Do you have trouble going to sleep? Do you use an electronic device at night? Devices like e-readers, iPads, mobile phones and laptops emit a short wavelength light which has a concentration of blue light. Melatonin is that wonderful hormone which puts us to sleep at night. A recent study done at the Boston Brigham and women’s hospital showed that using such a device within 4 hours of going to bed reduces our blood Melatonin levels by 55%. People who used the e-reader in the evening took more time to get to sleep, had less rapid eye movement sleep, and were more tired in the morning. (Published Dec 22 2014 in the Proceedings of the National Academy of Science)