The real answer to your question is "maybe".
Generally, most body builders do not advocate mixing fat and carbs. Most body builders eat a low fat, high protein, cyclical carbohydrate diet. On their low carb days, they'll eat a moderate amount of fat to make up the difference, but it's still low fat compared to Primal, where people eat as high as 70% daily calories from fat. IMO, you probably won't be able to get ripped eating 70% calories from fat. Dietary fat, with the exception of MCT's, pretty much goes directly into fat storage. When you get lean, it's actually easier to get ripped eating lower fat and higher carbohydrate because you can use glycogen depletion to your advantage, something you can't do on a higher fat diet. Again, this is the general case.
The fact is, different people need different diets. For the overweight with damaged metabolisms on this website, a high fat, low carbohydrate diet is advantageous. This is because they're insulin resistant and they've wrecked their bodies, so carbs are out for them in the short term. For people with issues with insulin, 50-70% calories from fat would probably do them a lot of good. For them, most of the weight loss is going to come from insulin reduction regardless of caloric intake.
Then, there are the very lean. People like yourself probably have a predisposition to partitioning carbohydrate in muscles instead of fat cells. Even if your glycogen stores are depleted, you're still going to store some carbs as fat. It's not a perfect system. Some people just naturally tend to partition carbohydrate into fat storage no matter what, and these people would perform better on higher fat. Guys like you probably tend to partition carbohydrate to muscle, which is the case for all the skinny diabetics out there. Hey, there are tons of them! You may actually put on body fat eating a high fat diet, but I could easily be wrong. Maybe you're just one of those genetic freaks that just doesn't effectively store body fat. If so, you're a lucky man.
The diet you're describing is "isocaloric" - a roughly even spread between fat, protein and carbohydrate. Think 33%/33%/33% calories from fat/protein/carbohydrate. This is what "The Zone" is. It can be beneficial for some because the regular carbohydrate intake is enough to keep their leptin levels high, but low enough that their bodies can burn fat efficiently - something that the high carb American diet bordering on 60% calories from carbs doesn't do. I ate isocaloric above maintenance calories all last week while taking the whole week off from the gym and could swear I lost a little body fat. I felt great with a 33/33/33 spread, and it allowed every kind of meat, fruit, vegetable and tuber on the plate for me to eat, which was liberating. I was eating 2 sweet potatoes and 2 bananas with green cabbage fried in coconut oil with every meal and it was incredible.
You basically need to experiment and find out what you best react to. Note - barring some kind of extreme sensitivity, you're not going to get unhealthy eating carbohydrate from Primal whole food sources. You need not fear bananas, sweet potatoes, white potatoes, squashes, white rice and the like. These aren't the things causing the health concerns. I personally believe that insulin resistance is largely caused by the huge omega 3 : omega 6 imbalance in this country. We take in far too much n6 and not nearly enough n3. Actually, I think we take in too many PUFA's in general. Studies have shown that grain consumption was higher 100 years ago, yet we have heart disease now and not 100 years ago. I believe it's mostly the industrial seed oils causing it, then the grain consumption compounds the issue because the PUFA's make our cell membranes weak and susceptible to damage from free radicals. Saturated fat, on the other hand, strengthens our cell membranes and keeps the free radicals out, and since saturated fat is demonized, you have people walking around with low defenses to the natural toxins in grains, legumes, nuts, etc. That's my personal theory and I'm sticking with it.
Experiment and don't fear carbohydrate from Primal sources. Stay away from wheat, corn, brown rice, legumes most of the time and ESPECIALLY vegetable oils and you'll be so far ahead of the game the last thing you have to worry about is starch. That being said, IMO, you should try and push your starches on the days you work out with heavy weights and eat lower carb on off days or cardio days while upping your fat a bit to make up your calories. Protein should be pretty constant at 1-1.5g/lb of body weight. This is my recommendation.
Last edited by ChocoTaco369; 09-20-2011 at 10:19 PM.
Don't put your trust in anyone on this forum, including me. You are the key to your own success.