Formulated bar, MARS SNACKFOOD US, SNICKERS MARATHON Double Chocolate Nut Bar & Diabetes
High glycemic impact — occasional choice only. Glycemic load of 21.4 per 100g.
✅ Nutrition data verified · GL 21.4/100g · GI 51.9 · TIER 3 ⚠️ GI: Subcategory Estimate
GI estimated from food subcategory average — not directly tested on this food. [1] [3]
How This Food Affects Blood Sugar
Key Nutrition Data
How It Stacks Up in Its Family
On glycemic load, this version lands mid-range: 21.4 per 100g, inside a family spread of 16.1 to 33.9 per 100g. For sugar, this one sits in the middle of its Formulated bar family: 22.7 per 100g against a 15.2-33.4 per 100g spread.
Verdicts split across the family: the gentlest option is SOUTH BEACH protein bar (GL 16.1) and the heaviest is SNICKERS MARATHON Double Chocolate Nut Bar (GL 21.4); this one is limit. Within this Formulated bar family (14 versions), GL per 100g spans 16.1 to 33.9 — the processing and fat content decide where each lands. Compare directly with Chocolate, COCOAVIA, NUTZ OVER CHOCOLATE.
More Snacks to Compare
Alternatives to Consider
🍿 Snacks, pork skins, barbecue-flavor
GL 0.8/100g — Low GL
Rated diabetes-friendly — lower glycemic impact than your current selection.
Snacks, pork skins, barbecue-flavor & diabetes →🍿 Snacks, beef sticks, smoked
GL 2.8/100g — Low GL
Rated diabetes-friendly — lower glycemic impact than your current selection.
Snacks, beef sticks, smoked & diabetes →🍿 Snacks, beef jerky, chopped and formed
GL 4.8/100g — Low GL
Fiber 1.8g/100g. Rated diabetes-friendly — lower glycemic impact than your current selection.
Snacks, beef jerky, chopped and formed & diabetes →🍿 Formulated Bar, SOUTH BEACH protein bar
GL 16.1/100g — Moderate
Fiber 7.3g/100g. Lower glycemic impact than your current selection.
Formulated Bar, SOUTH BEACH protein bar & diabetes →Practical Tips
💡 Half Portion, Full Satisfaction
A half serving significantly reduces the glycemic load. Use it as a side, not the main event, and bulk up your plate with vegetables.
💡 Check Your Own Response
Individual blood sugar responses vary. Use a glucose meter to understand how this food affects you personally.
💡 Glycemic Load Over Glycemic Index
GL accounts for both the speed AND amount of carbohydrate, making it more practical for real-world eating than GI alone.
💡 Pair Carbs With Protein
Adding protein to a carbohydrate-containing meal slows digestion and helps prevent blood sugar spikes.
Glycemic Load by Serving Size
| Portion | Weight | Carbs | Glycemic Load | Verdict |
|---|---|---|---|---|
| ½ Serving | 40g | 20.7g | 8.6 | Friendly |
| Standard Serving | 80g | 41.3g | 17.1 | Moderate |
| Restaurant Portion | 160g | 82.7g | 34.2 | High |
GL ≤10 = Low (Friendly) · 11–19 = Moderate · ≥20 = High (Limit).
The page-level verdict is based on GL per 100g; this table shows how portion size changes the actual GL you get.
Quick Answers
Is Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... good for diabetes?
Unfortunately, Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... has a high glycemic load of 21.4. This means it can spike blood sugar quickly. The good news: there are often great lower-GL alternatives.
Where does Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... sit on the glycemic load scale?
Per 100g, Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... has a GL of 21.4. This means one standard serving (80g) provides approximately 17.1 GL — which is high.
Does Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... spike blood sugar?
After eating Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double..., you can expect a high blood sugar response. The GL of 21.4 means a significant spike. This can vary based on what else you eat with it.
Is the GI value accurate?
The GI of 51.9 for Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... is estimated (Tier 3), not directly ISO-tested on this specific food. It is based on the weighted average GI of foods in the Snacks category from the International GI Tables (Atkinson et al., 2021). Actual GI may vary by variety, ripeness, cooking method, and individual response. We display estimated values with full transparency so you can make informed decisions.
Can portion control make this food work?
Yes — half a standard serving of Formulated bar MARS SNACKFOOD US SNICKERS MARATHON Double... reduces the glycemic load substantially. At GL 21.4 per 100g this is a dense source, but a half portion makes a meaningful difference. The key is mindfulness: use it as a side dish, not the main event, and fill most of your plate with non-starchy vegetables and lean protein.
Data Sources
Data Tier: TIER 3 — estimated from category average
Glycemic Index (GI): 51.9 — subcategory_avg:Snacks. Source: International GI Tables (Atkinson, Brand-Miller et al., Diabetes Care, 2021). University of Sydney GI Research Service.
GL (per serving, 80.0g) = 21.4 × 80.0 ÷ 100 = 17.1
Nutrition Data: USDA FoodData Central, SR Legacy Release (April 2018). FDC ID: 173132. Data are in the public domain (CC0 1.0).
GL Classification: ≤10 = Low (Low GL), 11–19 = Moderate (Eat in Moderation), ≥20 = High (Limit). Based on University of Sydney Glycemic Index Foundation classification.
⚠️ GI value is estimated, not directly ISO-tested on this specific food. Actual GI may vary by variety, cooking method, and individual glycemic response.
Cite this page: GlycemicWise. “Formulated bar, MARS SNACKFOOD US, SNICKERS MARATHON Double Chocolate Nut Bar — Glycemic Load & Diabetes Reference.” GlycemicWise, July 2026. https://glycemicwise.com/foods/formulated-bar-mars-snackfood-us-snickers-marathon-double-chocolate-nut-bar/
Dietary reference — not medical advice. This page provides evidence-based dietary reference information for general educational purposes. It is not a substitute for professional medical advice, diagnosis, or treatment. Individual blood sugar responses vary significantly. Always check your blood glucose to understand your personal response to foods, and talk to your doctor or a registered dietitian before changing your diet. Data sources are cited above and publicly available from the USDA and the University of Sydney Glycemic Index Research Service.