It is possible to lose 20 lbs. of bodyfat in 30 days by optimizing any of three factors: exercise, diet, or drug/supplement regimen. I’ve seen the elite implementation of all three in working with professional athletes.

In this post, we’ll explore a variation of the “slow carb” diet as used by Dean Karnazes, an ultramarathoner famed for completing 50 marathons on 50 consecutive days in 50 different states. The most impressive part of this, for me, is that he did so, not with the typical anemic marathoner build, but with a well-muscled mesomorph body.

In the last six weeks, I have cut from about 180 lbs. to 165 lbs., while adding about 10 lbs. of muscle, which means I’ve lost about 25 lbs. of fat. This is the only diet besides the rather extreme Cyclical Ketogenic Diet (CKD) that has produced veins across my abdomen, which is the last place I lose fat (damn you, Scandinavian genetics). Here are the four simple rules I followed…

Rule #1: Avoid “white” carbohydrates

Avoid any carbohydrate that is — or can be — white. The following foods are thus prohibited, except for within 1.5 hours of finishing a resistance-training workout of at least 20 minutes in length: bread, rice, cereal, potatoes, pasta, and fried food with breading. If you avoid eating anything white, you’ll be safe.

Rule #2: Eat the same few meals over and over again

The most successful dieters, regardless of whether their goal is muscle gain or fat loss, eat the same few meals over and over again. Mix and match, costructing each meal with one from each of the three following groups:

Proteins: Egg whites with one whole egg for flavor; Chicken breast or thigh; Grass-fed organic beef; Pork

Legumes: Lentils; Black beans; Pinto beans

Vegetables: Spinach; Asparagus; Peas; Mixed vegetables

Eat as much as you like of the above food items. Just remember: keep it simple. Pick three or four meals and repeat them. Almost all restaurants can give you a salad or vegetables in place of french fries or potatoes. Surprisingly, I have found Mexican food, swapping out rice for vegetables, to be one of the cuisines most conducive to the “slow carb” diet.

Most people who go on “low” carbohydrate diets complain of low energy and quit, not because such diets can’t work, but because they consume insufficient calories. A 1/2 cup of rice is 300 calories, whereas a 1/2 cup of spinach is 15 calories! Vegetables are not calorically dense, so it is critical that you add legumes for caloric load.

Some athletes eat 6-8x per day to break up caloric load and avoid fat gain. I think this is ridiculously inconvenient. I eat 4x per day:

10am - breakfast
1pm - lunch
5pm - smaller second lunch
7:30-9pm - sports training
10pm - dinner
12am - glass of wine and Discovery Channel before bed

Here are some of my meals that recur again and again:

Scrambled Eggology pourable egg whites with one whole egg, black beans, and microwaved mixed vegetables

Grass-fed organic beef, pinto beans, mixed vegetables, and extra guacamole (Mexican restaurant)

Grass-fed organic beef (from Trader Joe’s), lentils, and mixed vegetables

Post-workout pizza with extra chicken, cilantro, pineapple, garlic, sundried tomotoes, bell peppers, and red onions

Rule #3: Don’t drink calories

Drink massive quantities of water and as much unsweetened iced tea, tea, diet sodas, coffee (without white cream), or other no-calorie/low-calorie beverages as you like. Do not drink milk, normal soft drinks, or fruit juice. I’m a wine fanatic and have at least one glass of wine each evening, which I believe actually aids sports recovery and fat-loss. Recent research into resveratrol supports this.

Rule #4: Take one day off per week

I recommend Saturdays as your “Dieters Gone Wild” day. I am allowed to eat whatever I want on Saturdays, and I go out of my way to eat ice cream, Snickers, Take 5, and all of my other vices in excess. I make myself a little sick and don’t want to look at any of it for the rest of the week. Paradoxically, dramatically spiking caloric intake in this way once per week increases fat loss by ensuring that your metabolic rate (thyroid function, etc.) doesn’t downregulate from extended caloric restriction.

That’s right: eating pure crap can help you lose fat. Welcome to Utopia.

Timothy Ferris is the author of The 4-Hour Work Week.

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