I no longer believe the pale colour of urine is a guaranteed indicator of good electrolyte levels .
Many specialist Doctors suggested it and I swore by it; often quoting it on this forum, that is, until I was excessively sleepy and passing totally clear urine.
My experience of sleepiness is exactly how described; I say sleepiness, because it's a totally different feeling to tiredness.
At times, I too struggle to stay awake and I either give in and go to bed or I will eventually fall asleep anyway.
It's not uncrontrolled falling asleep like sufferers of Narcolepsy or the excessive tiredness of Sleep Apnea; it's feeling so sleepy, it's impossible to stay awake; of which I'm totally aware of.
Various blood test have revealed nothing, nor has appointments with an Endocrinologist.
I've had some success by trying to stay hydrated, especially when I first wake in the morning and also by increasing my salt intake throughout the day.
Yeah, just normal everyday salty snacks, although I'm considering taking Salt tablets, if they exist.
I also eat baked potatoes and bananas more often than I use to (not together); in an attempt to raise my Potassium level, which is also a salt.