What the evidence says. Early or small human trials; promising but not yet conclusive.
Nutrition per serving 1 medium fruit (50 g edible)
Water39 g78%
Sugars9 g18%
Fibre1 g2%
Other carbs0.5 g1%
Protein0.3 g1%
Fat0.2 g0%
What's in one serving, by weight — average composition (USDA).One serving as % of the adult daily requirement (FDA Daily Values). The bold outer ring = 100% of a day's needs.
Salak (Snake Fruit) (Salacca zalacca) is a fruit used for antioxidant capacity (high polyphenol content; strong dpph/abts radical scavenging in pulp and peel, in vitro). NutriDex grades the human evidence as Preliminary. Salak is an Indonesian palm fruit whose health reputation rests almost entirely on laboratory and animal data rather than human trials. Pulp and especially peel are rich in phenolic acids (chlorogenic, caffeic, ferulic) and organic acids, giving strong in vitro antioxidant (DPPH/ABTS) and antimicrobial activity. Fruit and seed extracts inhibit alpha-glucosidase and intestinal glucose uptake in vitro and lower blood glucose in obese-diabetic and STZ-nicotinamide rodent models, supporting the traditional antidiabetic use, but no human glycemic trial exists. The single registered human RCT (n=71) tested a snake-fruit-infused massage oil with Thai massage and found no overall skin benefit over plain coconut oil, with elasticity and melanin improvements attributable to the massage itself. Popular memory-fruit and anti-cancer claims are extrapolations from nutrient content with no clinical confirmation. As a whole food it is a reasonable low-fat source of fiber, potassium and vitamin C, but evidence for specific disease benefits in people remains preliminary. Composition also varies substantially by cultivar (e.g. Pondoh, Bali, Gading).
Purported Benefits
✓Antioxidant capacity (high polyphenol content; strong DPPH/ABTS radical scavenging in pulp and peel, in vitro)
✓Possible postprandial glucose control via alpha-glucosidase inhibition and reduced intestinal glucose uptake (in vitro and rodent studies only)
✓Traditional antidiabetic use with supporting rodent blood-glucose and metabolomic data, but no human glycemic trial
✓Whole-food source of dietary fiber/pectin and potassium for digestive and vascular support
✓Antimicrobial phenolic acids (chlorogenic, caffeic, ferulic) concentrated in peel and pulp, in vitro
✓Skin/anti-aging activity in UV-stressed human fibroblasts; the one human RCT (massage oil) showed no benefit beyond plain coconut oil
Dosing & Compounds
Typical Dose
1-3 fresh fruits (~50-150 g edible flesh) as a snack; no established therapeutic dose for extracts
Active Compounds
Phenolic acids — chlorogenic acid, caffeic acid, ferulic acid, coumaric acidFlavonoids and condensed tannins (proanthocyanidins)Organic acids — malic acid (dominant), plus citric acidVitamin C (ascorbic acid)Carotenoids — including beta-caroteneDietary fiber and pectinMinerals — potassium, calcium, iron, phosphorusB vitamins — thiamin, riboflavin, niacin
Safety & Cautions
⚠
Generally safe as a food. High tannin and fiber content and astringency may contribute to constipation if eaten in large amounts; the cut flesh oxidizes and browns quickly due to a membrane-bound polyphenoloxidase. Antidiabetic extract activity is unproven in humans — do not substitute for diabetes medication, and people on glucose-lowering drugs should monitor for additive effects if consuming concentrated extracts. No USDA Daily Value-grade composition exists (the fruit is absent from USDA FoodData Central); nutrient figures derive from the Indonesian Food Composition Table (TKPI/DKBM) and vary by cultivar, so the listed %DV values are approximate. Educational only — always check with your doctor or pharmacist before combining Salak (Snake Fruit) with any medicine.
Salak (Snake Fruit) is most often taken for Antioxidant capacity (high polyphenol content; strong DPPH/ABTS radical scavenging in pulp and peel, in vitro), Possible postprandial glucose control via alpha-glucosidase inhibition and reduced intestinal glucose uptake (in vitro and rodent studies only), Traditional antidiabetic use with supporting rodent blood-glucose and metabolomic data, but no human glycemic trial, Whole-food source of dietary fiber/pectin and potassium for digestive and vascular support. Scaly Indonesian palm fruit rich in polyphenols
Does Salak (Snake Fruit) work — what does the evidence say?
Preliminary evidence. Early or small human trials; promising but not yet conclusive. Salak is an Indonesian palm fruit whose health reputation rests almost entirely on laboratory and animal data rather than human trials. Pulp and especially peel are rich in phenolic acids (chlorogenic, caffeic, ferulic) and organic acids, giving strong in vitro antioxidant (DPPH/ABTS) and antimicrobial activity. Fruit and seed extracts inhibit alpha-glucosidase and intestinal glucose uptake in vitro and lower blood glucose in obese-diabetic and STZ-nicotinamide rodent models, supporting the traditional antidiabetic use, but no human glycemic trial exists. The single registered human RCT (n=71) tested a snake-fruit-infused massage oil with Thai massage and found no overall skin benefit over plain coconut oil, with elasticity and melanin improvements attributable to the massage itself. Popular memory-fruit and anti-cancer claims are extrapolations from nutrient content with no clinical confirmation. As a whole food it is a reasonable low-fat source of fiber, potassium and vitamin C, but evidence for specific disease benefits in people remains preliminary. Composition also varies substantially by cultivar (e.g. Pondoh, Bali, Gading).
What is the typical dose of Salak (Snake Fruit)?
1-3 fresh fruits (~50-150 g edible flesh) as a snack; no established therapeutic dose for extracts
Is Salak (Snake Fruit) safe? Any cautions or side effects?
Generally safe as a food. High tannin and fiber content and astringency may contribute to constipation if eaten in large amounts; the cut flesh oxidizes and browns quickly due to a membrane-bound polyphenoloxidase. Antidiabetic extract activity is unproven in humans — do not substitute for diabetes medication, and people on glucose-lowering drugs should monitor for additive effects if consuming concentrated extracts. No USDA Daily Value-grade composition exists (the fruit is absent from USDA FoodData Central); nutrient figures derive from the Indonesian Food Composition Table (TKPI/DKBM) and vary by cultivar, so the listed %DV values are approximate.
How many studies support Salak (Snake Fruit)?
NutriDex cites 10 sources for Salak (Snake Fruit), graded "Preliminary".
Cite this page
APA
Peh, D. (2026). Salak (Snake Fruit) (Salacca zalacca): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 16 Sept 2026, from https://nutridex.info/s/salak
BibTeX
@misc{nutridex_salak,
author = {Peh, Daryl},
title = {Salak (Snake Fruit) (Salacca zalacca): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/salak},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-09-16}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.