…according to biochemists at John Moores University: Try eating unripe bananas. They contain resistant starch – which is crucial for weight loss. Because even though resistant starch is a carb, it’s chemical make-up doesn’t cause our blood sugar to rise. Resistant starch also helps release a hormone that increases fat burning. And scientists say the less-ripe a banana is, the more resistant starch it contains. So aim to eat 20 grams of resistant starch a day – or 2 unripe bananas.