Hi.
I've been low carbing for amount a month now.
I've always had sallow skin with shadows under my eyes.
I do look healthier in summer due to catching done sun on my face.
I've noticed that I look worse now I'm low carbing.
That makes no sense to me!
I certainly don't have that glow for giving up sugar. 
I've not touched caffeine or any diet fizzy drinks etc.
I am slightly perplexed by it.