I'm five days into my 2-week liquid diet, and I have most of the symptoms of "low-carb flu," plus a couple of extra ones. I find I'm very anxious and jittery during the day, and I have strange, vivid nightmares at night that are hard to wake up from. I drink almost no caffeine, so that isn't the cause of the anxiety. Any thoughts on whether my symptoms are related to my diet?

I start my diet on 1st April and have heard of this, whether it's to do with being in such a low calorie diet or just your body going through a detox it's fascinating!
Would love to hear other people's journeys on this!

I had vivid dreams/ nightmares starting at my pre op diet and have continued, I am 6 weeks post op and they are still vivid sometimes I wake up thinking it was real!!

Now that you mention it, yes. That abated for me soon enough. Vivid is one thing, but nightmares are another. If you have chronic nightmares, consider mentioning this to your surgical team. Good luck!

Yes

My surgery is scheduled for April 3rd. It's feeling very real this week, which is why I believe I'm having crazy and vivid dreams. I usually dream about the same old stuff, but these dreams are weird!
My liquid diet starts March 29th.

Not having nightmares, but my sleep is very fitful and I am feeling jittery during the day with 1/3 of my usual coffee! Maybe pre-op jitters? Or maybe it is the diet? Our subconscious minds are surely very busy sorting out these changes and trying to make sense of them.