Fasting Blood Sugar Levels: Why Are They Increasing? - Internal Medicine

More Info

---

Fasting blood sugar levels can fluctuate for a variety of reasons, and it’s important to understand the factors that contribute to these changes. In your case, you mentioned that your fasting blood sugar was 90 on September 23 and then increased to 92 on October 2. While this may seem like a small increase, it can be concerning, especially if you have a family history of diabetes.

First, let’s clarify what fasting blood sugar levels mean. Fasting blood sugar is typically measured after an overnight fast of at least 8 hours. Normal fasting blood sugar levels are generally considered to be below 100 mg/dL. Levels between 100 and 125 mg/dL indicate prediabetes, while levels of 126 mg/dL or higher on two separate tests suggest diabetes. Your readings of 90 and 92 mg/dL fall within the normal range, but the slight increase could be indicative of several factors.

1. Dietary Influences: What you eat can significantly impact your blood sugar levels. If you consumed a higher carbohydrate meal or snacks before the fasting period, this could lead to increased blood sugar levels. It’s essential to maintain a balanced diet with a focus on whole foods, fiber, and healthy fats to help stabilize blood sugar.

2. Physical Activity: Regular exercise is crucial for maintaining healthy blood sugar levels. If your activity level has decreased or if you have been less consistent with your exercise routine, this could contribute to higher fasting blood sugar levels. Aim for at least 150 minutes of moderate aerobic activity each week, along with strength training exercises.

3. Stress and Sleep: Both physical and emotional stress can lead to increased blood sugar levels. Stress hormones like cortisol can cause the liver to release more glucose into the bloodstream. Additionally, inadequate sleep can affect insulin sensitivity and glucose metabolism, leading to higher blood sugar levels.

4. Hormonal Changes: Hormonal fluctuations, particularly in women, can affect blood sugar levels. Conditions such as polycystic ovary syndrome (PCOS) or changes related to the menstrual cycle can impact insulin sensitivity and glucose levels.

5. Hydration: Dehydration can lead to higher blood sugar levels. When you are dehydrated, your blood becomes more concentrated, which can result in higher readings. Ensure you are drinking enough water throughout the day.

6. Measurement Variability: Blood sugar readings can vary based on the time of day, the method of measurement, and even the specific device used. It’s essential to ensure that your blood glucose meter is calibrated correctly and that you are following the manufacturer's instructions for accurate readings.

Given your family history of diabetes, it’s wise to monitor your blood sugar levels regularly and maintain a healthy lifestyle. If you continue to see fluctuations or if your fasting blood sugar levels rise above 100 mg/dL consistently, it would be advisable to consult with a healthcare professional. They may recommend further testing, such as an oral glucose tolerance test or HbA1c test, to assess your overall glucose metabolism and risk for diabetes.

In summary, while your fasting blood sugar levels are still within the normal range, it’s essential to consider the various factors that can influence these readings. Maintaining a healthy diet, regular physical activity, managing stress, and ensuring adequate hydration can all contribute to stable blood sugar levels. If you have ongoing concerns, don’t hesitate to reach out to your healthcare provider for personalized advice and support.