Patch Please ad: Reason #3: Too much melatonin: awake at 3am, foggy at 8

In an MIT study, a 3 mg dose of melatonin kept blood levels raised into the daylight hours. The researchers said this can cause a "hangover" effect in some people. The dose that worked best in the same study was 0.3 mg. It's reason #3 in our article: 7 reasons you still wake up at 3am on melatonin.