A mango is a relative of the cashew, the pistachio and poison ivy. They all belong to one plant family, Anacardiaceae, and many of its members make urushiols, the oily compounds behind the poison ivy rash. In mango, a genome study found the genes thought to build these compounds more active in the peel than in the flesh, which fits with reports of rashes from handling the fruit.
Mango is sweet, and the numbers show it: about 13.7 g of sugar per 100 g, or 22.5 g in a cup of pieces (165 g). It still has a glycemic index of 48, which counts as low, and a cup gives 99 calories and 60 mg of vitamin C, 67% of the daily value. In a trial of 38 healthy adults, fresh mango puree measured 42.7 on the same scale.
Mango research has a clear pattern. Most human trials are small and short, many ran in the US with funding from the National Mango Board, the industry body that promotes mango, and several used freeze-dried mango powder instead of fruit. Treat the results as early signs. One pilot even found a limit: over 16 weeks, 85 g of mango a day went with fewer deep wrinkles in postmenopausal women, while 250 g a day went with more.
Health benefits of mango
The top findings from 25 studies, strongest evidence first
What the stars mean
- Strong. Several randomized trials, pooled in a meta-analysis, point the same way, or regulators (FDA or EFSA) have approved the claim.
- Moderate. Good randomized trials support it, but there are fewer of them, or their results vary.
- Limited. Small, short or single trials, or mixed results. Promising, but it needs confirmation.
Population and lab studies get no stars: they show a link or a mechanism, not proof.
How we rate evidence →- ★★Better blood sugar markers in overweight adultsA daily 100 kcal serving of fresh mango for 12 weeks lowered blood glucose and CRP, an inflammation marker. In a 4-week trial, insulin resistance was lower (HOMA-IR 2.28 against 4.67), but fasting glucose was not.
- ★★More beta-carotene in children’s bloodIn young Gambian children, 75 g of dried mango, 5 days a week for 4 months, raised blood beta-carotene. Blood vitamin A rose only when the mango came with a little fat, and only slightly.
- ★Lower blood sugar in prediabetes and diabetesIn adults with prediabetes, about 300 g of mango a day for 24 weeks lowered fasting blood glucose compared with a granola bar. In type 2 diabetes, 250 g a day for 8 weeks cut HbA1c (average blood sugar) by 0.2 to 0.6 points; bread raised it 0.3.
- ★Eased constipation in a pilot trialIn adults with chronic constipation, 300 g of mango a day for 4 weeks improved constipation symptoms more than the same amount of fiber. The authors call for larger studies.
- ★Smaller blood sugar rise than low-fat cookiesIn 23 overweight and obese adults, a 100 kcal snack of fresh mango raised blood glucose less than low-fat cookies, and mango lowered hunger. It tested a single snack, not long-term eating.
All 25 studies, strongest evidence first
A daily 100 kcal serving of fresh mango for 12 weeks lowered blood glucose and the inflammation marker CRP in overweight and obese adults
Crossover trial in 27 people with a body mass index of 26 or more, who ate 100 kcal a day of fresh mango or low-fat cookies with the same calories, 12 weeks each, with a 4-week break between. Body weight, body fat, blood pressure, insulin and blood fats did not change on mango, while weight, insulin, CRP and triglycerides rose on the cookies. The National Mango Board funded the trial.
Eating 1 cup of mango twice a day for 4 weeks gave a lower insulin resistance score (HOMA-IR 2.28 against 4.67) than a control product in adults with overweight and low-grade inflammation
Parallel randomized trial in 48 adults who completed it. Fasting insulin was lower with mango (8.2 against 15.3 µIU/mL, a borderline result), but fasting glucose and the inflammation markers IL-6, TNF-alpha and hs-CRP did not differ. Several authors have received research grants from the National Mango Board.
75 g of dried mango, 5 days a week for 4 months, raised blood beta-carotene in young Gambian children
Randomized trial in 176 children aged 2 to 7, in four groups: dried mango, dried mango with 5 g of fat, a vitamin A capsule or placebo. Blood vitamin A (retinol) rose in the mango-with-fat group and the capsule group, but not with mango alone, and the rises were small. Dried mango with a little fat was suggested as one way to help prevent vitamin A shortage.
