For me the diet has continued to cause a significant reduction in many of my ME symptoms and, like others have stated in their follow-ups, increases my energy and activity envelope before PEM or a crash. It doesn’t prevent PEM or crashes when I try to stay at the activity level required to work and live anywhere close to a fairly normal life.
The diet increases the envelope ceiling and the number of days I can go before PEM or a crash. No matter what anti-crash supplements or other things I’ve tried can I prevent them given the activity levels I am at before, only by reducing activity levels significantly can crashes be prevented. Levels that would not allow maintaining a job etc.
The diet has also not brought me back to pre-ME activity levels, not close at all really. But for the week or more between each PEM/crash event, depending on my workload, stress, and physical exertion levels, I can be somewhat active and live a limited regular life. It would be considered a high activity level for ME standards with some work and life tasks but I definitely cannot exercise, work much, or do things that waste energy. You can see it’s not close at all to pre-ME activity but it’s a huge improvement over 100% moderate homebound severity. But it also shows what a nightmare ME is, so horrible and debilitating, because even just having PEM and crashes every couple weeks or so make living a normal life impossible.
Before crashes I get my standard build-up of symptoms, including my body and brain strongly pushing me to want to eat carbs. It’s like my body is screaming to me in a visceral and painful way, “I’ve run out of energy, it hurts like hell, please I need energy now!!!!!”. If I eat enough carbs it extends my crash time significantly.
In addition, for me the diet must be followed fairly strictly, otherwise i start getting worse pretty fast. The blood measurements I’ve taken have shown a fairly strong correlation between my GKI and symptom levels.
It’s clear to me that the diet is the definite cause of the symptom improvements, it’s not coming from from something else or regular ME disease fluctuations.
It’s an easy experiment to prove this, when I stop the diet and follow a healthy regular diet within one day symptoms start increasing, within 2-3 days I’m completely crashed, with strong chronic symptoms, and back to moderate severity level where I’m homebound. When I restart the ketogenic diet symptoms start to improve within a couple days and I come back to where I was at a GKI < 3.
I can cause the above significant symptom changes over and over again by changing the diet, so it’s fairly clear that the diet is causing this.