most effective doses for different groups of patients. As more information becomes available, doctors may have additional tools to help people manage diabetes more successfully and improve long-term health.
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The study discussed in this article was published in the journal The Lancet.
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