A daily avocado plus 1 cup of mango for 8 weeks improved artery function (flow-mediated dilation) in adults with prediabetes
Partly controlled feeding trial in 82 adults. Flow-mediated dilation rose about 1% on the avocado-mango diet and fell on the control diet, and diastolic blood pressure was lower, mostly in men. Most other markers did not differ, and the effect cannot be split between the two fruits. The authors have received research funding from the Hass Avocado Board and the National Mango Board.
A systematic review of 28 studies found glucose-lowering effects of mango in animals and people, though the effect in people was modest
The authors searched six databases up to December 2020 and screened 1001 studies. The 28 that qualified covered leaves, flesh, seed kernel, peel and stem bark. Human studies were few, used mango flesh almost exclusively and showed modest blood glucose effects, and the authors call for more trials.
About 300 g of mango a day for 24 weeks lowered fasting blood glucose and improved insulin sensitivity in adults with prediabetes, compared with a granola bar
Randomized trial in which 23 people finished (11 on mango, 12 on a granola bar with the same calories). HbA1c stayed stable on mango and rose on the granola bar, and fat-free mass increased. The study was small, and the National Mango Board provided funding.
250 g a day of mango instead of bread at breakfast for 8 weeks lowered HbA1c by 0.2 to 0.6 points in type 2 diabetes, while it rose 0.3 on bread
Randomized trial in 35 people with type 2 diabetes: 10 on Safeda mango, 10 on Dasheri mango and 15 on bread, within a calorie-restricted diet. Fasting glucose, insulin resistance, weight and waist size also improved against bread, and HDL cholesterol rose. It was small, and the comparison was with bread.
Three Indian mango varieties raised blood sugar no more than white bread in people with and without type 2 diabetes
Pilot study of 95 people, 45 with type 2 diabetes and 50 without. Safeda, Dasheri and Langra mangoes were compared with bread and glucose in a tolerance test, then in 3 days of continuous glucose monitoring. Most differences were not statistically significant, but daily swings in blood sugar were smaller after mango than after bread in type 2 diabetes.
A 100 kcal snack of fresh mango raised blood glucose less than low-fat cookies and left people feeling fuller
Randomized crossover trial in 23 overweight and obese adults. The rise in glucose at 30 minutes and in insulin at 45 minutes was smaller after mango, and mango lowered hunger while the cookies did not reduce the desire to eat. Adiponectin rose after mango only. It tested a single snack, not long-term eating.
Adding mango to a cornflakes breakfast did not raise the blood sugar spike, while added sugar did
Randomized crossover trial in 18 healthy young adults who ate cornflakes alone, with 34 g of added sugar, or with mango. Total blood sugar over 2 hours was higher with both added sugar and added mango than with cornflakes alone, and the gap between mango and sugar only approached significance (p = 0.073). Mango raised fullness ratings, but the snack eaten afterward did not shrink.
10 g a day of freeze-dried mango pulp for 12 weeks lowered fasting glucose by 4.45 mg/dL in men and 3.56 mg/dL in women with obesity
Pilot study in 20 obese adults (11 men and 9 women, aged 20 to 50) who ate ground freeze-dried mango pulp, a powder, not fresh fruit. There was no comparison group, and weight and body composition did not change. A National Mango Board grant supported the study.
50 g of freeze-dried mango pulp added to a high-fat breakfast lowered blood glucose at 1 hour (95.8 against 104.8 mg/dL) but did not change triglycerides
Randomized crossover trial in 24 healthy men aged 18 to 25 who ate a 670 kcal breakfast with or without the mango powder. HDL cholesterol was also higher at 1 hour, while inflammation markers and antioxidant enzymes did not change. It tested a single meal, and a National Mango Board grant supported it.
10 g a day of freeze-dried mango pulp for 12 weeks did not change inflammation markers or blood fats in obese adults
Pilot report in 20 obese adults with a body mass index of 30 to 35, using ground freeze-dried mango pulp, a powder, not fresh fruit, and no comparison group. Diet, physical activity and body measures were unchanged too. A National Mango Board grant supported the study.
