Blog

The science of food and glucose, explained simply.

Does Coconut Water Spike Your Blood Sugar?

Coconut water has a low glycemic index (GI 16–35) but contains 11–15g of sugar per cup. It spikes less than fruit juice but significantly more than plain water.

Does Coffee Affect Your Blood Sugar?

Black coffee has zero glucose, but caffeine temporarily increases insulin resistance by 15–25%, making your next meal spike higher. Decaf does not have this effect.

Does Corn Spike Your Blood Sugar?

Corn has a moderate glycemic index (GI 52–60) when eaten on the cob, but corn-based products like cornflakes (GI 81) and corn tortillas (GI 70) spike much more.

Does Dark Chocolate Spike Your Blood Sugar?

Dark chocolate (70%+ cacao) has a low glycemic index (GI 23) and minimal blood sugar impact. A 1-oz serving contains only 7g of sugar. Milk chocolate (GI 42) spikes significantly more.

Does Dried Fruit Spike Your Blood Sugar?

Dried fruit has a moderate-to-high glycemic index and 3-5x the sugar density of fresh fruit. Dates (GI 42-55), raisins (GI 64), and dried cranberries (GI 62) are concentrated sugar sources.

Does Fasting Lower Your Blood Sugar?

Fasting lowers blood sugar by depleting liver glycogen and forcing the body to use fat for fuel. Intermittent fasting (16:8) can reduce fasting glucose by 10-20 mg/dL.

Does Fiber Lower Your Blood Sugar?

Soluble fiber reduces blood sugar spikes by 20-30% by forming a gel that slows glucose absorption. You need 25-30g daily, but most Americans get only 15g.

Does Fruit Spike Your Blood Sugar?

Most whole fruits cause a low-to-moderate blood sugar spike. Berries (GI 25–40) spike the least. Tropical fruits like pineapple (GI 66) and watermelon (GI 76) spike the most.

Does Granola Spike Your Blood Sugar?

Granola has a moderate glycemic index (GI 55–70) but is calorie-dense with 30–45g of carbs per half cup. Many brands contain 10–15g of added sugar per serving, hidden behind health marketing.

Does Greek Yogurt Spike Your Blood Sugar?

Plain Greek yogurt has a low glycemic index (GI 11–22) and contains only 4–6g of sugar per serving. Its high protein and low carb content makes it one of the best dairy choices for blood sugar.