Quick Facts
- Glycaemic Index (GI) measures how quickly a food raises blood glucose — Low GI (under 55) causes slow, gradual rises; High GI (over 70) causes rapid spikes followed by crashes
- White rice has a GI of 72–80 — one of the highest of any Indian staple. Replacing even one serving daily with millets or dal significantly reduces daily glycaemic load
- Rajma (kidney beans) has a GI of 29 — one of the lowest of any carbohydrate food. The soluble fibre forms a gel that dramatically slows glucose absorption
- Ragi (finger millet) has a GI of 68 — lower than white rice (72–80) and white bread (70+), with far higher fibre, calcium, and iron content
- Adding dal to any meal reduces the glycaemic impact of the entire meal — the soluble fibre and protein from dal blunt the glucose spike from accompanying rice or roti
- Cooking method affects GI significantly — al dente pasta has lower GI than fully cooked; cooled cooked rice has lower GI than freshly cooked hot rice (resistant starch forms)
Understanding Glycaemic Index and Glycaemic Load
Glycaemic Index (GI) — ranks foods by how quickly they raise blood glucose compared to pure glucose (GI=100):
- Low GI: under 55 (gradual glucose rise)
- Medium GI: 55–70
- High GI: above 70 (rapid glucose spike)
Glycaemic Load (GL) — more practically useful than GI alone. Accounts for both the GI of the food AND the quantity consumed:
- GL = (GI × carbohydrate grams) ÷ 100
- Watermelon has a high GI (72) but low GL per serving (because it contains mostly water and a small amount of actual carbohydrate per serving)
Why it matters: High-GI meals → rapid blood glucose spike → insulin surge → rapid blood glucose fall → hunger, fatigue, cravings → repeat. Chronic high-GI eating drives insulin resistance, weight gain, and type 2 diabetes over time.
GI Values of Common Indian Foods
Glycaemic Index of Indian Foods
| Food | GI Value | Category | Practical Swap |
|---|---|---|---|
| Glucose (reference) | 100 | — | — |
| White rice | 72–80 | High GI | Replace half with millets or dal |
| White bread (maida) | 70+ | High GI | Replace with jowar/ragi roti |
| Jowar (sorghum) roti | 55 | Medium GI | Good daily bread alternative |
| Ragi (finger millet) | 68 | Medium-low GI | Lower than rice; more nutritious |
| Bajra (pearl millet) | 54 | Medium GI | Bajra roti for dinner |
| Whole moong dal | 38 | Low GI | Dal at every meal |
| Rajma (kidney beans) | 29 | Low GI | 2× weekly in place of high-GI foods |
| Chana (chickpeas) | 33 | Low GI | Sundal, salad, curry |
| A2 Curd | 36 | Low GI | With every meal as a GI modifier |
Adding curd and dal to any meal significantly reduces the overall glycaemic response, even when rice is included.
The Meal Composition Strategy for Low GI
The GI of individual foods matters less than the GI of the complete meal. Protein, fat, and fibre all lower the glycaemic impact of carbohydrates consumed at the same meal.
Traditional Indian meal (dal + roti + sabzi + curd) is metabolically optimal:
- Dal provides protein + soluble fibre → slows glucose absorption
- Sabzi provides fibre + micronutrients → further blunts spike
- Curd provides protein + fat → delays gastric emptying
- Roti (millet roti even better than wheat) provides carbohydrate — but its spike is blunted by the above
Problematic Indian meal patterns:
- White rice alone (high GI with no modifiers)
- Rice + pickle only (no dal, no protein, no fat)
- Maida-based foods at breakfast (poori, white bread, biscuits) without protein
How to Lower the GI of Your Existing Indian Diet
- Add dal to rice meals — rajma chawal, dal rice reduces the glycaemic response significantly
- Include curd with every meal — protein + fat in curd blunts post-meal glucose
- Replace white rice partially — mix rice with millets; or replace one rice meal with a millet-based meal
- Eat more whole dals and fewer refined carbs — rajma, chana, moong dal are all very low GI
- Cook rice, cool it, then reheat — cooling cooked rice increases resistant starch content, lowering GI
- Soak dals and grains — reduces phytic acid and slightly lowers GI by reducing digestive access to starch
Available at Organic Mandya
Organic Ragi (Finger Millet)
GI of 68 vs white rice at 72–80 — with 11g fibre, 344mg calcium, and 3.9mg iron. The better grain for blood sugar control.
Q Is brown rice significantly better than white rice for blood sugar?
Is brown rice significantly better than white rice for blood sugar?
Brown rice has a GI of approximately 55–65 vs white rice at 72–80 — a meaningful but modest difference. More importantly, brown rice has 3× more fibre, more magnesium, and more B vitamins than white rice. However, the GI difference is not dramatic enough to make brown rice a cure for blood sugar problems — the meal composition matters much more. Dal + brown rice has a lower glycaemic response than brown rice alone. Dal + white rice also has a lower glycaemic response than white rice alone. Replacing white rice with millets (jowar, bajra, ragi) provides even better glycaemic control plus significantly higher nutrient density.
Q Is fruit high GI and should diabetics avoid it?
Is fruit high GI and should diabetics avoid it?
Most whole fruits are low to medium GI — the fibre and water content slow sugar absorption significantly. Guava (GI ~12), berries, apple, pear, and most Indian fruits are low GI. Even banana (GI ~51) and mango (GI ~51) are medium GI when eaten whole with their fibre. The problem with fruit for diabetics is usually juice (removes fibre, concentrates sugar) or eating large quantities. Eating one serving of whole fruit (100g mango, one guava, one small apple) with a meal that includes protein and fat produces a much lower glycaemic response than eating fruit alone. Most diabetics can include 1–2 fruit servings daily without glycaemic problems when eating correctly.
Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or a qualified healthcare provider before making dietary changes, especially if you have a medical condition.