When I was first diagnosed, over four years ago, and still haunted these boards, one of the first pieces of advice anybody gave me was: “Don’t get cold, don’t get tired, don’t get hungry.”
I wish I could remember who said it, to thank them, as I have found it sound advice - though of course I disregard it at times, and pay the price - who doesn’t like to test the limits once in a while?
I’m not sure it’s specific to MS. I think that once you are ill - with anything - you can’t take liberties with your body as you used to. Traipsing around for hours without eating might have been OK before. It’s not now. Not great, but just the way it is.
Fortunately, out of all the things MS can throw at you, and all the conflicting advice there is about everything, this is one that’s not too hard to manage. Remembering that eating is important, and it’s not OK to skip meals on a whim, is a lot easier than some of the complicated regimes people subject themselves to. It usually doesn’t take a huge amount of forward planning to make sure you’re not overdue a meal.
(I’m probably peri-menopausal too, but I honestly don’t think that’s anything to do with it.)