Unripe green Cavendish-type banana with the highest resistant starch content of any banana ripeness stage — up to 20g resistant starch per 100g (raw, as-purchased). As banana ripens, the starch converts to sugar: the green banana is the glucose-aware, gut-feeding version of the fruit that eventually becomes a high-sugar dessert fruit. Available in every grocery store in America, where it is typically sold green and marked 'ripen at home.'
Green bananas are in every grocery store in America — the most accessible resistant starch food in this database. They are literally cheaper than ripe bananas ($0.25-0.40 each). The entire community is already buying them; APEX tells them to use them before they turn yellow.
Raw green banana has the highest resistant starch content of any banana ripeness stage — up to 20g/100g raw, declining to near-zero in fully ripe bananas as starch converts to sugar. This resistant starch (RS2 type) is extensively documented in clinical trials: a 2019 Lancet review found resistant starch intake dose-dependently reduces all-cause mortality, with 25-29g/day associated with a 30% reduction in colorectal cancer risk. A 2015 RCT (British Journal of Nutrition) showed green banana resistant starch supplementation significantly reduced fasting glucose and HbA1c in T2DM patients. For the APEX population facing T2DM at nearly double the rate of white Americans, the fact that the most medically significant form of a food they already buy and eat sits green on the shelf — and most are waiting for it to ripen before eating — is one of the most actionable insights in this database.
Method 1 (raw grated): Peel green banana (oil hands first — the raw latex stains), grate raw into oatmeal, smoothies, or rice dishes. The flavor is very mild when raw-grated — it thickens whatever it is added to. Method 2 (boiled): Boil unpeeled green bananas in salted water 20 minutes. Peel after cooking. Serve with olive oil and salt. Method 3 (baked): Score unpeeled green bananas, bake at 400°F for 20-25 minutes. Peel and eat. Cool any cooked form before eating to maximize resistant starch.
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