Caffeine, for example, interferes with sleep by blocking adenosine receptors—key components that promote sleep—with its impact varying based on genetics and other individual factors. While alcohol may help you fall asleep more quickly, it disrupts sleep later in the night, particularly affecting REM sleep. Meal timing and food choices affect sleep through various biological pathways. For instance,carbohydrates can enhance the availability of sleep-promoting substances like tryptophan, while nutrients such as magnesium and B vitamins may support sleep regulation. Sleep supplements, including melatonin and herbal remedies, vary in effectiveness, making proper timing and dosage essential for achieving their intended benefit.