Does Coca Cola Zero Spike Blood Sugar? CGM Test

Curious how Coca Cola Zero affects blood glucose? I tested it using my CGM. This drink contains no sugar, carbs, or calories — and the results showed it. My blood sugar actually dropped slightly from 5.4 to 5.0 mmol/L, a 7% decrease. No spike at all, just a minor dip. While this confirms Coca Cola Zero doesn’t raise blood sugar, it’s still a processed beverage with no nutritional value. I prefer keeping these as rare treats, and when I want something bubbly, I often go for sparkling water with lemon instead.

Metabolic Health Insights 🔬

Coca Cola Zero, like other zero-calorie artificially sweetened beverages, typically doesn’t raise postprandial glucose levels due to the absence of carbs and sugars. For those managing insulin resistance, metabolic syndrome, or aiming to reduce blood sugar variability, this might seem like a safe choice. However, artificial sweeteners can affect gut microbiota, appetite signaling, and long-term metabolic health. Using a CGM to validate the short-term blood sugar response is helpful, but it’s also wise to consider overall dietary quality and frequency of consumption. Occasional use? Fine. Daily habit? Maybe rethink it.