Have you ever felt sleepy after a big feed of meat? Or heard that a glass of milk at night will help you drift off? Well, it's true that protein-rich foods make you sleepier. Protein is made up of building blocks called amino acids, one of which is called tryptophan.
Tryptophan is useful in increasing sleepiness and improving quality of sleep by entering the brain and being used in the synthesis of serotonin, which you may recognise as the happy hormone. Serotonin then goes on to help make melatonin which is the sleep hormone, which we need to build up by the end of the day to bring about sleepiness. Maintaining a regular intake of protein-rich foods such as meat, fish, dairy products, eggs, beans, and legumes throughout the day and with dinner may help improve your sleep.