Durian

Durian (Durio zibethinus L.): A Comprehensive Reference

1. Identity and Botanical Classification

1.1 Taxonomic Identity

Durio zibethinus Murr. is an energy-dense seasonal tropical fruit grown in Southeast Asia. It belongs to the family Bombacaceae (now often reclassified within Malvaceae), genus Durio, and is cultivated across Southeast Asian countries including Malaysia, Thailand, Indonesia, and the Philippines. It is revered as the "King of Fruit," distinguished by its potent and unique aroma, formidable spiny husk, and intense flavor. Native to Southeast Asia, its diversity center is located on the island of Borneo in Indonesia.

There are nine edible Durio species: D. lowianus, D. graveolens Becc., D. kutejensis Becc., D. oxleyanus Griff., D. testudinarum Becc., D. grandiflorus (Mast.) Kosterm. ET Soeg., D. dulcis Becc., Durio sp., and D. zibethinus. However, only Durio zibethinus has been extensively grown and harvested commercially.

1.2 Common Names and Nomenclature

The name "durian" derives from the Malay word duri, meaning thorn or spike, referring to the fruit's formidable spiky husk. It is known as "durian" across the Malay-speaking world, "thuren" in Thai, and "sầu riêng" in Vietnamese. It is widely referred to as the "King of Fruit" throughout Southeast Asia.

1.3 Botanical Structure and Physical Description

The durian fruit encompasses all of its components, including the pulp, peel, and seed. Renowned for its substantial size, potent aroma, and formidable spiky husk, it can weigh over 10 kg. It has a creamy texture and a sweet-bitter taste. The unique durian flavour is attributable to the presence of fat, sugar, and volatile compounds such as esters and sulphur-containing compounds including thioacetals, thioesters, and thiolanes, as well as alcohols.

1.4 Cultivars

In Southeast Asia, durian has been cultivated for centuries at the village level, probably since the late 18th century, and commercially since the mid-20th century. There are 15 varieties of durian registered under the Malaysian Department of Agriculture (DOA), including D24, D99 (kob kecil), D123 (Chanee), D145 (Beserah), D159 (Mon Thong), D197 (Raja Kunyit, Musang King), and D199 (Bola 828), among others. In Thailand, the Thai Agricultural Standard (TAS 3-2013) has reported seven commercial varieties of durian.

1.5 Common Forms and Preparations

The flesh can be consumed at various stages of ripeness, and it is used to flavour a wide variety of sweet desserts and savoury dishes in Southeast Asian cuisines. The seeds can be eaten when cooked. It is usually eaten raw or included as a main ingredient in desserts, porridges, fritters, cakes, and ice creams. In addition to fresh consumption, durian is commercially available as frozen pulp, freeze-dried powder, chips, paste, and as an ingredient in confectionery, ice cream, and canned products. A traditional fermented form, known as tempoyak, is prepared from the flesh and is consumed as a condiment across Malaysia and Indonesia.

2. Traditional and Historical Use

2.1 Culinary and Cultural History

Durian is not only used as fresh fruit and processed food, but also as a traditional folk medicine in Southeast Asia. It has been cultivated in Southeast Asia at the village level for centuries, probably since the late 18th century. Since the early 1990s, domestic and international demand for durian in the ASEAN region has increased significantly, and in the early 2020s a durian craze in China led to a large increase in international trade of the fruit.

2.2 Traditional Medicinal Uses by Region

Traditionally, in Asia, durian leaf and root decoctions have been believed to show antipyretic effects and have been used as a febrifuge and anti-malarial agent. They are also used to treat phlegm, relieve colds, and treat skin diseases, jaundice, and swellings.

In Malaysia and China, the decoction of the leaves and roots is used for antipyretic, expectorant, and cold relief; peel ash can be used to treat infant fever. In Malaysia, the leaf juice is applied locally to the head of fever patients.

Traditional prescriptions include mixing and boiling the leaves of Hibiscus rosa-sinensis, Nephelium longan, Durio zibethinus, Nephelium mutabile, and Artocarpus integrifolia to make poultices, or boiled decoctions of the roots of these species for fever patients.

The juice from the bark is used as an antimalarial in Sumatra. The Javanese also believe that durian has aphrodisiac properties. In addition, durian leaves are considered anthelmintic and are used for jaundice treatment. Decoctions of the leaves and fruits are used to treat swelling and skin conditions.

Southeast Asian folk believe that the fruit is an aphrodisiac and can be used as an abortifacient, improving menstruation and treating infertility.

Traditional Chinese medicine believes that durian shells have the effects of clearing heat and purging fire, nourishing yin and moisturizing dryness. Therefore, durian shell is often used as a pharmaceutical food in Chinese folk practice to assist in treating diseases.

