As millions use GLP-1 medications for weight loss, some patients are reporting unexpected psychological and relational shifts, prompting discussions on the drugs' broader impact.
Key facts
- •GLP-1 prescriptions in Australia have increased nearly 10-fold since 2020, with usage in the US more than quadrupling.
- •A 2018 Swedish study of 1,958 bariatric surgery patients found an increased incidence of divorce or separation among couples following significant weight loss.
- •Dr. Terri-Lynne South notes that GLP-1s may impact dopamine reward pathways, potentially reducing pleasure-seeking behaviors related to alcohol, nicotine, and sex.
- •A 2025 Kinsey study indicated that 18% of respondents experienced increased sexual desire while on GLP-1s, compared to 16% who experienced a decrease.
- •Some patients report that the loss of shared routines, such as eating habits, can contribute to relationship strain.
Millions of people globally are using GLP-1 medications, such as Mounjaro, to manage weight. While these drugs effectively regulate appetite and blood sugar, some patients report that significant weight loss has introduced unforeseen complexities into their long-term romantic relationships and personal identities.
By the numbers
Psychological and Relational Changes
Patients and experts note that rapid weight loss can alter relationship dynamics, sometimes revealing underlying issues previously attributed to obesity. Psychologists suggest that changes in self-confidence, shifts in shared routines, and increased attention from others can create friction in established partnerships. Some individuals report that as their weight-related insecurities diminish, they may hold partners to different standards or reassess their relationship satisfaction.
Research on Sexual Function and Desire
The impact of GLP-1s on sexual health remains a subject of ongoing study. While some research suggests potential improvements in testosterone levels, a 2025 analysis of FDA data identified 185 reports of sexual dysfunction. A 2025 Kinsey study found mixed results, with 18% of respondents reporting increased sexual desire and 16% reporting a decrease. Experts note that it is difficult to isolate whether these changes stem from the medication, the weight loss itself, or concurrent life factors.
Navigating Stigma and Dating
For those who are single, weight loss can improve confidence in dating, though some individuals experience internalized weight stigma. Some patients report feeling shame or fear of being judged as 'cheating' or lacking willpower when disclosing their use of weight-loss medication to new partners. Despite these challenges, some find that their values and personal connections remain the primary focus for potential partners.
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This article was independently rewritten by ManyPress editorial AI from reporting originally published by The Guardian Health.
