3 Health Benefits of Metformin Beyond Blood Sugar Control

Key takeaways

  • Metformin may cause modest weight loss in some people, but it is not approved by the FDA for this use.
  • For people with PMS, metformin can help regulate menstrual periods and promote fertility.
  • Metformin may be associated with a lower risk of heart attack, stroke, and cardiovascular death.

Metformin is currently a gold standard treatment for type 2 diabetes. Beyond blood sugar control, research suggests it may also support weight management, heart health, and symptoms related to polyendocrine ovarian metabolic syndrome (PMS).

1. May Support Weight Management

Metformin is generally considered weight neutral (meaning it usually does not cause weight loss or gain), but some research has shown that it can cause slight weight loss. It is sometimes used off-label to help manage weight gain and metabolic side effects associated with antipsychotic medications.

In the Diabetes Prevention Program Outcomes Study, 28.5% of people taking metformin lost at least 5% of their body weight after one year.

Although some research has shown that metformin can help with weight loss, it is not approved by the Food and Drug Administration (FDA) for this use, and results may vary depending on individual factors such as changes in diet and exercise as well as response to treatment.

2. Can help with PMOS

PMOS is often associated with insulin resistance. Insulin resistance is a condition in which the body has difficulty responding to insulin, which can lead to high blood sugar and weight gain.

For people with PMS, metformin may help improve the response to insulin, which can regulate certain hormones. This can help support more regular menstrual cycles, ovulation and fertility.

Keep in mind that metformin is not approved by the FDA for PMOS, but healthcare providers may prescribe it off-label for this use, often in combination with other treatments.

3. May Benefit Heart Health

In addition to reducing blood sugar, some research suggests that metformin may be associated with a lower risk of cardiovascular events (such as heart attack or stroke).

Additionally, some research suggests that metformin may be associated with a lower risk of cardiovascular death compared to some other diabetes medications, such as sulfonylureas. Metformin’s effects on cholesterol, insulin sensitivity, and other metabolic factors may contribute to these effects.

Why do healthcare providers prescribe metformin?

Metformin is approved by the FDA to improve blood sugar control in people with type 2 diabetes and is usually recommended in combination with diet and exercise. Health care providers sometimes prescribe metformin off-label, that is, for use that is not approved by the FDA. Some of these uses include:

  • Treatment of PMS, including associated infertility
  • Delaying early puberty and the onset of menstruation in girls who start puberty too early
  • To treat gestational diabetes (diabetes during pregnancy)
  • To treat prediabetes and insulin resistance
  • To treat weight gain and metabolic side effects caused by antipsychotic medications

So, the primary use of metformin is to manage blood sugar levels in people with type 2 diabetes, but it is also prescribed off-label for other reasons, even though it is not approved by the FDA for these uses.

What researchers study next

Researchers continue to study various uses of metformin beyond blood sugar control, such as possible effects on inflammation, aging, and other metabolic processes. However, more research is needed before it can be recommended for these uses. Always consult your healthcare professional for personalized medical advice.

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts in our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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Karen Berger

By Karen Berger, PharmD

Karen Berger, PharmD, is a community pharmacist and medical writer/editor.

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