Does Pepsi Zero Affect Blood Sugar? CGM Test

Ever wondered how Pepsi Zero impacts your blood sugar? I tested it with my CGM by drinking a 330ml can. The label says it contains zero sugar and zero carbs — and the data backs it up. My glucose barely moved, going from 5.1 to 5.2 mmol/L after an hour. That’s just a 2% increase — well within the healthy range. While this shows Pepsi Zero doesn’t spike glucose, it’s still a processed drink with artificial sweeteners, so I treat it as an occasional option rather than a daily habit.

Metabolic Health Insights 🔬

This test demonstrates how zero-calorie sweetened beverages like Pepsi Zero typically don’t cause postprandial glucose spikes, making them a potentially safer choice for those managing blood sugar. For individuals with insulin resistance or anyone aiming for glucose stability, using a CGM reveals how certain “zero sugar” drinks might fit into a low-glycemic lifestyle. That said, artificial sweeteners may influence gut microbiota, cravings, and insulin signaling over time, even without immediate glucose effects. The key is moderation — they can be tools, not staples, for metabolic flexibility and diabetes prevention.