I wonder if a more moderate level of ketosis could achieve the same benefit without the rash? Perhaps you could experiment with shifting your late-day carbs to

I wonder if a more moderate level of ketosis could achieve the same benefit without the rash? Perhaps you could experiment with shifting your late-day carbs to morning time along with a smaller reduction in total carbs in order to find the minimum level of ketone bodies required? Maybe perform a binary search on total carb intake?