Originally published at invisible druid. You can comment here or there.
So when people who are overweight, unhealthy, and in a bad place go low carb or paleo (or both) they are often told to go ahead and eat as much as they need and not worry about calories. This is not a lie per se but it is a misleading oversimplification. It is probably the single biggest one in the paleo community and it is responsible for a lot of let downs after initial weight loss (especially after a year).
So let's talk about that. The Paleo community is fond of saying that calories don't matter. Is that true? No, it's horseshit.
Conventional Wisdom is fond of saying "calories in, calories out". Is that true? No, it's horseshit.

The truth is they both matter. No, a calorie is not a calorie. Never was. A calorie of sugary processed food or complex carbs (ie: sugary processed foods) is digested and handled differently by your body than a calorie of meat or animal fat or vegetable matter. It's this difference that can lead to insulin resistance, leptin resistance, diabetes, etc. And once you're in one of these metabolic states, you're pretty much screwed. Your metabolism crashes, your cortisol gets out of whack, your blood sugar yo-yo's and basically in this state you can bring in a very small number of calories while still gaining weight and getting fat and unhealthy. Why? Lots of reasons, but the biggest reason is that your body is eating your muscles and fat while storing all your carbs as new fat. You get fat and weak and you eat less and less. Your metabolism keeps going down. This is how the people on reality TV can eat an average amount of food and still weigh 600 pounds.

Okay, so that's Conventional Wisdom being wrong. Big surprise. What about the paleo lie?
At a certain point calories matter. Of course they do. And for the same reason faulty science has been telling you they do all along. You use X calories per day to run your body. You eat X+200, you will be gaining weight. You eat X-200 you will be losing weight.

Yes, that weight will be gained and lost slower if you're eating paleo, but it can happen. But, to be honest, almost nobody who began as overweight gains weight on a paleo diet. Far more common is the person who loses a bunch and then stops losing and hangs at a weight that is more than they'd like. And here's why:
Let's take an average overweight person. They're metabolically deranged, sure, but they are also eating poorly. Let's say they get up and have 3 Egg McMuffins and a large coke for breakfast. Then for lunch they go across the street to a Italian bistro and get a small pasta with cheese sauce and a soup and some bread. More soda. Dinner is a chunk of meat with rice-a-roni and some veggies from a bag that have a cheese sauce. More soda. After dinner they sit on the couch and watch TV while snacking on some pretzels. Another soda. This person is not eating a giant amount of food. These were pretty reasonable portions. That person also consumed around 4000 calories. If that person is a male over six feet tall, we're talking the BMR of a person over 500 pounds. So is it any wonder that on this diet you gain weight? Sure, some days you eat less and some days you get triple dessert and you eat more. But that's not an insane amount of food.

So now let's assume that very same person goes paleo and let's assume they do it properly. So for breakfast they have eggs and bacon till they're satisfied. That comes out to 4 eggs and 4 slices of bacon. Then for lunch they have a giant salad with chicken breast, egg, and oil and vinegar dressing. Dinner is a big hunk of pork shoulder, a lot of steamed vegetables with butter, and some frozen blueberries for dessert. During the day they snack on almonds (about 2 handfuls). Maybe they also have 2 pieces of dark chocolate. That's a lot of food. You'd be hard pressed to find anyone who would not be satisfied with that. It's also 2000 calories. That's about the BMR if someone who is a six foot male weighting 250 pounds. So in a year's time, right on track, you are no longer metabolically deranged, your body is good at burning fat and making ketones, and you're weighing in at 250 pounds.
Good for you. You're healthy, if a bit overweight. But that's not where most people want to be, not even the big guy we started with. He wants to weight, say, 200 pounds.
Well, now we're going to have to ratchet it down a bit. And he can, of course, if he looks at what he's eating, does the math, and lowers his calories. Want to do it effortlessly instead? Okay, the you have two options.
1: stay at the weight your body is maintaining. It's not unhealthy, and clearly you're isocaloric. Yay for you!
2: lower calories by eating a bit less and eating foods that are more satiating and lower in overall calories. What that means is lots of protein and very little carbs and less fat. So get rid of the almonds, lose the added fat on most stuff, and try some leaner cuts of meat. Eat more vegetables and do most of it at home. That will get you there, sure. But it's not as much fun as all you can eat bacon and pot roast, which is what stops a lot of people.
So take your food temperature. Is it more important to you to get your weight down or to eat whatever you want? You do have to pick and choose a little bit. But if you just eat a little bit hypocalorically (that is leave yourself feeling a little bit hungry sometimes or at least not super full) this is not that hard. But what it has to be is consistent.
Remember how reasonable you've been about food lately? That day you barely ate anything? I do. I remember it well. It happens all the time. But looking back on my food log what I learn is that of the last 7 days, there was one day like that. It's just that I can see that one day standing out so clearly in my faulty memory that it seems longer and bigger and more impressive than the day that I ate a lot. Days when you eat a little more than you should never stand out. The days when you eat way too little or way too much do. So if you want to really get real about it, keep a food log. I recommend My Fitness Pal. It's a really easy food log and it helps me keep track. I modified by macronutrient defaults for paleo and I was good to go.
And now, for the trap.

Note that I did not list, as an option above, to exercise more. The easiest trap to fall into here is thinking that you can exercise and "earn" more calories. That's not why exercise matters. Yes, muscle burns more calories than fat. Yes exercise makes you mobile and fit. Yes, it's good for your metabolism. Yes, you have to exercise. But you don't earn back calories exercising. Almost all studies show us that in a free eating environment, people will generally bring in extra calories to account for exercise. Yes, if you want to lose weight you can try to avoid that, but honestly, if you just get used to restricting a little bit before you exercise, it won't be an issue.
If you really want to get your exercise on to lose weight combine some metabolic conditioning (ie: stuff that gets you breathing heavy, but not a ton of it) with some lifting heavy stuff and weekly bouts of sprinting (a set of Tabata sprints will do just fine). More than this will just ramp up your eating. Most importantly, do something you like.
In the end, the real truth of the matter is that calories matter, but quality matters, too. Eating foods that are nutritionally dense and satisfying is the key to doing any diet right and avoiding processed crap, calorically dense crap, and foods that jack up your body is going to be the right choice. Once you get settled into the lifestyle you've chosen, than you can look at the details if you want to see more change. Don't be afraid to do so. That knowledge is what gives you the power to change your body.