Southeast Asian traditional beliefs, as well as traditional Chinese food therapy, consider the durian fruit to have warming properties liable to cause excessive sweating.

3. Nutritional Composition

3.1 Macronutrients

Durian is rich in macronutrients (sugars and fat) and micronutrients (potassium), dietary fibre, and bioactive and volatile compounds. An intake of one serving size of durian aril (155 g) contributes 130 to 253 kcal. The energy content of durian is the highest compared with other tropical fruits such as mango, jackfruit, papaya, and pineapple.

According to USDA FoodData Central data for raw durian flesh, per 100 g: durian contains approximately 147 calories, 1.48 g of protein, 27.08 g of carbohydrates, 5.35 g of fat, and 3.79 g of fiber. The carbohydrate content varies between different durian varieties, ranging from 15.65 to 34.65 g per 100 g fresh weight. The USDA food composition data reports approximately 27.09 g per 100 g fresh weight.

The total sugar content in different durian cultivars ranges from 3.10 to 19.97 g/100 g fresh weight. Among the sugars present in durian pulp, sucrose is the most abundant, ranging from 5.57 to 17.89 g/100 g fresh weight, followed by glucose, fructose, and maltose.

All durian varieties contain a considerable amount of dietary fibre (7.5–9.1 g/100 g dry matter) and high amounts of carbohydrate and sugar (62.9–70.7 g and 47.9–56.4 g/100 g dry matter respectively). Most varieties had monounsaturated fatty acids (MUFA) greater than saturated fatty acids (SFA) greater than polyunsaturated fatty acids (PUFA).

3.2 Micronutrients

Durian is particularly rich in thiamin (B1) at 31% of the daily value per 100 g, vitamin C at 22%, copper at 23%, and vitamin B6 at 19%. It also contains meaningful amounts of riboflavin, niacin, folate, potassium, and manganese.

Per 100 g, durian contains: calcium (6 mg), potassium (436 mg), magnesium (30 mg), phosphorus (39 mg), and sodium (2 mg). It also provides small to moderate amounts of vitamin A (2 mcg RAE), niacin/B3 (1 mg), and folate/B9 (36 mcg) per 100 g.

A study in Plant Foods for Human Nutrition specifically highlighted certain durian cultivars as "superior folate sources," with some varieties containing higher folate levels than commonly recognized folate-rich fruits. Potassium at 436 mg per 100 g places durian in the same league as bananas (358 mg per 100 g).

3.3 Glycemic Index

In humans, Robert et al. (2008) showed that durian had the lowest glycaemic index (GI = 49) compared with watermelon (GI = 55), papaya (GI = 58), and pineapple (GI = 90). The low GI value for durian may be due to the presence of fibre and fat.

4. Key Constituents and Active Compounds

4.1 Volatile Sulphur Compounds

The major volatile compounds identified in Malaysian, Thai, and Indonesian durian varieties include esters (ethyl propanoate, methyl-2-methylbutanoate, propyl propanoate), sulphurs (diethyl disulphide, diethyl trisulphide, and ethanethiol), thioacetals (1-(methylthio)-propane), thioesters (1-(methylthio)-ethane), thiolanes (3,5-dimethyl-1,2,4-trithiolane isomers), and alcohol (ethanol). These volatile sulphur compounds are primarily responsible for durian's characteristic powerful odour.

4.2 Polyphenols and Flavonoids

Durian is rich in flavonoids (including flavanols and anthocyanins), ascorbic acid, and carotenoids. The polyphenol and flavonoid contents of durian are in the range of 21.44 to 374.30 mg GAE and 1.90 to 93.90 mg CE per 100 g fresh weight. The mechanism of action of polyphenols strongly relates to their antioxidant activity.

Total polyphenols, flavonoids, flavanols, ascorbic acid, tannins, and antioxidant activity (as determined by CUPRAC, DPPH, ABTS, and FRAP assays) differed significantly among immature, mature, ripe, and overripe durian samples. The content of polyphenols and antioxidant activity were highest in overripe durian, flavonoids were highest in ripe durian, and flavanols and antiproliferative activity were highest in mature durian.

4.3 Gamma-Glutamylcysteine (γ-EC)

The fruit's pulp is rich in gamma-glutamylcysteine, a precursor to the essential antioxidant glutathione. Laboratory work supports antioxidant and anti-inflammatory actions and highlights a novel angle — the presence of γ-glutamylcysteine that can raise intracellular glutathione in human cell models under oxidative stress.

