Oh yes absolutely! I only intend to eat my first piece of solid food after 3 days of veggie shake refeeds! I have a whole list of things that I will be consuming to refeed which I think will be very interesting to see how my body reacts to!
My dinner meal tends to be SUPER high in fats and protein.
I will be doing exactly that when I eat one meal a day! But a higher focus on fats, I like staying in deep states of ketosis.
I think thats the only reason why I can last 16+ hours without a snack. If instead I ate a ton of rice and vegetables, my morning energy would be very low. I've tried that one too.
You are absolutely right, if you rely on your glycogen stores as your main source of fuel you will suffer immensely.. I don't think I could make it 16+ hours while eatings too much carbs.