Metformin primarily works by reducing glucose production in the liver. It inhibits gluconeogenesis, the process where the liver creates new glucose from non-carbohydrate sources. This decreases the amount of glucose released into the bloodstream, lowering blood sugar levels.
Improved Insulin Sensitivity
Beyond liver effects, metformin enhances insulin sensitivity in peripheral tissues, such as muscle and fat. This means these tissues better absorb glucose from the blood in response to insulin, further reducing blood sugar. Improved insulin sensitivity also helps prevent insulin resistance, a key factor in type 2 diabetes.
Increased Glucose Uptake
Metformin also increases glucose uptake by the cells, particularly muscle cells. This happens through various mechanisms, including activation of AMPK, a cellular energy sensor, influencing glucose transporter proteins (GLUTs). The increased glucose uptake contributes to lower blood glucose levels.
Gut Microbiota Influence
Recent research suggests metformin interacts with the gut microbiota, modifying its composition and leading to changes in short-chain fatty acid (SCFA) production. These SCFAs, such as butyrate, can contribute to improved insulin sensitivity and reduced glucose production, further supporting the drug’s blood sugar-lowering effects.
Important Note:
Always consult your doctor before starting or stopping any medication, including metformin. They can assess your individual health needs and determine the appropriate dosage and monitoring plan.
