Do statins cause weight gain?

Weight gain is not a reported side effect of statin use, but gaining weight during statin treatment is possible, mainly due to changes in dietary habits.

Limited evidence also suggests that some statins may contribute to weight gain by lowering leptin levels. Leptin is a protein hormone that helps your body regulate long-term energy levels and body weight.

What are the possible causes of weight gain with statins?

Some people report body changes while taking statins, including:

increased waist circumference
higher abdominal fat
overall weight gain

Dietary changes may be one reason some people taking statins gain weight. People who take statins may feel they don’t need to watch what they eat anymore, which could lead them to add fat and calories to their diet.

A 2025 study on the effects of atorvastatin on young pigs found that the drug caused metabolic changes in the animals. These findings do not prove that statins cause weight gain, but they may explain how they affect metabolism. More specifically, researchers observed:

Increased Ghrelin: Statin use boosted the levels of this hormone, which increases appetite and affects fat cells.
Insulin resistance: The medication increased the chance of the animals developing diabetes, and was reported to induce insulin resistance. Insulin resistance makes it harder for the body to maintain or lose weight.
Altered fat cell hormones: Statins elevated the blood level of leptin and resistin, hormones produced by fat cells. Some evidence points to a link between these hormones and obesity.

Results of animal studies do not always apply to humans, though. More research is needed to understand the link between statins and weight changes.

Is weight management different with statins versus without them?

If you take a statin, it’s important to continue eating a balanced diet and staying physically active, such as exercising regularly.

The ways to maintain a moderate weight when taking a statin are the same as when you’re not taking one. They include:

staying physically active, such as exercising regularly, ideally getting in at least 150 minutes of moderate activity per week
eating plenty of fiber
getting plenty of sleep
limiting portion sizes to manage calorie intake
swapping out low nutrient foods with more nutritious alternatives
staying hydrated
avoiding food and drinks high in added sugar

Which statin is best for weight management?

There is no best statin for weight management since these medications are prescribed to help lower cholesterol levels, not to decrease or change body weight. Your doctor will prescribe the statin and the appropriate dosage for you.

Summary

Some evidence suggests that people taking statins often gain weight after they start their medication. Weight gain might primarily be caused by dietary changes rather than the medication itself.

Researchers are still investigating the link between statins and weight gain. If you take a statin, eating a balanced overall diet can help you prevent weight gain. Specifically, try to avoid consuming highly processed foods that are high in calories and low in nutrition.