4.4 Peel Phytochemicals

Chemical constituents isolated from the durian shell include phenolic acids, phenolic glycosides, flavonoids, coumarins, triterpenes, simple glycosides, and other compounds. The peel of Durio zibethinus contains phytochemicals with potential antifungal properties, such as alkaloids, flavonoids, saponins, quinones, tannins, and terpenoids.

Detailed studies have shown that active secondary metabolites such as polyphenols, alkaloids, terpenoids, and glycosides isolated from various parts of the plant (fruit, leaves, peel, seed, and root) possess a wide range of significant therapeutic activities.

4.5 Carotenoids

The Kob-ta-kam variety showed greater potential for health benefits in terms of carotenoids and β-carotene (2248 μg and 1202 μg/100 g dry matter, respectively). Carotenoid content varies considerably by cultivar and stage of ripeness.

4.6 Procyanidins (Flowers)

Dual-platform metabolomic analysis of durian flowers annotated polyphenols including (−)-epicatechin, procyanidins B1, B2, and C1. An 80% (v/v) ethanol extraction of durian flowers yielded a crude extract with a total procyanidin content of 7.68 mg/g. Bioactivity assays revealed that the procyanidin-rich crude extract reduced oxidative stress and exhibited anti-inflammatory effects against UVA in human keratinocytes (HaCaT).

4.7 Fatty Acids

The health properties of durian are based not only on the antioxidant properties, but also on its fatty acid composition. The seed fat has been documented to contain stearic, palmitic, palmitoleic, and oleic acids as major fatty acid constituents.

5. Mechanisms of Action

5.1 Antioxidant Activity

In vitro and in vivo studies using primarily ethanol, methanol, acetone, hexane, ethyl acetate, and aqueous methanol extracts have confirmed the potential to reduce oxidative stress by exhibiting a potent antioxidant effect via free radical scavenging. Durian is rich in macronutrients and bioactive polyphenols and hence possesses strong in vitro antioxidant capacity.

5.2 Anti-inflammatory Activity

Modern pharmacological studies show that the durian shell has many pharmacological activities, such as antioxidant and anti-inflammatory effects, and regulation of glucose and lipid metabolism. Anti-inflammatory activity has been tested by measuring anti-nitric oxide (NO) production in LPS-stimulated Raw 264.7 macrophage cells. The Monthong peel extract had the lowest IC₅₀ against NO production, indicating the highest anti-NO production activity.

5.3 Glutathione Precursor Activity

The gamma-glutamylcysteine present in durian pulp serves as a direct precursor to glutathione, one of the body's primary endogenous antioxidants. Laboratory work confirms that γ-glutamylcysteine can raise intracellular glutathione in human cell models under oxidative stress. This mechanism is distinct from, and potentially complementary to, the direct free-radical-scavenging activity of polyphenols.

5.4 Aldehyde Dehydrogenase Inhibition

The scientific basis of the adverse, or at times lethal, effect of ingesting durian while imbibing alcohol has not been fully established. Symptoms are reminiscent of the disulfiram–ethanol reaction (DER) arising from the inhibition of aldehyde dehydrogenase (ALDH). Cognizant of the inhibitory effect of sulphur compounds like disulfiram on ALDH and the rich sulphur content of durian, the influence of durian fruit extract on ALDH-mediated oxidative metabolism of acetaldehyde has been investigated. A dose-dependent inhibition of yeast ALDH (yALDH), at most 70% at 0.33 ppm (mg extract/L assay mix), by dichloromethane:pentane extracts has been reported.

6. Scientific Evidence by Area of Use

6.1 Antioxidant and Anti-inflammatory Effects

Evidence grade: Predominantly in vitro; no rigorous human clinical trials.

Flour extracts from the unripe pulp, inner peel, and seed of two durian varieties (Monthong and Chanee) were analyzed for total phenolic content (TPC), antioxidant capacity, and anti-inflammatory capacity. Chanee pulp contained a higher TPC (5285.37 ± 517.65 mg GAE/g) than Monthong pulp, Monthong peel, Monthong seed, Chanee peel, and Chanee seed.

The antioxidant activity of each durian extract was determined against ABTS, nitric oxide, superoxide, hydroxyl, and metal ions. Results indicated that the pulp, inner peel, and seed of these durian varieties had antioxidant capacities. These are in vitro results and their direct relevance to human physiology requires further clinical study.

6.2 Cardiovascular Health and Blood Lipids

Evidence grade: Animal models and limited human studies; no large-scale clinical trials.

In vivo studies showed that diets supplemented with ripe and, to a lesser degree, mature and overripe durian significantly hindered the rise in plasma lipids and in plasma antioxidant activity. In a rat study, nitrogen retention in the cholesterol/ripe group was significantly higher (63.6%, p < 0.05) than in other diet groups and the level of plasma glucose remained normal.

