Glycemic Index of Fruits

Most whole fruits sit in the low or medium GI band: guava around 29–33, apple 36–40, orange 40–45, papaya 56–60, ripe mango 51–60. The high band is small — watermelon (~72–76, but a low load per slice) and dried fruits like dates, where removing water concentrates the sugar.

Answered by Dr. Dante Ruskin · Diabetologist & Intensivist

The rules that matter more than any value: eat fruit whole and never as juice, one serving at a time, preferably with or after a meal — and remember ripeness raises GI, which is why a spotted banana behaves differently from a firm one.

The chart

FruitTamil / MalayalamGI (range)BandSensible portion
Amlaநெல்லிக்காய் / നെല്ലിക്കvery low*Low1–2 fruits
Guavaகொய்யா / പേരയ്ക്ക~29–33Low1 fruit, with skin
Appleஆப்பிள்~36–40Low1 medium, with skin
Pomegranateமாதுளை / മാതളം~35–53Low½ cup arils
Orange / mosambiஆரஞ்சு / ഓറഞ്ച്~40–45Low1 medium, segments
Pearபேரிக்காய்~33–42Low1 medium
Banana, just ripeவாழைப்பழம் / വാഴപ്പഴം~48–55Low–Med1 small — full answer
Grapesதிராட்சை / മുന്തിരി~43–59Low–Medsmall measured bowl
Mango, ripeமாம்பழம் / മാമ്പഴം~51–60Medium½ medium fruit
Jackfruit, ripeபலாப்பழம் / ചക്ക~50–60Medium2–3 bulbs — full answer
Papayaபப்பாளி / പപ്പായ~56–60Medium2 small slices — full answer
Pineappleஅன்னாசி / കൈതച്ചക്ക~59–66Medium2 rings
Chikoo / sapotaசப்போட்டா / സപ്പോട്ടhigh-sugar*Med–High1 small, occasional
Banana, very ripe / nendranநேந்திரம் / ഏത്തപ്പഴംrises with ripenessMed–High½ fruit — full answer
Jamun (naval)நாவல் பழம் / ഞാവൽ~25–55*Low–Med10–15 fruits — full answer
Nungu (ice apple)நுங்கு / നൊങ്ക്low load*Low2–3 seeds — full answer
Watermelonதர்பூசணி / തണ്ണിമത്തൻ~72–76High (low load)1 slice
Datesபேரீச்சம்பழம் / ഈത്തപ്പഴം~42–62 by typevaries2–3 dates
Raisins / dried fruitஉலர் திராட்சை~54–64Med (dense)1 small spoon

* limited published data (amla, sapota) — treated by sugar content and clinical experience rather than an invented number.

How to use fruit well with diabetes

The chart chooses between fruits; four habits decide the outcome. Whole, never juiced — juicing strips fibre and concentrates several fruits into one fast glass; this single rule outweighs every value above. One serving at a time — a medium fruit or about a cup, not a mixed bowl that quietly holds four servings. With or after meals — protein and fat already on the plate slow the fruit’s sugar. Season-proof your habits — mango and jackfruit season is when measured portions collapse into daily excess; the best-and-worst fruits guide covers the seasonal strategy in full.

Special situations

Kidney disease changes fruit advice more than diabetes does — banana, orange, chikoo and dates are potassium-rich, and reduced kidney function may require limiting them; ask before fixing a daily habit. Insulin and sulfonylurea users should keep fruit intake consistent day to day so doses match, and should treat a genuine low-sugar episode with plain sugar or glucose, not fruit. Pregnancy carries tighter targets — fruit stays in the plan, portions are set with your doctor.

Diabetes in pregnancy →After the pregnancy →

Frequently asked questions

Among fruits common here, guava (~29–33) leads, with amla effectively minimal, and apple, orange and pear all comfortably low. Guava with its skin adds useful fibre — one of the best routine fruits for anyone with diabetes.

GI measures speed, not amount. Watermelon's sugar arrives fast — but a normal slice is mostly water and carries little total carbohydrate, so its glycemic load is low. One or two slices are fine; a large bowl or juice is not.

Yes, measurably. Ripening converts starch to simple sugars — a firm, just-ripe banana tests near 48–55 while a heavily spotted one moves well above it. Eating fruit slightly firmer is a small habit with a real effect.

Per bite, yes — drying removes water and concentrates sugar, so dates, raisins and dried mango deliver far more carbohydrate per handful than the fresh fruit. Two or three dates is a portion; a handful is a dessert.