Author: MAI Medical Information Team · Reviewed: 2026-04-14 · Sources: WHO, UpToDate, PubMed

Blood Sugar Levels: Normal Range, Diabetes Signs & Prevention

Creator: MAI by AZORA
Published: 2026-04-14

Updated: April 14, 2026 | Reading time: 6 min.

Blood glucose (sugar) is one of the most critical health markers. High blood sugar can indicate diabetes or prediabetes — conditions affecting over 530 million people worldwide.

Important: If you suspect diabetes, consult your doctor for proper diagnosis and treatment.

Blood Sugar Normal Ranges

Test	Normal	Prediabetes	Diabetes	Unit
Fasting glucose	70–99	100–125	≥126	mg/dL
2h post-meal	<140	140–199	≥200	mg/dL
HbA1c	<5.7%	5.7–6.4%	≥6.5%	%

Diabetes Warning Signs

Increased thirst
Frequent urination
Unexplained weight loss
Fatigue and weakness
Blurred vision
Slow wound healing
Tingling in hands or feet

What Is HbA1c?

HbA1c (glycated hemoglobin) shows your average blood sugar over the past 2-3 months. It's the most reliable long-term indicator of blood sugar control and is used to diagnose and monitor diabetes.

How to Manage Blood Sugar Naturally

Balanced diet — fewer simple carbs, more fiber and protein
Regular exercise — 30 minutes daily reduces insulin resistance
Weight management — losing 5-7% of body weight can reverse prediabetes
Regular testing — fasting glucose and HbA1c at least once a year
Stress management — stress hormones raise blood sugar levels
Adequate sleep — poor sleep increases insulin resistance

MAI Tip: Upload your glucose and HbA1c results to MAI — our AI will explain your numbers and give personalized recommendations.

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⚠️ Important: This article is for informational purposes only and does not constitute medical advice. Always consult your doctor before making health decisions.
Sources: World Health Organization (WHO), UpToDate Clinical Reference, PubMed Medical Research Database.

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