Best flour for diabetes: how atta, millets and besan compare

Why there is no single best flour for diabetes

The diagnosis lands on one person, and the atta dabba belongs to the whole house. Someone comes home with a sugar report and a prescription, and by dinner the kitchen is doing the maths: how many rotis, which atta, should it be jowar now, or that multigrain pack the neighbour swears by.

So the honest question is a shopping question: which bag do I buy? The studies answer it sideways, because they test the roti (chapati) as eaten, not the flour.

The glycemic index (GI) ranks a carbohydrate food by how much it raises blood sugar compared with glucose. A score of 55 or less counts as low and 70 or more as high [2].

Here's the catch. The same whole wheat roti has tested anywhere from 45 to 62 depending on who made it and how [1] [2], and glycemic load adds the portion in. Two rotis and four rotis from the same atta are not the same meal.

So two things matter more than the name on the bag: the dietary fibre and protein in the flour, and how many rotis you eat with what. People search for a "diabetic friendly flour" as if one were sitting on a shelf. The useful answer is a method, not a brand.

In short: stop looking for one bag. Look at the fibre, the roti count and what is in the katori beside it.

What customers tell us

In our survey of our own buyers, 59% said someone at home keeps an eye on blood sugar [6]. Of those who named a food style, 31% said vegetarian and 20% said high protein, which is the besan-and-dal end of the comparison further down [6].

Wheat flour for diabetes: atta against maida

Start with the flour already in most Indian kitchens. Whole wheat atta is a reasonable everyday flour if you have diabetes, provided the bran stays in. That last clause is the whole story, because atta and maida come from the same wheat; the difference is what the mill takes out.

The numbers make the case. Atta carries 11.4 g of fibre per 100 g; maida, with the bran and germ milled away, carries 2.8 g [4]. Protein is close to equal, 10.6 g against 10.4 g, but maida ends up with more digestible carbohydrate, 74.3 g against 64.2 g per 100 g of flour [4].

Milled rice keeps maida company at 2.8 g of fibre per 100 g raw; rice flour itself is not listed [4]. As roti, whole wheat sits in the low to medium band you saw above. We found no verified GI for a maida roti, and we have not guessed one.

The chokar (bran) is where most of the fibre lives. So buy whole atta, or ask your chakki to keep the bran in, and do not sieve it out because the roti looks softer without it. Keep maida and white rice for occasions; the everyday roti is where the change pays off.

Low GI wheat flour: there is no such bag

You will see packs sold as low GI wheat flour. GI belongs to the food as eaten, not to the bag, which is why one roti carries three published values and all three are right.

One Indian test fed whole wheat roti to 18 healthy volunteers and measured 45.1 [1]. Other published values for the same food are 62 ±3 for "wheat roti" and 52 ±4 for "chapatti" [2].

The spread has causes. Whole-grain cereal foods vary widely from one test to the next, and the researchers put it down to manufacturing method, processing, food structure and preparation [7] [3].

One more honest caveat: GI tests are run in healthy volunteers, not in people with diabetes. Across 20 staple foods, the two groups' values moved together (r = 0.94), so the ranking holds even where the exact number does not [2].

What did test lower was a method, not a bag: a roti from the same Indian test, made with an "atta mix" kneaded into the wheat, which we come to below.

In short: read GI as a range, and read the label as a label. A higher-fibre, higher-protein flour kneaded into the atta changes the roti more than any word on the front of the pack.

Low GI atta: millets, besan and barley in Indian studies

This is where the family debate usually goes next: switch to jowar or bajra, because millets are "for sugar". It is a kind instinct, and the numbers are not on its side. Millet atta is not a low GI atta by default.

One Indian test fed traditional foods to 15 healthy adults and measured jowar roti at 84.1, makki roti at 74.8 and bajra roti at 70.1, all high; ragi mudde, the stiff porridge, came in at 98.2 [3]. The researchers' own words: "Merely being a whole grain-based food does not qualify for a lower GI." [3]

Millets still earn a place on your shelf, for their fibre: bajra carries 11.5 g per 100 g of grain, ragi 11.2 g and jowar 10.2 g [4]. Use them to vary the week's grain, knowing that millet rotis are not low GI on their own.

Besan changes the picture because it is not a grain at all. It is ground from Bengal gram dal (chana dal), and that shows: 21.6 g of protein and 15.2 g of fibre per 100 g [4]. Whole chickpea dishes test low; white chickpea sundal scored 24.1 in the same test as the millet rotis [3].

We found no primary study that tested a besan roti, so we give it no GI rather than borrow one from a ranking page.

Barley (jau) has the most fibre of the grains here, 15.6 g per 100 g [4]. Barley grain itself tested at 28 ±2, and we found no test of a barley-flour roti either [2]. Oats show how much processing matters: rolled-oat porridge tested at 55 ±2 and instant oat porridge at 79 ±3 [2].

In short: millets add fibre and variety, besan and barley add the protein and fibre atta lacks, and none of them is a free pass on the roti count.

Almond, coconut and kuttu flour

These turn up in low-carb recipes and vrat cooking, so they belong on the list even though none of them makes a roti. Whole almonds carry 3.0 g of available carbohydrate per 100 g, which is why almond flour appears in low-carb baking; coconut flour is not listed at all [4].

We found no verified GI for either in a primary source, and kuttu (buckwheat), the vrat staple, is unverified too. Use them as baking flours, and read the sugar in the recipe as closely as the flour.

Low GI flour list: GI and fibre of common Indian flours

Now that each flour has had its say, here is the comparison in one place. The lowest glycemic index flour in Indian roti tests is the blended atta; among single flours, whole wheat roti tested lowest.

