
心安診所總院長楊宗衡提醒民眾,看到糖化血色素 HbA1c 報告出現紅字時,不應急於自責,因該數字反映過去二至三個月平均血糖,受近期飲食影響較小,應比較歷史報告並討論適合的追蹤與治療目標。
AI-generated summary
糖化血色素 HbA1c 是反映過去二至三個月平均血糖水平的檢驗項目,常用於評估糖尿病風險與控制情況,其數值解讀需結合個人健康史與歷史報告。
2026/09/24 09:00
心安診所總院長楊宗衡表示,看到「糖化血色素 HbA1c」旁邊出現紅字,先別急著責怪自己。示意圖,圖中人物與新聞無關。(健康網製作;圖取自freepik)
〔健康頻道/綜合報導〕心安診所總院長楊宗衡在臉書粉專「楊宗衡醫師」表示,「醫師,我這幾天已經吃得很清淡,怎麼糖化血色素還是偏高?」
拿到抽血報告,看到「糖化血色素 HbA1c」旁邊出現紅字,先別急著責怪自己。這個數字反映的是過去約二到三個月的平均血糖,最近一個月的影響又比較大;只在抽血前幾天少吃一點,無法代表前幾個月的整體狀況。
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糖化血色素在驗什麼?
血液中的葡萄糖會和紅血球裡的血紅素結合。HbA1c 測量的,就是這類血紅素所占的比例,幫助我們了解一段時間內的血糖狀況。
單驗這一項通常不需要空腹;如果同時安排其他檢查,仍要依照院所指示準備。
報告上的數字怎麼看?
對一般非懷孕成人,常用的判讀範圍是:
● 低於 5.7%:未達糖尿病前期門檻。
● 5.7%~6.4%:屬於糖尿病前期範圍。
● 6.5% 以上:達糖尿病診斷門檻。
如果沒有明確高血糖症狀,單次達到診斷門檻,通常仍需要複驗或另一項檢驗確認。
已經確診糖尿病的人,則要依個人治療目標判讀,不能直接套用上面的範圍,自行認定糖尿病已經消失。
平均值理想,仍要留意血糖起伏
HbA1c 無法完整呈現一天中的高低變化。有些人的平均值接近目標,卻仍可能發生低血糖。
另外,某些貧血、近期大量失血或輸血、腎衰竭等情況,也可能影響準確度。若數字和日常量到的血糖差很多,請把相關病史與紀錄帶回門診討論。
楊宗衡提醒,看到紅字,可以先做一件事:找出上一次的報告,一起帶去回診。
我們要了解數字的變化,也要確認適合你的追蹤與治療目標。把照顧血糖放進平常生活,會比抽血前幾天臨時衝刺更有意義。
楊宗衡說明「糖化血色素 HbA1c」,反映的是過去約二到三個月的平均血糖。(圖取自shutterstock)

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