Do sugar alternatives like splenda or the older varieties make you tired? I have been getting seriously sleepy lately and continue to go through a lot of mio for my water intake. On a related note, I am starting to wonder what mio really is and the long term effect on the body. Anyone know?

Are you taking your vitamins and some Vitamin B12? I am tired, but it is my thyroid.

Yes, I faithfully take my vitamins every day including the B12.

Are you taking your Vitamins and some Vitamin B12? I am tired' date=' but it is my thyroid.[/quote']

I have been also having quite a bit of caffeine lately from mio energy drinks. I wonder if too much caffeine can actually make you tired and sluggish rather than full of energy?

Maybe your caffeine intake is affecting your sleep quality? When I drink something with caffeine late in the day it takes me longer to fall asleep.

http://www.livestrong.com/article/419509-caffeine-effects-and-duration/

I have been also having quite a bit of caffeine lately from mio energy drinks. I wonder if too much caffeine can actually make you tired and sluggish rather than full of energy?

Haven't tried to take too much caffeine or coffee, what I experience is, when I drink coffee, it seems gives an extra energy to continue to stay awake, but there are also time that coffee has no effect for me especially when I am so tired, sleep or rest is the only answer.

I have been also having quite a bit of caffeine lately from mio energy drinks. I wonder if too much caffeine can actually make you tired and sluggish rather than full of energy?

Caffeine, like any stimulant, will give you a surge followed by the inevitable down swing. So yes, in that sense, it can leave you sluggish after the affects wear off.