Metformin explained simply. How does metformin work? Why is it prescribed for type 2 diabetes? What are the most common side effects—and what should you know about vitamin B12 and the rare but serious risk of lactic acidosis? In this Rehealthify video, we take you inside the body to explain **how metformin works, why it can lower blood sugar, how it affects the liver and insulin sensitivity, how to take it, and what to know about potential side effects.** Whether you’ve recently been prescribed metformin, have been taking it for years, or simply want to understand what this common diabetes medication actually does, this video breaks it down in clear, straightforward language. This video: 00:00 What Is Type 2 Diabetes? 00:34 Why Is Metformin Prescribed? 01:10 What Happens If You Stop Taking Metformin? 01:40 How Metformin Works Inside Your Body 01:55 Metformin and Insulin Resistance 02:18 How to Take Metformin 02:22 Immediate-Release vs. Extended-Release Metformin 03:00 Common Metformin Side Effects 03:18 Metformin and Vitamin B12 03:30 Lactic Acidosis: The Rare but Serious Warning 04:06 Treatment Support and Managing Type 2 Diabetes 04:40 What to Remember About Metformin How does metformin work? Metformin helps control blood glucose in several ways. It reduces the amount of glucose produced by the liver, decreases the amount of glucose absorbed from food, and improves the body's response to insulin. It is commonly used alone or with other medications, including insulin, to manage type 2 diabetes. What are the common side effects of metformin? Digestive side effects are among the most commonly reported problems with metformin. These can include diarrhea, nausea, stomach discomfort, gas, indigestion, constipation, and other gastrointestinal symptoms. For some people, these effects improve as the body adjusts to treatment. Metformin can also be associated with **lower vitamin B12 levels**, particularly with longer-term use, so your healthcare professional may monitor B12 depending on your individual circumstances. Is lactic acidosis a concern with metformin? Lactic acidosis associated with metformin is **rare but potentially life-threatening**. Certain health conditions—including kidney problems—can increase concern. Symptoms such as extreme weakness, nausea, vomiting, stomach pain, difficulty breathing, dizziness, unusual heartbeat changes, muscle pain, or feeling unusually cold require prompt medical attention. If you experience concerning symptoms, seek medical attention rather than trying to diagnose the problem yourself. Important Metformin controls type 2 diabetes; it does not cure diabetes. Do not stop, restart, increase, decrease, or otherwise change your medication without speaking with your healthcare professional. If you miss a dose, follow the instructions provided by your doctor or pharmacist rather than automatically taking a double dose. Your healthcare professional should also know about your kidney function, other medications, major illness, surgery, and certain imaging procedures involving contrast, because these factors can affect how metformin should be managed. **Subscribe to Rehealthify** for clear, engaging explanations of medications, medical conditions, symptoms, and the science happening inside your body. We don't just tell you **what a medication is.** We explain **what it's doing inside your body—and why it matters.** --- Medical Disclaimer This video is for **general educational and informational purposes only** and is not intended to provide medical advice, diagnosis, or treatment. The information presented should not be used as a substitute for advice from a qualified physician, pharmacist, or other healthcare professional. **Do not start, stop, or change any medication or treatment based solely on information presented in this video.** Talk with your healthcare professional about your individual medical situation, medications, risks, and treatment options. If you are experiencing a medical emergency or potentially serious symptoms, seek immediate medical attention or contact your local emergency services. --- References **National Library of Medicine — MedlinePlus** Metformin: Drug Information https://medlineplus.gov/druginfo/meds/a696005.html **National Library of Medicine — MedlinePlus Medical Encyclopedia** Type 2 Diabetes — Oral Medicines https://www.medlineplus.gov/ency/patientinstructions/000989.htm **National Library of Medicine — MedlinePlus Medical Encyclopedia** Vitamin B12 Deficiency Anemia https://www.medlineplus.gov/ency/article/000574.htm --- #metformin #metforminexplained #metforminsideeffects #type2diabetes #diabetes #diabetesmedication #bloodsugar #insulinresistance #highbloodsugar #diabetestreatment #vitaminb12 #rehealthify