wake you up

[hhtt21]

"Normally, a catabolic-aerobic-acidifying influence would wake you up and promote alertness."

Does "wake you up" mean "to stop sleeping" or "to become lively" in the above?

https://www.quora.com/Why-does-vitamin-B12-make-me-sleepy

http://www.macmillandictionary.com/dictionary/american/wake-up

Thank you.

 

[Roman55]

It means 'become lively'. It's the opposite meaning of the one expressed in the article's title, 'Why does vitamin B12 make me sleepy?'

 

[hhtt21]

It means 'become lively'. It's the opposite meaning of the one expressed in the article's title, 'Why does vitamin B12 make me sleepy?'

But I cannot understand how you can associate "wake you up" as the opposite of the title, Why does vitamin B12 make me sleepy? I ask this question because it is still blur for me to understand this. The other possibility still appears in my mind.

Thank you.

 

[emsr2d2]

The piece explains that a Vitamin B12 supplement would normally be expected to make someone more lively (make them more awake). However, the person who posted the question on the forum has found that taking a Vitamin B12 supplement seems to be making him/her tired (sleepy) and he/she wants to know why.