How long before bed can I have caffeine

How many hours before bedtime should i have caffeine?Drinking coffee or tea just before bed does not affect quality of sleep of people with insomnia, a new study has found.For example, if you typically go to bed at 10pm, avoiding caffeine after 4pm can help minimize sleep problems.Caffeine isn't the only substance that can negatively affect your sleep.Study authors find 75 mg of caffeine increases attention, concentration, and alertness.If caffeine increases alertness and makes you feel less tired, it makes sense that it can affect your sleep if not consumed in moderation.

So says a new study published in the.So if you go to bed at 10:00 p.m., you.The magnitude of reduction in total sleep time suggests that caffeine taken 6 hours before bedtime has important.