How to read this table: the GI column is for the food as eaten, with the number of the test it comes from; fibre and protein are per 100 g of the raw flour or grain; where no primary study has tested a flour, the cell says so.

Flour glycemic index as eaten, and fibre and protein per 100 g. Lower GI is gentler. Each number jumps to its source.

Flour	GI as eaten (food tested, source)	Fibre g/100 g [4]	Protein g/100 g [4]
Whole wheat atta	Roti 45.1, India [1]; wheat roti 62 ±3, chapatti 52 ±4 [2]	11.4	10.6
Blended atta (whole wheat + "atta mix")	Roti 27.3 [1]	not listed	not listed
Maida (refined wheat flour)	No verified Indian roti GI	2.8	10.4
Jowar (sorghum)	Roti 84.1 [3]	10.2 (grain)	10.0
Bajra (pearl millet)	Roti 70.1 [3]	11.5 (grain)	11.0
Makki (maize)	Roti 74.8 [3]	12.2 (dry grain)	8.8
Ragi (finger millet)	Mudde (stiff porridge) 98.2, not roti [3]	11.2 (grain)	7.2
Besan (Bengal gram dal)	No verified besan roti GI; whole chickpea sundal 24.1 [3]	15.2 (dal)	21.6
Barley (jau)	Barley grain 28 ±2 [2]; flour roti not verified	15.6 (grain)	10.9
Oats	Rolled-oat porridge 55 ±2; instant 79 ±3 [2]	not listed	not listed
Kuttu (buckwheat)	No verified value	not listed	not listed
Almond flour	No verified value	not listed	not listed
Coconut flour	No verified value	not listed	not listed

The Indian GI values in the table were measured in healthy volunteers [1] [3]; the other values are averages from studies in different laboratories [2].

Best flour for diabetes in India: what ICMR-NIN advises

When a family wants one official answer, the place to look is the ICMR-National Institute of Nutrition, and it names no winner.

Its Dietary Guidelines for Indians (2024) say: "Use a combination of whole grains of cereals, pulses and millets", "Prefer whole grains and millets to refined grains / ultra-processed foods", and "Include more fibre-rich foods such as whole grains, millets, pulses, nuts & vegetables" [5].

The same booklet says: "Sugar should be less than 5% of the total energy per day for adults" [5]. That line belongs on a flour page because a besan ladoo is still mostly decided by its sugar.

Turned into a thali, the advice reads: two rotis made from whole atta or a blend, a katori of dal, a sabzi and a katori of curd. Not a new flour, a fuller plate.

Low GI flour for roti: how to make any roti raise sugar less

You do not need a special low GI flour for roti. The studies above point to five changes you can make with the atta already in your kitchen, starting with tonight's dinner.

Mix your atta with a higher-fibre flour

The clearest lead we have is a single tested blend: an "atta mix" kneaded into whole wheat flour took the roti's GI from 45.1 to 27.3 [1]. The published summary does not say what was in the mix, so we cannot hand you the recipe [1].

Two flours from the comparison above have the most to add, besan for protein and fibre and barley for fibre [4]. The official advice above points the same way.

Keep the bran

The fibre gap you saw between atta and maida is the whole case. Buy whole atta, or ask the chakki to keep the bran, and leave the sieve in the drawer.

Count the rotis, not only the flour

Glycemic load is GI multiplied by the grams of carbohydrate in the portion, divided by 100. In the millet tests above, about 105 to 116 g of cooked millet or maize roti carried 50 g of carbohydrate [3]. A fourth roti adds a fourth portion of carbohydrate whatever the flour.

If you take insulin or tablets for diabetes, talk to your doctor before you change your roti count.

Eat roti with dal, sabzi and curd

The researchers behind the millet tests note that low-GI legume accompaniments, which in our kitchens means dal, may favourably change the blood sugar response to a high-GI staple [3]. So the roti eaten with a katori of dal is a different meal from the roti eaten dry with achaar. Methi paratha, a mixed roti, tested medium at 60.2 [3].

Check your own response

GI values are averages from healthy volunteers, and nobody eats as an average. A glucometer reading of your post-meal blood sugar, at the time your doctor suggests, shows how your body answers a particular roti. Ask your doctor what reading to aim for, and change one thing at a time so you know what moved it.

Cheat sheet

• Buy whole atta: keep the chokar; 11.4 g of fibre per 100 g against 2.8 g in maida [4].
• Blend it: knead besan or barley flour into the atta for more fibre and protein [4]; one tested "atta mix" blend, recipe unpublished, took roti GI from 45.1 to 27.3 [1].
• Do not count on millets alone: jowar, bajra and makki rotis tested 70 to 84 [3].
• Count the rotis: two carry half the carbohydrate of four, whatever the flour.
• Serve with dal: the researchers behind the millet tests say low-GI legumes beside a high-GI staple may help [3].

Baking and sweets with these flours

Besan ladoo, almond-flour cake and oat cookies all start with a flour from the table above, and in sweets the sugar in the recipe decides as much as the flour does. A ladoo does not become a different food because the besan is good; the two katoris of sugar still go in.

Of the buyers who told us where their sweetener goes, 15% said baking and 14% said Indian sweets [6]. Keep the flour you chose, and check how much sugar the recipe asks for.

Commercial disclosure: The Sweet Change makes and sells Monk Fruit Drops. The flour and roti sections on this page are written from the studies cited and do not depend on any product.

The short version for your kitchen

The best flour for diabetes turns out to be a method: whole atta with its bran, a higher-fibre flour kneaded in, two rotis rather than four, and dal beside them. Every figure here points to its source, and where none exists we have said so.