Glycemic Index of Coca-Cola

Glycemic load by portion size

Glycemic load = (GI × available carbs in grams) ÷ 100. The same food can produce a low GL in a small serving and a high GL in a large one. Here\'s the calculation across realistic portions:

What this means for blood sugar

With a GI of 63, coca-cola produces moderate glucose absorption. Most adults will see a post-meal glucose rise of 30–55 mg/dL above baseline at 60 minutes for the typical serving.

For people with prediabetes, type 2 diabetes, or insulin resistance — and for non-diabetic adults wearing CGMs to track metabolic health — the practical strategy is pairing. Adding protein and vegetables before the carb portion of a meal reduces the glucose spike by 29% on average (Shukla 2015 Diabetes Care). Adding 10g of viscous fiber or 10–15g of fat blunts the peak by 20–40%. These pairing strategies allow most foods to fit in a glucose-conscious eating plan, even high-GI ones in controlled portions.

Comparing this to other foods

Reference points from the 2021 International Tables for context:

• Glucose — GI 100 (the reference point)
• White bread — GI 73 (high)
• White rice — GI 73 (high)
• Sweet potato — GI 44 (low-medium)
• Lentils — GI 32 (low)
• Whole milk — GI 27 (low)
• Eggs / meat / fish — effectively zero (minimal carbs)

Use the calculators

• Glycemic Load Calculator — compute GL for any food serving
• A1C ↔ eAG Converter — translate average glucose to A1C
• HOMA-IR Calculator — insulin resistance detection
• Net Carbs Calculator — for keto and T1D insulin dosing
• Full calorie breakdown for Coca-Cola

Glycemic index of related foods

Frequently asked questions

What is the glycemic index of coca-cola?

The glycemic index of coca-cola is approximately 63, classifying it as medium GI. Moderate glucose response; portion control matters. GI values are sourced from the 2021 International Tables of Glycemic Index and Glycemic Load (Atkinson, Brand-Miller et al., Diabetes Care 2021) — the canonical reference for over 4,000 foods.

Does coca-cola spike blood sugar?

For a 1 can (12 oz / 355ml), the glycemic load is approximately 25 — classified as high. GL captures the total blood glucose impact better than GI alone because it accounts for actual carb mass in a realistic serving. Most adults will see a meaningful glucose spike from this portion size; consider pairing with protein, fat, or fiber to blunt the response.

What's the difference between glycemic index and glycemic load?

Glycemic index measures how fast a standardized 50g dose of carbs from a specific food raises blood glucose vs pure glucose. Glycemic load multiplies GI by the actual carb content in a realistic serving and divides by 100. GI tells you carb quality; GL tells you the total blood-glucose impact of what you actually eat. Watermelon has GI 72 (high) but GL only 4 per typical serving because most of its weight is water. For practical meal planning, GL is the more useful metric.

How can I lower the glucose response without removing this food?

Three reliable methods. First, eat protein and vegetables 15 minutes before the carbs — Shukla 2015 in Diabetes Care showed this reduces post-meal glucose by 29% with no change in food composition. Second, add 10–15g of fat (olive oil, nuts, avocado) to slow gastric emptying and blunt the peak by 20–40%. Third, add 10g of viscous fiber (oat beta-glucan, psyllium, chia) — slows carbohydrate absorption. Adding 1 Tbsp vinegar to dressings reduces post-meal glucose by 30% in insulin-sensitive subjects (Östman 2005).