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The science of food and glucose, explained simply.
Does Sleep Affect Your Blood Sugar?
Poor sleep increases insulin resistance by 25-40% after just one night. Sleeping less than 6 hours raises fasting glucose, increases appetite for carbs, and raises diabetes risk by 28%.
Does Soda Spike Your Blood Sugar?
Regular soda causes one of the fastest and largest blood sugar spikes of any food or drink. A 12-oz can delivers 39g of sugar with a GI of 63, absorbed in minutes.
Does Sourdough Bread Spike Your Blood Sugar?
Sourdough bread (GI 54) spikes blood sugar 25-30% less than regular white bread (GI 75). The lactic acid from fermentation genuinely slows starch digestion.
Does Stevia Affect Your Blood Sugar?
Stevia has a glycemic index of 0 and contains zero calories. It does not spike blood sugar. Some research suggests stevia may modestly improve insulin sensitivity.
Does Stress Raise Your Blood Sugar?
Stress directly raises blood sugar by 20-40 mg/dL through cortisol and adrenaline release, even without eating. Chronic stress impairs insulin sensitivity and increases diabetes risk.
Does Sugar-Free Food Spike Your Blood Sugar?
Sugar-free foods can still spike blood sugar. Sugar alcohols, maltodextrin, and refined starches in 'sugar-free' products often have significant glycemic impact.
Does Sugar Spike Your Blood Sugar?
Not all sugar spikes blood sugar equally. Glucose (GI 100) spikes fastest. Sucrose (GI 65) is moderate. Fructose (GI 19) barely spikes glucose but overloads the liver instead.
Does Tofu Spike Your Blood Sugar?
Tofu has virtually no effect on blood sugar. It contains only 1–3g of carbs per serving, has a glycemic index near 0, and its protein and fat content actually helps reduce spikes from other foods.
Does Vinegar Lower Your Blood Sugar?
Vinegar (1-2 tablespoons before a meal) can reduce blood sugar spikes by 20-35%. The acetic acid slows starch digestion and gastric emptying. The effect is real but modest.
Does Walking After Eating Lower Your Blood Sugar?
A 15-minute walk after meals reduces blood sugar spikes by 20-30%. Walking is more effective than standing, and timing matters — walking within 30 minutes of eating has the greatest effect.