300 g of mango a day for 4 weeks improved constipation symptoms more than the same amount of fiber in adults with chronic constipation
Pilot randomized study of mango against an equal amount of fiber. Stool frequency, consistency and shape improved on mango, along with lower endotoxin and interleukin 6 in blood and more valeric acid in stool. The authors call for larger studies. The National Mango Board and the US National Cancer Institute funded the work.
200 to 400 g of mango pulp a day for 8 weeks improved colitis symptom scores and lowered the inflammation marker IL-8 by 16.2% in 10 people with inflammatory bowel disease
Small pilot with no comparison group, taken alongside usual medicines. Two other inflammation markers fell (GRO by 25.0% and GM-CSF by 28.6%), and Lactobacillus bacteria and stool butyric acid rose. It is too small to show a real benefit, and the National Mango Board funded it.
Eating 100 kcal of fresh mango a day for 12 weeks raised gut bacteria diversity at week 4 but did not change bowel habits
Crossover trial in 27 overweight or obese adults who ate mango or low-fat cookies, 12 weeks each with a 4-week break. Mango raised some bacteria and lowered Prevotella copri. Gut permeability proteins and stool frequency, consistency, strain and pain did not differ. The National Mango Board supported the study.
85 g of mango a day for 16 weeks reduced deep wrinkles in postmenopausal women, but 250 g a day made wrinkles worse
Pilot trial in healthy postmenopausal women with fair skin (Fitzpatrick type II or III) who ate 85 or 250 g of Ataulfo mango, with no placebo group. Cheek redness rose with 85 g. The National Mango Board funded the study and supplied the fruit.
330 g of mango a day for 2 weeks did not ease the inflammation that follows a hard cycling session
Randomized crossover trial in 22 cyclists who ate mango or only drank water for 2 weeks, then rode for 2.25 hours. Blood levels of 67 inflammation-related fats rose after the ride in the same pattern in both trials, even though mango-related compounds rose in urine. The National Mango Board funded the study.
Fresh mango puree had a glycemic index of 42.7 in 38 healthy Mexican adults
Randomized crossover trial. Pressure treatment, a way of pasteurizing without heat, lowered the index to 32.7 and blood sugar area under the curve by 20%. It tested healthy people and puree, not whole fruit or people with diabetes.
A mango compound called heptadecadienylresorcinol triggered skin reactions in 5 of 6 people allergic to urushiol, the compound in poison ivy
Patch tests with compounds taken from Philippine mango, on 2 people with mango dermatitis (both reacted) and 6 people with lacquer dermatitis who had reacted to urushiol. It shows the two allergens cross-react, but it is a very small test of skin contact, not of eating.
US adults who ate mango had better diet quality and higher intakes of fiber, vitamin C and potassium
Survey data (NHANES 2001 to 2018) on 449 adult and 291 child mango eaters, against 44,574 adults and 28,257 children who did not eat it. Energy intake did not differ, and among adults only men who ate mango had lower BMI, waist size and weight. It shows a link, not cause. The authors consult for food companies, and the National Mango Board funded the work.
Women of childbearing age and older adults who ate mango had more than 20% higher fiber and vitamin C intakes than those who did not
Survey data (NHANES 1988 to 1994 and 1999 to 2018) on 16,774 women of childbearing age and 18,784 older adults. Diet quality was 16% and 13% higher in mango eaters, and older adults who ate mango had lower protein and vitamin B12 intakes. The authors work for a firm under contract with the National Mango Board.
17 American summer-camp workers who picked mangoes in Israel developed a rash, and all had past contact with poison ivy or oak or lived where they grow
Case series. None of the 17 recalled earlier contact with mango, and none of their Israeli companions who had never met poison ivy or oak got the rash. The authors suggest people allergic to poison ivy or oak may react to mango on first contact. It concerns handling the fruit, not eating the flesh.
Mice fed a high-fat diet with 1% or 10% freeze-dried mango did not gain the extra body fat that the high-fat diet alone caused
Study in mice, not people. After 8 weeks the 1% dose also improved glucose tolerance (about 35% lower blood sugar area under the curve), and insulin resistance fell about as much as with the drug rosiglitazone.
