Continuous glucose monitoring (CGM) and traditional blood glucose monitoring (BGM) are pivotal tools in managing Type 2 diabetes mellitus (T2DM), with significant implications for glycemic control. This review compared the effectiveness of CGM versus BGM in reducing hemoglobin A1c (HbA1c) levels among adults with T2DM over six months. Utilizing a narrative synthesis approach based on existing literature, this article evaluated the mechanisms, impacts, behavioral implications, and challenges associated with each monitoring method. CGM, characterized by its real-time data and trend analysis capabilities, offers superior HbA1c reduction outcomes, especially for individuals with poor baseline control. By providing continuous feedback, CGM facilitates immediate adjustments in lifestyle and medication, empowering proactive diabetes management. Conversely, BGM, reliant on episodic fingerstick testing, is effective but often less impactful due to its intermittent nature and dependence on user adherence. Nevertheless, it remains a cost-effective and accessible option for many. Challenges such as high costs for CGM and adherence barriers for BGM were explored, along with the potential of emerging innovations, including integrated automated insulin delivery systems for CGM and enhanced digital tools for BGM. This review underscores the importance of aligning monitoring strategies with individual patient needs to optimize HbA1c reduction and improve quality of life for adults with T2DM. Keywords: Continuous Glucose Monitoring (CGM), Traditional Blood Glucose Monitoring (BGM), HbA1c Reduction, Type 2 Diabetes Mellitus (T2DM), Glycemic Control Strategies.
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