It's time to end the debate of all debates.
You want to lose weight, gain muscle, and change your body—but without worrying about whether you're eating the right foods. After all, countless diets pronounce that they provide the ultimate solution to your goals. Only problem is, they all differ in the types of foods they suggest, the timing of meals, and how much you can eat.
But all diets are dependent on one common factor: macronutrient composition. That is, the protein, carbohydrate, and fat content in the foods you eat. Macronutrients are the single most important factor that determines a diet's success or failure. Every diet has its own macronutrient manipulation. On one end of the continuum are the low-carb diets, such as Atkins and Protein Power (and some variations of the Paleo Diet). More towards the middle are diets like The Zone and South Beach. On the other end of the continuum are high-carb/low-fat diets such as Pritikin and Ornish.
So who's right? Recent evidence in the International Journal of Obesity suggests that the diet you can stick to best is the right one – regardless of the exact breakdown of macronutrients. But this still leaves questions about how to determine your needs to simplify eating. Consider this your final answer, and the guide you need to finally determine the most effective plan for you.
Hitting your goal for the day is the most important aspect of eating protein, whether it's for fat loss, building muscle, or just maintaining your weight.
WHAT IT IS AND WHY YOU NEED IT Protein is the major structural and functional component of all cells in your body. Proteins literally play a necessary role in many of the biological processes that allow you to live and function. Not to mention, about 25 percent of your muscle mass is made up of protein—and the rest is made up of water and glycogen (your body's stored form of carbohydrates). So it's no wonder why so many diets place a heavy emphasis on protein. But the reason you need to eat so much is simple: Unlike other nutrients, your body can not assemble protein by combining other nutrients, so enough must be consumed in your daily meals in order to achieve your desired health and appearance.
BIGGEST MYTH Despite what you might have heard, your body can process a lot more protein than you think in each meal. Like a big steak dinner? Don't worry, you can handle it. The most common claim is that your body can only handle 20 to 30 grams per meal and that the rest will go to waste. Nothing could be farther from the truth.
The idea that your body can only handle limited amounts of protein was one of the initial reasons why people began eating meals every 2 to 3 hours. It was a tactic designed to prevent wasting food, while also raising your metabolism. However, science has proved that your body can take as much time as it needs to digest and absorb protein and utilizes all of the nutrients appropriately. With the exception of a massive protein binge—where you consume more protein in one meal than your body can handle in an entire day—you can feed yourself larger doses as part of a healthy approach to your diet.
ADDING PROTEIN TO YOUR DIET
While most people think that protein is most important before and after your workout, this isn't true. Hitting your goal for the day is the most important aspect of eating protein, whether it's for fat loss, building muscle, or just maintaining your weight. Setting your protein goals is a fairly simple process. Research shows that a range of .5 to 1 gram of protein per pound of body weight is ideal if you are active. If you want to be even more specific, a good general guideline is to eat about 1 to 1.5 grams of protein per pound of lean body mass (LBM). However, most people don't know or can't reliably measure their LBM. As an alternative, consume 1 gram of protein per pound of your goal body weight.
That means if you're a fluffy 200 pounds and want to be a lean, toned 180 pounds, simply eat 180 grams of protein per day. Learning what food intake amounts to 180 grams of protein – or any macronutrient – is a matter of tracking your intake. Food journaling software like LIVESTRONG.COM's MyPlate can help you record how much protein you're really eating.
THE BOTTOM LINE The pitfalls of under-doing protein far outweigh those of overdoing it. Meeting protein requirements is particularly important when you're trying to lose weight because protein is the most muscle-sparing and metabolic macronutrient, and it also keeps you full. If you struggle to achieve your protein target through whole foods like meat, fish, poultry, eggs, legumes, and milk products, you can easily supplement your diet with protein powder (whey, casein, or egg). There's no need to nitpick over the precise distribution and timing of protein throughout the day, just concentrate on the total for the day, and consume protein at doses and times that suit your schedule and personal preference.
WHAT IT IS AND WHY YOU NEED IT
Fat is a major fuel source for your body and has multiple functions, such as helping your body absorb fat-soluble vitamins, regulating inflammation, and hormone production. Like protein, fat is considered to be nutritionally essential because certain fatty acids (linoleic acid & alpha-linolenic acid) cannot be sufficiently produced by your body for survival, and thus you must fulfill your needs by eating fatty foods. That's right. Read that sentence again: You must eat fat. Although essential fatty acid deficiency is uncommon among adults in developed countries, the consumption omega-3 fatty acids is often too low for the purpose of optimizing health and preventing disease.
BIGGEST MYTH Let's settle the score once and for all: Fat does not make you fat.