Mice on a high-fat diet with 10% freeze-dried mango kept their Bifidobacteria and Akkermansia gut bacteria and made more short-chain fatty acids
Study in mice, not people, over 12 weeks. Stool acetic and butyric acids were 135% and 133% higher than on the high-fat diet alone. The mice on 10% mango also ended 10% heavier than those on the high-fat diet, so this is about gut bacteria, not weight loss.
Who should be careful with mango
Most people can eat mango freely. Take a little care if one of these applies:
- Poison ivy or poison oak allergy. Mango is in the same plant family, and compounds in its peel can set off a similar rash in people already sensitive to urushiol. It is uncommon and comes from the skin, not the flesh: have someone else peel it or wear gloves, and do not eat the skin.
- Allergy to mango, cashews or pistachios. Mango proteins can cause reactions from an itchy mouth to anaphylaxis, and cross-reactions with other fruits, pollen and seeds are known. Cross-reactions among mango, pistachio and cashew have been reported in allergic children.
- Irritable bowel syndrome. Monash University lists mango among high FODMAP fruits, with excess fructose as its main FODMAP. A small portion may be fine for you, so check the Monash app for current serving sizes.
How to choose, store and eat mango
- Fresh: the form most trials used. 100 kcal a day for 12 weeks lowered blood glucose in 27 overweight adults, and 250 g a day for 8 weeks lowered HbA1c in 35 people with type 2 diabetes.
- Dried: a trial in 176 Gambian children used 75 g of dried mango and found it raised blood beta-carotene. Check the label for added sugar.
- Freeze-dried powder: 10 g a day for 12 weeks lowered fasting glucose in 20 obese adults but did not change inflammation markers. It has no comparison group, so treat it as a hint.
Pick mangos with smooth skin and a sweet smell, not wrinkled or sticky, and judge ripeness by a gentle squeeze, since color varies by variety. Ripen firm fruit at room temperature, in a closed paper bag for about two days to speed it up, and refrigerate peeled or cut mango and eat it within 1 to 2 days. Residues are no reason to skip mango: in USDA tests of 532 mango samples in 2018, 3 had a residue above the legal limit, and the samples were tested with the peel on.
Sources
- Hershko K, Weinberg I, Ingber A. Exploring the mango-poison ivy connection: the riddle of discriminative plant dermatitis. Contact Dermatitis. 2005.
- Oka K, Saito F, Yasuhara T, Sugimoto A. A study of cross-reactions between mango contact allergens and urushiol. Contact Dermatitis. 2004.
- Yoo MJ, Carius BM. Mango dermatitis after urushiol sensitization. Clin Pract Cases Emerg Med. 2019.
- Wang P, Luo Y, Huang J, et al. The genome evolution and domestication of tropical fruit mango. Genome Biol. 2020.
- Zhao J, Camus-Ela M, Zhang L, et al. A comprehensive review on mango allergy: clinical relevance, causative allergens, cross-reactivity, influence of processing techniques, and management strategies. Compr Rev Food Sci Food Saf. 2024.
- Azcona OM, Romero L, Bartolome B, Balboa V, Vila L. Clinical cross-reactivity among mango, pistachio nut, and cashew nut in allergic children. J Allergy Clin Immunol Pract. 2020.
- High and low FODMAP foods. Monash University FODMAP.
- Reintroduction using the diary function. Monash FODMAP blog.
- Mango. Iowa State University Extension and Outreach, Spend Smart. Eat Smart.
- Selecting and storing a mango. National Mango Board.
- Pesticide Data Program annual summary, calendar year 2018. USDA Agricultural Marketing Service.
History of mango
Mango began in the northeast of South Asia, in what is now Bangladesh, northeastern India and Myanmar, and people there have grown it since ancient times. The English word dates from the 16th century. It comes through Malay and Malayalam from Tamil, where māṉ means mango tree and kāy means unripe fruit.
Genome work shows two main groups of mango varieties. Commercial varieties cluster with germplasm from India, while a second group of local varieties comes from Southeast Asia. The Indian group grows one embryo per seed, so many favored types must be grafted to stay true, while the Southeast Asian group grows several.
