How much weight can you expect to lose on Ozempic if you don't have diabetes?
The short answer is: a lot, and it's sustained. In the landmark SELECT trial, which followed over 17,000 people with overweight or obesity and preexisting heart disease but no diabetes, those taking semaglutide lost an average of 10.2% of their body weight over 4 years, while the placebo group lost only 1.5% [3]. That's roughly 20-25 pounds for a 220-pound person, and the weight loss continued for over 65 weeks before plateauing and staying off for the full four years.
A separate real-world study of 175 patients at a weight management clinic found that after 6 months on the higher doses (1.7 mg or 2.4 mg weekly), people without diabetes lost an average of 11.8% of their body weight, compared to 7.2% in those with diabetes [1]. Nearly 55% of the non-diabetic group lost at least 10% of their body weight, and about 24% lost 15% or more [1]. These numbers are very close to what was seen in the original clinical trials, confirming the drug works as well in everyday practice as it does in controlled studies.
What happens if you stop taking Ozempic? Will the weight come back?
Yes, weight regain is very likely if you stop. In a randomized withdrawal study called STEP 4, people who had already lost an average of 10.6% of their body weight on semaglutide over 20 weeks were then split into two groups: one continued the drug, the other switched to placebo. Over the next 48 weeks, those who stayed on semaglutide lost an additional 7.9% of their body weight, while those who switched to placebo regained 6.9% [2]. That means stopping the medication led to regaining about two-thirds of the lost weight within a year.
This pattern is echoed in a real-world study of patients with type 2 diabetes, where weight loss was maintained at 12 and 24 months only as long as treatment continued [6]. A separate commentary on the STEP trials noted that after discontinuation, participants regained 11.6% of their lost weight [5]. The bottom line: Ozempic is not a one-time fix. It works as a long-term treatment, and stopping it typically leads to significant weight regain.
Are there any risks or side effects specific to non-diabetics using Ozempic for weight loss?
The most common side effects are gastrointestinal — nausea, vomiting, and diarrhea — reported by about 49% of people in the STEP 4 trial [2]. However, a recent analysis of online user reviews found that even when people experienced these side effects, they were generally willing to continue the medication as long as they were losing weight [7]. The bigger concern for non-diabetics may be less obvious.
A 2024 study using insurance claims data found that non-diabetic men prescribed semaglutide had a 10-fold higher risk of being diagnosed with erectile dysfunction or receiving a prescription for erectile dysfunction medication compared to matched controls (1.4% vs. 0.14%) [4]. They also had more than double the risk of being diagnosed with testosterone deficiency (3.83% vs. 1.7%) [4]. While the absolute risk is low, this is a potential side effect that clinicians and patients should discuss, especially since the drug is often used for cosmetic weight loss in otherwise healthy individuals. The authors note that these hormonal effects were unexpected, as weight loss typically improves erectile function [4].
About These Sources
This answer is built on 7 peer-reviewed studies — published from 2021 to 2026, 5 from 2024 or later, 3 in Q1 journals, collectively cited 1,526 times — selected as the most relevant from 10 studies that passed quality screening, drawn from 70 papers retrieved from a database of over 500 million.
Sources used in this answer
Weight Loss Outcomes Associated With Semaglutide Treatment for Patients With Overweight or Obesity
In a real-world cohort of 175 patients with overweight or obesity, those without type 2 diabetes lost an average of 11.8% of their body weight after 6 months on semaglutide 1.7-2.4 mg weekly, compared to 7.2% in those with diabetes [1].
Effect of Continued Weekly Subcutaneous Semaglutide vs Placebo on Weight Loss Maintenance in Adults With Overweight or Obesity
In a randomized withdrawal trial (STEP 4), continuing semaglutide 2.4 mg weekly for 48 weeks after initial weight loss led to an additional 7.9% weight loss, while switching to placebo led to a 6.9% regain [3].
Long-term weight loss effects of semaglutide in obesity without diabetes in the SELECT trial
In the SELECT trial of over 17,000 adults with overweight or obesity and cardiovascular disease but no diabetes, semaglutide produced a mean 10.2% weight loss sustained over 4 years, versus 1.5% with placebo [4].
(157) Prescribing Ozempic and Wegovy for Weight Loss is Associated with an Increased Risk of Erectile Dysfunction and Hypogonadism in Non-Diabetic Males
In a claims-based analysis of 2,117 non-diabetic men, semaglutide prescription was associated with a 10-fold higher risk of erectile dysfunction (1.4% vs. 0.14%) and a 2.25-fold higher risk of testosterone deficiency (3.83% vs. 1.7%) compared to matched controls [5].
Semaglutide and weight loss – a concern for diabetics and pharmaceuticals
A commentary notes that in the STEP 1 trial, 1,961 participants regained 11.6% of lost weight after discontinuing semaglutide, and warns against off-label use in non-obese, non-diabetic individuals [7].
Real-world effectiveness of Semaglutide treatment on weight loss maintenance after weight loss in patients with obesity or overweight and diabetes.
In a real-world study of 175 patients with type 2 diabetes and overweight/obesity, semaglutide (injectable and oral) induced weight loss that was maintained at 12 and 24 months of continued treatment [8].
Patient Perceptions of Ozempic (Semaglutide) for Weight Loss: Mixed Methods Analysis of Online Medication Reviews.
Analysis of 60 online user reviews of Ozempic for off-label weight loss found that satisfaction was driven primarily by perceived effectiveness rather than tolerability of side effects, with gastrointestinal complaints common but not a major reason for discontinuation [10].