Experimental animal models have shown that durian beneficially reduces blood glucose and cholesterol levels. Animal studies have reported reductions in blood lipids when durian was added to high-cholesterol diets. These animal models suggest potential lipid benefits and protective effects in high-cholesterol diets, although large, high-quality human trials are not yet available.

6.3 Blood Pressure and Heart Rate Effects

Evidence grade: One small controlled human study; overall evidence weak.

One study investigated the correlation between durian intake and the elevation of blood pressure and heart rate in healthy males. Subjects consumed either placebo, 250 g, or 500 g of durian flesh. Blood pressure and heart rate were measured at various intervals up to 24 h. Both systolic and diastolic blood pressure remained normal for groups given durian; however, a significant increase in heart rate was observed in the group given 500 g of durian at 0.5–2 h. This was attributed to the sugar content, as diets rich in carbohydrate have been associated with the elevation of blood pressure. The study was small, used only healthy males, and did not measure blood glucose levels, limiting its generalizability.

Based on a literature review, consumption of durian in a small amount does not affect blood pressure, though patients with hypertension must be careful in consuming durian in large amounts.

6.4 Blood Glucose and Glycemic Response

Evidence grade: One small human study for glycemic index; animal data for anti-hyperglycemic effects; no clinical trials on diabetic populations.

Durian is energy-dense due to sugar and fat content and hence might contribute to daily energy intake and increase postprandial blood glucose. However, supplementation of 5% freeze-dried Monthong (Thailand variety) in 1% cholesterol-enriched diets in rats for 30 days did not raise the plasma glucose level compared with the control diet.

The glycemic index of durian (approximately 49, low GI) suggests a gentler post-meal glucose rise than many fruits. That said, glycemic load matters: a larger portion can still contribute substantial carbohydrate. Moderate servings (e.g., 100 g) tend to produce a modest glycemic load (~13).

A registered clinical trial (NCT06121817) by the Singapore Institute of Food and Biotechnology Innovation is investigating the thermogenic effect and metabolic responses of durian, including the effectiveness of durian on the thermic effect of food, blood pressure, heart rate, and postprandial glucose and lipid levels in young healthy men and women, compared to the ingestion of isocaloric banana. This trial had not reported results as of the time of writing.

6.5 Antiproliferative and Anticancer Activity

Evidence grade: In vitro and animal studies only; no human clinical evidence.

Durian extract possesses anti-proliferative effects in in vitro models. In a study examining durian at different ripening stages, flavanols and antiproliferative activity were highest in mature durian (p < 0.05). These findings reflect laboratory results only and cannot be extrapolated to human cancer prevention or treatment without further clinical investigation.

6.6 Antimicrobial Activity

Evidence grade: In vitro studies only.

Extracts of durian exhibit significant antimicrobial activity against a wide range of pathogenic microorganisms, including Gram-negative bacteria such as P. aeruginosa and E. coli, in vitro.

The durian peel (Durio zibethinus Murray) contains significant bioactive compounds with antifungal properties. The aim of one study was to determine the antifungal activity of D. zibethinus fruit peel extract against C. albicans by analyzing the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). This was a preliminary in vitro study and does not constitute clinical evidence.

6.7 Probiotic and Gut Health Effects

Evidence grade: In vitro and fermented product studies only.

Ahmad et al. (2018) isolated Lactobacillus plantarum from Tempoyak and showed good probiotic properties including acid and bile salt tolerance, antioxidative and antiproliferative effects, and remarkable adhesion on colon adenocarcinoma cell lines (HT-29). Lactic-fermented durian products (such as tempoyak) harbor probiotic candidates in laboratory assays. These findings are hypothesis-generating and not clinical evidence.

6.8 Overall Evidence Summary

Currently, there are limited studies exploring the health benefits of bioactive components in durian. The effects observed in animal and in vitro models warrant further investigation in human interventional studies for the development of functional food. Few trials have tested durian intake against hard endpoints (blood pressure, HbA1c, lipids) in humans.

