Glucose spikes, dawn effects, reactive lows — your blood sugar tells a story about how your body processes food. Understanding these patterns is the key to personalized nutrition that actually works for your biology.
A glucose spike is a rapid rise in blood sugar after eating. While some rise is normal, large or frequent spikes stress your metabolic system, cause energy crashes, and over time contribute to insulin resistance. The dawn effect — a natural glucose rise in early morning — and reactive hypoglycemia — a crash after a spike — are common patterns worth understanding.
Late meals often cause elevated overnight glucose that disrupts deep sleep. Tracking the correlation between your last meal time and sleep quality reveals your personal cutoff window.
Exercise can temporarily spike glucose (especially intense efforts) before improving insulin sensitivity for hours afterward. Understanding this pattern prevents unnecessary alarm about post-workout readings.
Your morning fasting glucose reflects overnight metabolic health. Tracking trends over weeks and months provides a powerful window into insulin sensitivity and metabolic function.
The same food can cause dramatically different glucose responses in different people. Genetics, gut microbiome, sleep quality, stress levels, and even the order you eat foods all play a role. That’s why population-based nutrition advice often fails — and why tracking your own glucose responses with Fulcra’s annotations and AI analysis gives you an edge no generic diet plan can match.
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