Welcome to the forum. This is a great place to not only ask questions but share your experiences. The carnivore way of eating is very individualistic. You and I could eat the exact same thing and at best our results would be similar, but never the same. Everything matters and everything factors. I'm 55. I am always intrigued when people much younger than me try this way of eating. Most people tend to be a bit older. Off the top of my head is that I have been pummeling my body longer so therefore the healing may take longer. I would think the younger the better, but just a thought, no real science to that way of thinking. Day 41 is more than likely still in the adjustment phase. I always preface the following with 'I hate to use these words' but I am pretty sure you are still detoxing and having withdrawals from sugars and carbs. The snacking won't help but the most important thing is that you got back on track. Now try to push thru the cravings and maybe the need to snack will get further and further apart. As far as the energy, and fatigue and even mood go, there can be several factors. Are you getting enough fat? You have eliminated your fuel source by not eating the carbs and sugars. There is the adjustment time with your body switching fuel sources and during that time you must supply the fat. Most people say, 'meats and fats' and that is not the priority. Higher fat/moderate proteins is the best approach. You can count macros thru a number of different apps or if you question a ratio just eat some more butter. You completed the most important step of carnivore and that is the elimination of carbs and sugars, and the next step is to replace them with a new fuel. You could simply not be eating enough during your adjustment period. When we eliminate the carbs and sugars our water content changes, and we will need more water until we dial in our proper hydration. Most people get more than enough salt form the garbage diet prior to carnivore. When completing the elimination phase the sodium level can go down and the electrolytes are no longer in balance. In the early stages of carnivore coming up short on electrolytes can be very easy to do, so much so, most everyone misses that early. I'm 13 months is and have not really found the mental clarity or changes in mood. The closest thing I have found is that when I wake up, I'm wide awake in that split second. My eyes open and my feet hit the floor ready to go. If that counts, I may have experienced some of that type of benefit. If not, then maybe it will come later. Good luck, and welcome. Push thru these early stages and maybe 90 days will not be your ceiling as the benefits (as for me) seem to be continual. Scott