Traders carried the fruit west. Arab and Persian traders brought mangoes to East Africa in the 9th and 10th centuries, and the 14th-century traveler Ibn Battuta reported them at Mogadishu. The Portuguese spread mangoes from Goa to East and West Africa and on to Brazil in the 16th and 17th centuries. From Brazil they reached the Caribbean and eastern Mexico by the mid to late 18th century, while the Spanish brought mangoes from the Philippines to western Mexico on the Manila galleons.
Mango also has royal fans. The Mughal emperor Akbar, who ruled from 1556 to 1605, is said to have planted an orchard of 100,000 mango trees near Darbhanga in eastern India. Today the mango is the national fruit of India, Pakistan and the Philippines, and the mango tree is the national tree of Bangladesh.
Mangoes reached Florida by 1833, and one Florida seedling went on to shape the market. Tommy Atkins grew from a Haden seed planted around 1922 in Broward County. The Florida Mango Forum turned it down several times in the 1950s, citing unremarkable eating quality and fibrous flesh. But it kept well and survived handling and shipping with little bruising, which made it the main mango in the countries that import them.
Sources
- Mango. Wikipedia.
- Tommy Atkins (mango). Wikipedia.
- Wang P, Luo Y, Huang J, et al. The genome evolution and domestication of tropical fruit mango. Genome Biol. 2020.
Frequently asked questions about mango
Is mango good for you?
For most people, yes. A cup of pieces (165 g) has 99 calories, 60.1 mg of vitamin C (67% of the daily value) and 2.6 g of fiber. In trials, daily mango did not raise body weight and in several lowered fasting glucose, but the studies are small and many were funded by the National Mango Board. In a US survey, people who ate mango had better diet quality, which is a link, not proof.
Is mango good for diabetics?
It can fit, in measured portions. In 35 people with type 2 diabetes, 250 g a day of mango instead of bread at breakfast for 8 weeks lowered HbA1c by 0.2 to 0.6 points, and in a pilot of 95 people mango raised blood sugar no more than white bread. Fresh mango puree had a glycemic index of 42.7 in healthy adults. These studies are small, so check portions with your care team.
Is mango high in sugar?
It is a sweet fruit, with 13.7 g of sugar per 100 g and 22.5 g in a cup (165 g). Its glycemic index is 48, a low score. In 23 overweight adults, 100 kcal of mango raised blood glucose less than the same calories of low-fat cookies, but mango stirred into cornflakes still raised total blood sugar over 2 hours in 18 young adults, so it counts as carbohydrate.
How much mango can you eat a day?
No study sets an ideal amount. Trials used 100 kcal a day (about a cup of pieces), 250 g, about 300 g (one average mango) and 330 g a day, for 2 to 24 weeks. In the skin trial, 85 g a day reduced deep wrinkles and 250 g a day did the opposite. If you watch your blood sugar, a cup is a practical serving to start with.
Is mango good for weight loss?
No study here tested mango as a weight-loss food. In 27 overweight adults, 100 kcal of fresh mango a day for 12 weeks did not change body weight, while the same calories of cookies raised it. Mango has 60 calories and 1.6 g of fiber per 100 g, so it can replace a sweeter snack, but that is a swap, not a proven mango effect.
Does mango help constipation?
It might, but the evidence is one small pilot. In adults with chronic constipation, 300 g of mango a day for 4 weeks improved stool frequency, consistency and shape more than the same amount of fiber. In 27 overweight adults, 100 kcal a day for 12 weeks did not change stool frequency, consistency, strain or pain. A cup has 2.6 g of fiber.
Can you eat mango skin?
Most people leave it, and if you are allergic to poison ivy it is the part to avoid. In a genome study, the genes thought to make urushiol-like compounds were more active in the peel than in the flesh, and 17 camp workers with past poison ivy or oak contact got a rash picking mangoes. No trial here used the skin.
Is mango good for your skin?
Maybe in small amounts, but the evidence is one pilot. In postmenopausal women, 85 g of mango a day for 16 weeks reduced deep wrinkles, while 250 g a day made wrinkles worse and 85 g raised cheek redness. There was no placebo group, and the National Mango Board funded the study.