Understanding the Glycemic Index (GI): A Guide for Food Industry Consultants and Nutrition-Focused Manufacturers

The Glycemic Index (GI) is a scientifically developed ranking system that classifies carbohydrate-containing foods based on how they affect blood sugar levels. Developed in the 1980s by Dr. David Jenkins, the GI uses pure glucose as a reference (GI value = 100) to measure the relative rise in blood glucose after food consumption.

Below are six of the best low-GI foods

1. Oats – 55

A staple in health food processing, oats are rich in beta-glucan—a beneficial fiber.

Rolled and steel-cut oats are preferred over quick oats due to lower GI values.
Used widely in ready-to-eat cereals and muesli blends.

2. Milk – 37 to 39

A low-GI dairy option, milk supports functional beverage formulation.

Skimmed milk: GI 37 | Full-fat milk: GI 39
Soy milk (varies between 17–44 GI) is an excellent plant-based alternative.

3. Carrots – 39

Rich in beta-carotene and antioxidants, carrots are great for health-focused food products.

Ideal for snacks, side dishes, or vegetable-based dips.

4. Kidney beans – 24

High in protein and fiber, kidney beans are perfect for vegetarian and vegan product lines.

Applications: canned meals, bean pastes, chilis.

5. Lentils – 32

A favorite in ethnic food consulting, lentils are essential for Indian dishes like Dal.

High in protein, fiber, phosphorus, and potassium.

Many factors influence a food’s GI score, including:

Processing level: More processed = higher GI
Ripeness: Riper fruits = higher GI
Cooking method: Intense heat = higher GI
Acidic dressings: e.g., lemon can lower GI
Starch type: Amylose (lower GI) vs. Amylopectin

Non-Carbohydrate Foods for Low-GI Diets

Foods that do not contain carbohydrates can be included freely in low-GI meal planning:

Meat, eggs, fish, seafood
Olive oil, butter, herbs, spices
Nuts and seeds

Conclusion

Whether you're a food processing consultant, a nutrition-focused food manufacturer, or part of a food business consultancy, leveraging the glycemic index can guide smarter product formulation, better consumer health outcomes, and enhanced product marketability.

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Below are six of the best low-GI foods

Many factors influence a food’s GI score, including:

Non-Carbohydrate Foods for Low-GI Diets

Conclusion