No matter how tempting it is to have a sweet treat before bed, it’s a bad idea for anyone, especially those struggling to sleep. Sugary foods, like ice cream, cakes and sweets send blood sugar levels spiking, followed by a crash. This crash alerts the adrenals that there is an emergency, which, in turn, increases cortisol levels, and wakes the body from slumber. Those desperate for a sweet fix before bed should consider having a banana, as they promote sleep.
Article source: https://www.huffingtonpost.co.uk/entry/foods-to-avoid-for-better-sleep_uk_6221e6b6e4b012a26288fe3d