I just discovered your site and think it’s great to have a source that tries to bind all the information and research on this ‘keto mystery’ together for the advancement of knowledge and treatment.
I have started a keto diet three times now in a period of about 2 years, the most recent one a week ago. Furthermore, I also experience the keto rash. The first time it happened was after about 1-1,5 months in. I had the rash for max. two weeks and then I went on vacation and basically the diet got botched. The second and third time though the onset of the rash was much faster, both times around 3 days in ketogenesis. So far this is similar to what I read in the stories of others.
What I noted however that is perhaps interesting and that I haven’t read anywhere is that all three times my rash both started in the exact same location and the spreading followed the exact same pattern. This indicates that, at least in my case, the rash is not completely random. Rather, there seem to be certain (small) parts of my body that are always affected and parts that are never affected. I’m not sure if this was mentioned anywhere before or if this is common knowledge but I have not read about this detail before. Maybe you know more information on this?
Regardless, the fact that the initial starting point and spreading is exactly the same three times in a row seem to suggest to me that this is more than a coincidence. Now, I have seen enough pictures of keto rash to conclude that everyone’s keto rash is in different places and of different magnitudes. However, the fixed spreading pattern within individuals could still be a potentially valuable insight in to the cause of keto rash.
My question to you is two-fold: 1) To your knowledge, do you know if my observation can be corroborated by experiences from you or others that you know of, and 2) if it is, could this fixed spreading pattern be an indication to certain causes of keto rash/rule out certain causes of keto rash?
Here is my response… which of course is unsatisfying because I’m responding with more questions.
Unfortunately I don’t have answers for you regarding either question.
It is something I’ve wondered though. What makes the skin on my chest and upper back different than the skin on my belly, legs and arms? If ketosis is a systemic phenomena, why is the skin rash in selective locations?
Differences in skin flora?
I don’t think an answer exists at this point… But I agree with you in that I think there’s something there.
Anyone else have ideas?