7. Body Systems and Health Areas Associated with Durian

• Cardiovascular system: Experimental animal models have shown that durian beneficially reduces blood glucose and cholesterol levels. The low glycemic index may benefit cardiometabolic health, though human trial data are very limited.
• Immune and oxidative stress: Durian is rich in bioactive polyphenols and possesses strong in vitro antioxidant capacity. Gamma-glutamylcysteine may support endogenous antioxidant (glutathione) production.
• Gastrointestinal system: Durian's fiber (about 3–4 g per 100 g; ~9 g per cup) supports digestive regularity and may promote fullness. Fermented durian (tempoyak) has demonstrated probiotic potential in vitro.
• Metabolic and endocrine: A low GI (~49) combined with significant fat and fiber content moderates postprandial glucose response relative to many other tropical fruits.
• Dermatological (traditional): Traditionally, durian preparations are used to treat skin diseases, jaundice, and swellings.
• Infectious disease (traditional/in vitro): Durian leaf and root decoctions have been used as a febrifuge and anti-malarial agent. In vitro antimicrobial and antifungal activities have been documented in peel and seed extracts.

8. Dosage Forms and Doses Reported in Studies

There is no standardized therapeutic dosage for durian as a dietary supplement. The following doses are drawn directly from reported research:

• Fresh pulp, cardiovascular/blood pressure study: Subjects consumed either placebo, 250 g, or 500 g of durian flesh. Both systolic and diastolic blood pressure remained normal for groups given durian, though a significant increase in heart rate was observed at 500 g at 0.5–2 h.
• Freeze-dried powder, animal (cholesterol) study: Supplementation of 5% freeze-dried Monthong variety in 1% cholesterol-enriched diets in rats for 30 days did not raise the plasma glucose level compared with the control diet.
• One serving of aril: An intake of one serving size of durian aril (155 g) contributes 130 to 253 kcal.
• In vitro ALDH inhibition study: Dose-dependent inhibition of yeast ALDH was reported at most 70% at 0.33 ppm (mg extract/L assay mix) by dichloromethane:pentane extracts.
• Peel extract, antifungal study: A post-test only control group experiment was conducted using a 70% ethanol maceration extract of D. zibethinus peel to assess MIC and MBC against C. albicans.

9. Safety Considerations and Interactions

9.1 Durian and Alcohol: ALDH Inhibition

Anecdotal accounts on the interaction of durian with ethanol suggest an unsafe combination. Reports on the adverse effects, which include cardiac episodes or deaths, in patients drinking alcohol with durian persist. The symptoms have been described as being very unpleasant with clinical manifestations such as facial flushing, palpitation, drowsiness, vomiting, and nausea.

Similar effects have been associated with alcohol aversion therapy using disulfiram (tetraethylthiuram disulfide), a sulphur-containing drug. Disulfiram is known to inhibit aldehyde dehydrogenase (ALDH), causing the accumulation of alcohol-derived acetaldehyde.

Sulphur-rich TLC fruit extract fractions that eluted farthest from the origin effected the greatest inhibitory action. A yALDH assay using diethyl disulfide as an internal standard further supports the role of durian's sulphury constituents in the fruit's ALDH-inhibiting property.

A study in mice given homogenized durian fruit flesh in 10% ethanol did not demonstrate any toxicity; however, evidence that conclusively links concurrent administration of ethanol and durian with disulfiram-ethanol reaction-like effects has yet to be fully presented in human controlled studies. The overall weight of available evidence — case reports, in vitro ALDH inhibition data, and historical adverse event reports — supports avoiding concurrent consumption of durian and alcohol.

9.2 High Caloric and Sugar Load

Durian is energy-dense due to sugar and fat content and hence might contribute to daily energy intake and will also increase postprandial blood glucose. Durian's high sugar and fat content means it might contribute substantially to daily energy intake and may increase postprandial blood glucose. Individuals managing diabetes or obesity-related conditions should account for portion size.

9.3 Warming Properties and Traditional Cautions

Southeast Asian traditional beliefs, as well as traditional Chinese food therapy, consider the durian fruit to have warming properties liable to cause excessive sweating. These traditional cautions have not been systematically evaluated in clinical trials but reflect centuries of empirical observation.

9.4 Elevated Heart Rate at High Doses

A significant increase in heart rate was observed in the group given 500 g of durian at 0.5–2 h, which may be attributed to the sugar content, as diets rich in carbohydrate have been associated with elevation of heart rate. This effect was not observed with the 250 g dose in healthy males.

9.5 Limitations of Current Evidence Base

Limited studies exist regarding the variation in bioactive and volatile components of different durian varieties from Malaysia, Thailand, and Indonesia. Durian is rich in bioactive polyphenols and hence possesses strong in vitro antioxidant capacity. However, the bioactivity of these polyphenols in animal or human studies is still scarce and needs further investigation. The information obtained from in vitro studies is useful for researchers to explore more durian varieties in Southeast Asia to find bioactive compounds that might be novel nutraceuticals for antioxidant, anti-inflammation, and therapeutic functional food, but extrapolation to clinical recommendations is premature.

References

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