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If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydration impairscauses fatigue despite proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydration impairs proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydration causes fatigue despite proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

2 added 1 characters in body
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If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydratesdehydration impairs proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydrates impairs proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydration impairs proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?

    Tweeted twitter.com/#!/StackSkeptic/status/328010802705625089
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Is sleepiness after a goods night's sleep a sign of dehydration?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.

— Just So You Know (@Know) April 22, 2013

Some quick searching unsurprisingly indicates dehydration is a potential source of fatigue (see #10), but is there any medical evidence that dehydrates impairs proper sleep and that drinking water after waking up will improve wakefulness—as the tweet implies?