Plantain is used as a starchy cooking staple across Latin America, the Caribbean, Africa, and Southeast Asia, where it serves as a versatile side dish, snack, or main course ingredient. But “plantain” also refers to a completely different plant, a low-growing herb (Plantago major) used in traditional medicine for wound healing and skin irritation. Both are worth knowing about, and this article covers each one.
Plantain as a Cooking Staple
Cooking plantains look like large bananas but behave more like potatoes. They’re starchier, less sweet, and almost always cooked before eating. Green (unripe) plantains are firm and starchy, ideal for frying into chips or mashing into dishes like mofongo or fufu. As they ripen and turn yellow to black, they become sweeter and softer, better suited for caramelizing, baking, or pan-frying into maduros (sweet fried plantains).
One cup of baked yellow plantain (about 139 grams) delivers 215 calories, 58 grams of carbohydrates, 3 grams of fiber, and 663 milligrams of potassium. That potassium content is roughly 14% of the daily recommended intake, making plantains one of the richer fruit sources of this mineral. The same serving provides 23 milligrams of vitamin C, 63 micrograms of vitamin A, and 57 milligrams of magnesium, all with virtually no fat.
Green Plantains and Gut Health
Green plantains are one of the richest natural sources of resistant starch, a type of carbohydrate that passes through your small intestine undigested and feeds beneficial bacteria in your colon. Unripe plantain flour can contain over 50% resistant starch by dry weight. This is significant because resistant starch functions more like fiber than a typical carbohydrate, meaning it doesn’t spike your blood sugar the way regular starch does.
Animal research has shown that supplementing with unripe plantain flour lowers insulin levels and shifts gut bacteria in favorable directions, reducing populations associated with obesity while increasing probiotic species. The flour also appeared to activate metabolic pathways in the liver involved in processing fats and sugars. These findings help explain why green plantains have long been considered a filling, blood-sugar-friendly food in traditional diets, though human clinical trials are still limited.
The practical takeaway: if you’re looking for a lower-glycemic way to eat plantains, choose green ones. Boiling or baking green plantains preserves more resistant starch than deep frying. As plantains ripen, much of that resistant starch converts to simple sugars, which is why ripe plantains taste sweet and behave differently in your body.
The Other Plantain: A Medicinal Herb
Plantago major, commonly called broadleaf plantain, is a small leafy weed found in lawns and fields across North America and Europe. It has no botanical relation to cooking plantains. For centuries, herbalists have crushed its leaves into poultices for cuts, insect bites, and minor skin irritation. Modern research has started to explain why this works.
The leaves contain a mix of active compounds, including plant acids that reduce inflammation and promote tissue repair. Lab studies show that plantain extracts suppress a key inflammatory signal in cells while simultaneously encouraging the growth of fibroblasts, the cells your body uses to rebuild damaged skin. In animal wound-healing studies, plantain extract increased the rate of wound closure, even in subjects with impaired healing from high blood sugar.
Antimicrobial Properties of the Herb
Plantain leaf extract has demonstrated activity against a surprisingly broad range of bacteria and fungi in laboratory testing. A study published in the Brazilian Journal of Pharmaceutical Sciences tested it against several medically important pathogens, including MRSA (methicillin-resistant Staphylococcus aureus), a notoriously difficult-to-treat infection. The extract inhibited growth of both standard and drug-resistant staph strains.
It also showed activity against Candida auris, a fungal pathogen that has become a growing concern in hospitals, and against several species of Sporothrix, fungi that cause skin infections. Perhaps most interesting, when combined with conventional antibiotics, the extract showed synergistic effects against certain drug-resistant bacteria. For example, pairing the extract with standard antibiotics enhanced their effectiveness against carbapenem-resistant Klebsiella pneumoniae and MRSA. These are lab findings, not clinical treatments, but they point to real biological activity beyond folk-remedy placebo effects.
How People Use the Herb Today
Most people who use broadleaf plantain apply it topically. The traditional method is simple: crush fresh leaves and press them against a bug bite, minor scrape, or rash. You can also find dried plantain leaf in herbal salves, teas, and tinctures at health food stores. Some people brew the leaves into tea for mild digestive or respiratory complaints, though the evidence for internal use is thinner than for topical wound healing.
Safety Considerations for the Herb
Broadleaf plantain is generally well tolerated when used topically, but it carries some risks worth knowing about. The plant’s pollen contains proteins that trigger IgE-mediated allergic reactions, meaning people with seasonal allergies may react to it. Reported adverse events include allergic responses ranging from sneezing and watery eyes to, in rare cases, anaphylaxis and occupational asthma (seen in people who handle the plant frequently).
If you take lithium or carbamazepine, avoid plantain supplements. The herb can interact with both medications. And while drinking plantain tea occasionally is unlikely to cause problems for most people, consuming large amounts of psyllium-related plantain seeds has been linked to at least one case of a phytobezoar, a mass of undigested plant material in the stomach.
Cooking Plantain vs. Plantain Herb
- Cooking plantain (Musa paradisiaca): A large, starchy fruit related to bananas. Used as a food source worldwide. Rich in potassium, resistant starch (when green), and vitamins A and C. Eaten boiled, fried, baked, or mashed.
- Broadleaf plantain (Plantago major): A small, leafy herb found in temperate climates. Used topically for wound healing, insect bites, and skin irritation. Contains anti-inflammatory and antimicrobial compounds. Available as salves, teas, and tinctures.
The two plants share nothing but a name. If you searched this topic looking for recipes, you want the fruit. If you’re curious about natural remedies for skin irritation, the herb is what you’re after. Both have legitimate, well-documented uses, just in completely different categories.