I have been following your LCHF eating plan for almost 10 days now and have noted in the last day or two that apart from being less hungry and more energetic, my brain is so much sharper, I am on fire in discussion with colleagues, really able to articulate myself well and am able to focus and enjoy my work to a degree that I did not think was possible. Although I have always performed very well academically and in workplace, concentration and focus is always something with which I have struggled so this is such a gift! Is this a normal response to this change in diet?