What makes caffeine sneaky is that it’s in more products than you think. Many people only think of coffee, but tea, cola, energy drinks, chocolate, and even some workout supplements and painkillers also contain caffeine. Together, they can add up to a stack bigger than you expect—and that your body still has to handle at night

I want to focus on 5 commonly used sleep supplements that you can easily find at your local drugstore: valerian, L-theanine, tryptophan, 5-HTP, and zinc. Each of these has its unique properties, but, as always, it's important to take a critical look at supplements before fully relying on them

I will elaborate a bit more on popular sleep supplements. This is based on an article in The Washington Post, which evaluated recent scientific research on the possible positive effects of five supplements often used to improve sleep: melatonin, magnesium, probiotics, vitamin D, and ashwagandha.

I sometimes see people turn to cannabis to help them sleep better. Some are enthusiastic about it—they sleep more deeply, feel calmer, and function better during the day. Others notice little difference or even feel worse. Why does it work for some but not for others?