Peanuts for diabetes: GI, portion and how to eat them

As a snack, yes: moongfali is good for diabetes in the sense that plain groundnuts ask very little of your blood sugar. The glycemic index of peanuts is 11 — the mean of five published tests in the University of Sydney database, far inside the low band, which ends at 55. A full 100 g carries 17.27 g of carbohydrate against 10.38 g of fibre and 39.63 g of fat per 100 g.

The honest limits sit in the same numbers. Groundnuts carry 521 kcal per 100 g, and a 2020 meta-analysis of 13 randomised controlled trials found no significant effect on fasting blood sugar. So moongfali for diabetes patients is a swap-in snack, nothing more: it replaces a higher-carbohydrate bite without adding much sugar to the day.

The composition numbers for raw groundnuts, per 100 g: 521 kcal of energy, 39.63 g of fat, 23.65 g of protein, 17.27 g of carbohydrates, 10.38 g of fibre, 3.44 mg of iron, 54 mg of calcium, 197 mg of magnesium, 679 mg of potassium and 90.87 mcg of folate. For blood sugar, the pair that matters first is carbohydrate against fibre; for the day's energy count, it is the fat.

In the University of Sydney database, the glycemic index of peanuts is 11: the mean of five tests, with a range of 5 to 23. Two of the five come from the Philippines, on groundnuts soaked overnight, boiled, cooled overnight and microwaved; one from South Africa, on crushed peanuts; one from Canada and one from Mexico, on plain peanuts. None of the five was run in India. Whichever way, the band is the same: anything up to 55 rates low and anything from 70 rates high, so 11 sits firmly low. For scale: the GI test feeds people a portion carrying 50 g of available carbohydrate, and 100 g of groundnuts holds 17.27 g of carbohydrate in total, so a real portion is far smaller than what the test feeds.

Per 100 g raw, edible portion. Composition: IFCT 2017 (ICMR-NIN). GI: University of Sydney GI database. — means not reported. These are average values for the food; the label on a pack gives the values for that product.

Jafari Azad and colleagues pooled 13 randomised controlled trials in a 2020 review and found no significant effect of peanuts on fasting blood sugar (weighted mean difference 0.57 mg/dl, P = 0.604) or on serum insulin. The same review reported no significant effect on weight, blood pressure, LDL cholesterol, triglycerides or total cholesterol — and one significant positive: HDL cholesterol rose by 2.72 mg/dl (P = 0.001). Read plainly, the trials did not show groundnuts lowering blood sugar; they showed groundnuts neutral.

The guideline side agrees. ICMR-NIN's dietary guidelines count nuts among the foods whose adequate fibre intake helps keep blood glucose, insulin, cholesterol and triglycerides level, and the same guidelines describe what fibre does — it holds back the uptake of carbohydrates and fats and stretches the feeling of fullness. Fibre is the mechanism that matters here: a slower carbohydrate ride, not a lower reading.

Count out 30 g of raw groundnuts a day and stop there: 156 kcal, 11.9 g of fat, 7.1 g of protein, 5.2 g of carbs and 3.1 g of fibre. ICMR-NIN's My Plate for the Day, for a vegetarian adult, allows 35 g a day for nuts and seeds together, so one 30 g handful nearly fills that group and leaves little room for a second nut.

The form matters as much as the measure. ICMR-NIN says that boiling peanuts raises their antioxidant concentration up to four times more than raw or roasted peanuts, and a 2016 review notes that roasting and boiling both lift the nut's bioactive compounds. Eat them plain, skins on where they stay on, as a mid-meal handful or beside the meal itself. Buying and keeping them is covered on the groundnut hub page.

From the plainest to the sweetest, here is the order. Boiled groundnuts — soaked overnight, boiled and cooled overnight — are the form behind two of the five GI database tests. Plain dry-roasted peanuts come next; the masala peanuts recipe roasts them on the stovetop with no frying, in a light besan and spice coat with a little salt and oil, and moongfali chutney brings the nut to meals with cumin, dry red chilli and tamarind. A raw 30 g handful is fine too — the same nut, nothing added.

Then come the sweetened versions. Peanut chikki melts jaggery to the hard-crack stage around roasted peanuts — 150 g of jaggery to 140 g of peanuts, 169 kcal a two-square serving — and added sugar is exactly what a diabetes snack should not centre on. Moongfali laddu is jaggery-sweetened as well. Salted and oil-roasted packs add sodium and extra oil to a nut that already carries 39.63 g of fat per 100 g; the peanut nutrition per 100 g page carries the full table.

Keep three things out of the bowl. First, the sweetened forms — chikki, laddu and coated 'honey-roasted' packs — whose added sugar a diabetes plan should count like any other sugar. Second, the salted and fried versions: the nut itself holds 12.21 mg of sodium per 100 g and 39.63 g of fat, and the fried pack only adds to both. Third, the free-pour habit — a full 1 cup of groundnuts is 140 g, 729 kcal and 55.5 g of fat, a whole meal's energy eaten as a snack. Check the pack label for added sugar and salt before buying; the ICMR guidelines ask exactly that. The same portion maths, aimed at dieting, sits on the peanuts for weight loss page.

Nothing on this page changes medical advice. Portions here are general: ICMR-NIN's 35 g a day for nuts and seeds is a population-level plate, not your prescription, and the trial numbers above do not justify changing your medication. If you take medicines for diabetes, do not change a dose or a meal plan because of a snack. If groundnuts become part of your daily routine, talk to your doctor or dietitian first — hold the 30 g measure while you do.

What is the glycemic index of peanuts?

Eleven — the mean of five published tests in the University of Sydney GI database, and those five readings ranged from 5 to 23. A glycemic index of 55 or below is the low band and 70 or above is high, so groundnuts sit firmly low. None of the five tests was run in India.

Can peanuts increase cholesterol?

Not in the trials so far. The 2020 review — 13 randomised controlled trials — found total cholesterol, LDL and triglycerides all statistically flat, with one marker moving the good way: HDL rose by 2.72 mg/dl (P = 0.001). A 2016 review adds that peanuts contain phytosterols, resveratrol and phenolic acids, compounds it describes as blocking cholesterol absorption from the diet.

Does moongfali have protein?

Yes — a 30 g handful carries 7.1 g of protein, from 23.65 g per 100 g. A 2016 review notes the peanut carries all twenty amino acids, with the highest amount of arginine.

Why peanuts are bad for you?

Plain peanuts are not bad; the problems come attached. Salted and oil-roasted packs add sodium and fat to a nut that already carries 39.63 g of fat per 100 g, jaggery-sweetened versions add sugar, and a full cup is 729 kcal. Eaten plain and measured, none of that applies.

Which peanuts are best?

For diabetes, the plainest ones: boiled — soaked overnight, then boiled and cooled — or dry-roasted with nothing on them. The form matters more than the variety — the salted, fried and jaggery-coated packs are the ones to skip, whatever the variety.

Is moongfali good for health?

As part of a varied diet, yes — protein, fibre, magnesium and a low glycemic index come in the same small nut, which is why moongfali for diabetic patients means the plain, measured kind in place of a sweeter snack. Trials found no significant effect on fasting blood sugar, so the value is in the swap, not in a number on a glucometer.