Plantain
Food · Fruit · Food, Typed Supps
Plantains are a starchy cooking fruit — more like a potato than a sweet banana — that's rich in potassium and gut-friendly starch.
Stage by stage
- Chewing Begins (Mouth): Salivary amylase starts breaking down the plantain's digestible starch as you chew, though a portion — especially in unripe fruit — resists this early breakdown.
- Slowed Gastric Emptying (Stomach): The stomach churns the dense pulp; its fiber and starch slow gastric emptying, producing a gradual, steady release of glucose rather than a sharp spike.
- Starch Splits Two Ways (Small Intestine): Digestible starch is broken into glucose and absorbed in the small intestine, while resistant starch and fiber pass largely intact into the colon, where gut bacteria ferment them into short-chain fatty acids.
- Nutrients Circulate (Bloodstream): Potassium, vitamin C, and vitamin B6 enter the bloodstream to support electrolyte balance, collagen production, and nerve function, while fermentation byproducts from resistant starch nourish colon cells and gut microbes.
Timing
Plantain is eaten as a cooked side dish or staple starch rather than a raw snack; it fits alongside any meal, and cooling cooked plantain before eating slightly raises its resistant starch content.
Time to effect
- Hours to weeks: The fiber and resistant starch in plantain promote fullness and a gentler post-meal blood sugar rise within one to two hours of eating, while measurable gut-microbiome changes from regular resistant-starch intake generally take several weeks to develop.
Allergens
None of the fourteen major allergens. Derived from what this food is, not from a product label.
Eating patterns
Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Gluten-free. Depends on the product: Low-FODMAP.
Satiety
142 on the satiety index, where white bread is 100 — moderate. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
0.9 kg CO2e and 115 litres of freshwater per kg, matched to "Bananas" in Poore & Nemecek (2018), Science 360.
Cost band
Cheap — roughly £3 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 122
- Protein: 1.3g
- Carbohydrate: 31.9g
- of which sugars: 15g
- Fat: 0.4g
- of which saturated: 0g
- Fibre: 2.3g
- Sodium: 5mg
Food vs. supplement
Plantain's benefits come from its intact starch-fiber matrix along with its potassium and vitamin C content; no common supplement reproduces that combination, though isolated green plantain or green banana resistant-starch powders are sold separately for gut-health purposes.
Kitchen tip
Boil, bake, or steam plantain rather than deep-frying it, and try cooling cooked plantain before eating to increase its resistant starch content.
Common myth
"Plantains are just bland, starchy bananas, and frying them into tostones or maduros is a light, healthy way to eat them." In reality: Green plantain actually has more potassium and vitamin C per 100 g than a dessert banana, but frying adds substantial fat and calories — often 10-15 g of added fat per serving — so boiling, baking, or steaming preserves far more of plantain's naturally favorable fiber, potassium, and lower-fat profile than deep-frying does.
Recipes that use it
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