摘要
Insulin resistance（胰岛素抵抗）在血糖水平出现异常之前可能已经存在多年，这意味着标准血糖检测可能会漏检早期代谢功能障碍。Berg 博士解释说，检测空腹胰岛素水平——而非空腹血糖——能更准确地反映一个人在通往type 2 diabetes（2型糖尿病）道路上所处的阶段。血糖正常但伴有insulin resistance，代表一种早期的”前前驱糖尿病”状态，这一阶段是可以被识别和干预的。
核心要点
- 血糖正常并不能排除insulin resistance——两者可以同时存在，尤其是在早期阶段。
- 常规就医通常检测的是血糖，而非胰岛素水平，这可能导致问题完全被忽视。
- Insulin resistance的出现可能比type 2 diabetes早达 10年。
- 疾病进展遵循以下链条：insulin resistance → 胰岛素升高 → 最终血糖调节紊乱 → pre-diabetes（前驱糖尿病）→ type 2 diabetes。
- 当细胞产生胰岛素抵抗时，胰腺会代偿性地分泌越来越多的胰岛素，从而暂时维持血糖正常。
- 申请进行空腹胰岛素检测（而不仅仅是空腹血糖检测）是发现早期胰岛素抵抗的关键诊断步骤。
- 即使血糖看起来正常，空腹胰岛素水平升高也能证实胰岛素抵抗的存在。
详细内容
通往糖尿病的事件链
Berg 博士梳理了一条清晰的疾病进展路径，这一进程在血糖读数出现问题之前很久便已开始：
- Insulin resistance形成——细胞对胰岛素的响应能力下降。
- 胰岛素无法正常进入细胞，触发反馈信号传递至pancreas（胰腺）。
- 胰腺加大胰岛素分泌以进行代偿，将血糖维持在正常范围内。
- 血糖仅在后期才开始升高——即胰腺无法继续代偿之时——此时pre-diabetes乃至type 2 diabetes才会出现。
这意味着患者可能在多年间一直承受胰岛素抵抗带来的症状——如疲劳、体重增加、脑雾或食物渴求——而其医生的血糖检测却显示一切正常。
应该申请的正确检测
- 标准检测： 空腹血糖——测量血糖水平，无法发现早期胰岛素抵抗。
- **推荐检测：**空腹胰岛素检测——直接测量血液中的循环胰岛素水平。
- 若空腹胰岛素高于正常值，无论血糖读数如何，均可证实胰岛素抵抗的存在。
- Berg 博士建议患者主动向医生申请该项检测，因为它并不包含在大多数人的常规血液检查项目中。
为何这一时间窗口至关重要
胰岛素升高而血糖仍处于正常水平的阶段，是一个关键的干预窗口期。在这一阶段——即血糖调节紊乱尚未出现之前——发现胰岛素抵抗，能够为更早进行生活方式干预提供机会，也更有可能在病情进一步发展之前实现逆转。
涉及概念
- insulin resistance
- fasting insulin test
- fasting glucose test
- type 2 diabetes
- pre-diabetes
- pancreas
- blood sugar regulation
- ketogenic diet
English Original 英文原文
Summary
Insulin resistance can exist for years before blood sugar levels become abnormal, meaning standard glucose tests may miss early-stage metabolic dysfunction. Dr. Berg explains that testing fasting insulin levels — rather than fasting glucose — provides a more accurate picture of where someone is on the path toward type 2 diabetes. Normal blood sugar with insulin resistance represents an early, pre-pre-diabetes stage that can be identified and addressed.
Key Takeaways
- Normal blood sugar does not rule out insulin resistance — the two can coexist, especially in early stages.
- Standard doctor visits typically test blood glucose, not insulin levels, which can miss the problem entirely.
- Insulin resistance can precede type 2 diabetes by up to 10 years.
- The progression follows a chain: insulin resistance → elevated insulin → eventual blood sugar dysregulation → pre-diabetes → type 2 diabetes.
- When cells resist insulin, the pancreas compensates by producing increasingly more insulin, keeping blood sugar temporarily normal.
- Requesting a fasting insulin test (not just a fasting glucose test) is the key diagnostic step to detect early-stage insulin resistance.
- Elevated fasting insulin levels confirm insulin resistance even when blood glucose appears normal.
Details
The Chain of Events Leading to Diabetes
Dr. Berg outlines a clear progression that begins long before blood sugar readings become problematic:
- Insulin resistance develops — cells stop responding effectively to insulin.
- Insulin fails to enter cells normally, triggering a feedback signal to the pancreas.
- The pancreas ramps up insulin production to compensate, keeping blood sugar in the normal range.
- Blood sugar only begins to rise later, once the pancreas can no longer keep up — this is when pre-diabetes and eventually type 2 diabetes emerge.
This means a patient can feel the effects of insulin resistance — such as fatigue, weight gain, brain fog, or cravings — for years while their doctor’s glucose test shows nothing unusual.
The Right Test to Ask For
- Standard test: Fasting glucose — measures blood sugar levels, misses early insulin resistance.
- Recommended test: Fasting insulin test — directly measures circulating insulin levels.
- If fasting insulin is higher than normal, this confirms insulin resistance is present, regardless of blood sugar readings.
- Dr. Berg recommends patients specifically request this test from their doctor, as it is not part of routine blood work for most people.
Why This Window Matters
The stage where insulin is elevated but glucose is still normal represents a critical intervention window. Catching insulin resistance at this point — before blood sugar dysregulation sets in — allows for earlier lifestyle changes and a better chance of reversing the condition before it progresses further.
Mentioned Concepts
- insulin resistance
- fasting insulin test
- fasting glucose test
- type 2 diabetes
- pre-diabetes
- pancreas
- blood sugar regulation
- ketogenic diet