I'm not sure about the energy, but I wouldn't be concerned about going over on fat. Carbs is the main thing to stay lower on. I've heard people on here say carbs is a max amount, protein is a minimum and fill in the rest with fats.

You are going to have hungry and not so hungry days. It is not linear. With this WOE, more people will have a problem undereating than overeating from what I have seen. I think that is from years (or decades) of having the "watch your calories" mentality beat into our heads.

If you don't go over carbs and you get your minimum of protein and not way over that protein, you should be able to eat fat to satiety. The only way to really overeat fat this way is to eat when you are not truly hungry - i.e. habit, boredom, emotional eating, etc.

The exception is if you have become leptin resistant. Leptin is the hormone that tells you that you are full. Chronic overeaters (like me) can become leptin resistant much like one can become insulin resistant. The longer I have eaten this way, the better I have become at really knowing when I am hungry. I'm not a doctor, and I have never had my leptin tested. However, based on how I felt before and how I feel now, it seems like I may have been leptin resistant and become more leptin sensitive as I continued down this path.

I agree with the others. Fat can vary a lot day to day. I would have some days at 1200 kcal when I didn't hit my fat, and others at 2000kcal when I smashed through my fat goal by a fair bit. As long as it averaged out to a deficit, I was losing.

As to your increased energy, it could be that you've had enough calories, enough electrolytes, or you could be becoming fat adapted (body 's primary preferred fuel is now fat).

Let us know if it continues even on less hungry days.

I have days where I eat more protein, and some days with more fat. Somedays I come under on everything.

I have been consistently losing weight. Even overeating protein or fat is better than what I ate before, and my body loves me for it

@aprilsun66 I had energy issues for the first 6 months of keto. At that time my IBS had fully resolved and two years later has not returned. I was a very very sick person with health failing fast when I stopped eating sugar and all grains cold turkey Oct 2014.

Keto is very different from person to person and think we need to give ourselves 90-180 days of the keto Way Of Eating for our bodies to more fully adapt. Try not to set your expectations based on the results of others.

I generally work to keep my carbs <50 grams daily and protein in the 70-90 gram range. Total calories I do not track but they are more in the 2000-3000+ range. Often I will have 1500 for breakfast because my first cup of coffee can run 800 calories.

For movement I walk a 1/4 mile daily down and back up a steep hill plus just living.

Best of success and welcome to MFP forums.