Do GLP-1 medications cause suicidal thoughts?
The available research gives no indication that GLP-1 medications cause suicidal thoughts; several large studies actually point to a lower risk. If you have doubts or concerns, discuss them with your doctor.
GLP-1 medications do not increase the risk of suicidal thoughts, and may in fact lower that risk. In a study of more than 240,000 people with excess weight, semaglutide compared with other weight-loss medications was linked to a substantially lower risk of new-onset suicidal thoughts. In adolescents with obesity, researchers found a 33% lower risk of suicidal thoughts or attempts compared with young people who received lifestyle counselling alone.
In an analysis of four randomised, placebo-controlled trials in adults without a serious psychiatric history, only 1% or fewer of participants reported suicidal thoughts, and this was no more common with semaglutide than with placebo. There was even a small reduction in depressive symptoms, though it is so modest that it carries little practical significance. Some of the authors have financial ties to the manufacturer of semaglutide, which is worth bearing in mind when interpreting this particular study.
One large database analysis did report an elevated risk of suicidal behaviour, serious depression, and anxiety disorders in GLP-1 users. That finding runs counter to the rest of the research. The most likely explanation is that people who are prescribed GLP-1 medications more often already have a psychiatric history before they start, and the analysis was unable to fully account for this. Adverse-event databases from the FDA, EudraVigilance, and the WHO show no elevated signal for suicide, although they do record more reported cases of suicidal thoughts for semaglutide and liraglutide than for some other diabetes medications.
The WHO adverse-event database shows a striking pattern: more reports of suicidal thoughts, but fewer reports of suicide attempts and completed suicides. This suggests that the reports of suicidal thoughts are partly explained by heightened attention and vigilance following public debate on the topic, rather than by a genuinely elevated risk. Cause and effect can never be established from spontaneous reporting data. If you yourself are experiencing suicidal thoughts, or if you are using GLP-1 medications and have concerns, please discuss this with your doctor.
This answer draws on several large studies in humans, including one randomised placebo-controlled trial (with the caveat regarding manufacturer ties), a study with more than 240,000 participants, and analyses of international adverse-event databases. The researchers themselves emphasise that cause and effect cannot be established from most of these data sources, and that the one outlier study reporting a higher risk is likely confounded by a pre-existing psychiatric history in GLP-1 users that was already present before starting the medication.
Can GLP-1 agonists improve heart function?
GLP-1 agonists, and in particular semaglutide and tirzepatide, demonstrably reduce the risk of heart failure worsening in people with a specific form of heart failure; if you have this condition or type 2 diabetes, discuss with your cardiologist whether these agents are appropriate for you.
What are the benefits and risks of microneedling?
Microneedling is best supported by evidence for atrophic acne scars, with consistent positive results across multiple randomised studies. For other skin concerns the indications are promising but less certain, and those with darker skin tones would be wise to discuss the risk of dark spots with a dermatologist beforehand.
What health benefits do GLP-1 medications offer beyond weight loss?
In type 2 diabetes, GLP-1 medications offer well-supported protection for the heart, blood vessels, and kidneys; there are also preliminary indications of effects on the liver and brain, but these are too early to act on.
Do you lose muscle mass when losing weight with a GLP-1 medication, and how do you prevent it?
With GLP-1 medications you do indeed lose muscle mass alongside fat, but you can largely limit this by combining resistance training with adequate protein intake. If you are older or already frail, discuss this risk explicitly with your doctor before starting.