11 'Sugar-Free' Traps: Foods That Still Spike Blood Glucose Levels

10. Sugar-Free Energy Drinks

These drinks might seem harmless—no sugar, low calories—but the long-term effects are more complicated. High doses of caffeine can increase cortisol, the stress hormone, which negatively impacts insulin sensitivity and blood sugar regulation over time. Pair that with artificial sweeteners like aspartame or sucralose—known to influence gut flora and potentially blunt insulin response—and you’ve got a metabolic disruptor disguised as a performance boost. The jittery energy spike is short-lived, but the hormonal aftermath lingers. If stable energy and glucose control matter to you, hydrate with water, herbal tea, or naturally caffeinated options without sweeteners.