Once you get beyond that myth, there are many other misconceptions that could steer your eating habits in the wrong direction. Most notably, many people still believe that saturated fat is a dangerous substance that causes heart disease and should be avoided. This myth has survived for at least the last 3 decades, and has refused to die despite numerous studies that have shown that saturated fat is actually good for your body. In a recent invitation-only scientific consensus meeting, the Department of Nutrition at the University of Copenhagen determined that saturated fat does not need to be avoided. What's more, a recent review failed to find a link between saturated fat and coronary heart disease. More importantly, it's not just that saturated fat isn't bad; the scientists found that eating saturated fat benefits your health.
That doesn't mean that all fats are safe. The Dutch analysis found that excessive trans-fats (from hydrogenated vegetable oils in shortening, commercial baked goods, and refined snack foods) still pose a significant threat to your health.
ADD FAT TO YOUR DIET The best way to prevent heart disease is to simplify your diet. Eat more whole and minimally refined foods, including an increased proportion of vegetables, fruits, and nuts—and know how to balance your omega-3 fatty acids. The American Heart Association (AHA) recommends 0.5-1.8 g/day of combined EPA and DHA, which are omega-3 fatty acids with potent heart-protective properties. This intake can be achieved by either consuming two to six one-gram capsules of fish oil, or by having roughly three to six ounces of fatty fish per day. Vegetarians should realized that achieving the same EPA and DHA levels with flaxseed oil is a much less efficient process, requiring roughly double the dose.
THE BOTTOM LINE Unfortunately, there isn't a gold standard for the amount of fat you need in your diet. Instead, it should be determined on an individual basis. The most recent report by the Food and Nutrition Board of the Institute of Medicine recommends that you eat at least 20 to 35 percent of your total calories from fat. But realize that eating slightly more than this won't cause added fat storage as long as your total calories match your goal for weight gain, loss or maintenance. If you still want a target, divide your weight in half and eat that many grams of fat. So if you're 180 pounds, you would aim to consume 90 grams of fat per day.
WHAT IT IS AND WHY YOU NEED IT Carbohydrates have many functions, but their main role is to provide energy to the cells in your body. Carbohydrates are unique because they are not considered essential. That's because your body can synthesize its needs from non-carbohydrate sources though processes called gluconeogenesis and ketogenesis. As a result, the other foods you eat (proteins and fats) can be converted into energy, meaning that your general survival does not depending on eating carbohydrates. As mentioned before, this can't be said about amino acids (protein) or essential fatty acids (fat)—both of which you need to obtain from foods.
Still, while carbohydrates technically are not essential, you do need them when living an active lifestyle. Not to mention, fruits and vegetables are two of the most important sources of carbohydrates, and both provide nutrient-rich calories that protect against disease.
BIGGEST MYTH Carbs do not make you fat. (Picking up on a theme?)
Ever since the low-carb craze began in the early 1990s, carbohydrates have been demonized as the cause of the growing obesity rates. And while a low-carb diet does have many health benefits and can lead to lasting weight loss, there is no "metabolic advantage" to going low carb. In fact, a study published in the American Journal of Clinical Nutrition compared a low-carb diet with one that was higher in carbohydrates. The result: There was no difference in weight loss or changes in the ratio of muscle-to-fat. What's more, when researchers compared a low-carb diet with a low-fat diet (and higher in carbs), they discovered that neither was better at boosting metabolism.
You can analyze studies and research all day, but the bottom line is simple: You can eat carbs and still lose weight. The diet you choose will be largely dependent on many personal preferences and eating styles, and whether it's low carb or higher in carbs, both strategies can be equally effective at creating change.
ADD CARBS TO YOUR DIET Generally speaking, if you're active you need anywhere between one to three grams of carbohydrate per pound of lean body mass. The carbohydrate requirement tends to range more widely than the other macronutrients because it's largely dictated by how many calories you're trying to eat per day, and your total amount of activity. In other words, determining the right amount of carbs is really the fourth step in your diet plan. First, figure out how many calories you need, then set goals for proteins and fats. Once you establish those guidelines, then your remaining calories for your weight goal should be filled in with carbs.
THE BOTTOM LINE Carbohydrates, just like fat and protein allotments, should be comprised mostly of whole and minimally processed foods. For most people, carbohydrates are a form of dessert. And if you're eating healthy, about 10 to 20 percent of your total calories can basically come from any foods you want. Your choices among carb-dominant foods (fruit, milk, starchy vegetables, non-starchy vegetables, grains, legumes) should be based on your personal preference and tolerance, while maintaining as much variety as reasonably possible. As a rule of thumb, eating two to three fruits and two to three vegetables per day will usually fill up the majority of your carbohydrate allotment, while providing beneficial nutrients that will help your overall health. Easy enough, right?
The Eating Guide
Are you a calorie counter who wants an even more focused plan? Once you figure out how many calories you want to eat per day, use this plan from Alan Aragon (alanargon.com) to balance your macronutrients and drop fat fast.
Key 1 gram of protein = 4 calories 1 gram of carbohydrates = 4 calories 1 gram of fat = 9 calories
Protein Eat one gram of protein per pound of your goal body weight.
So if you want to weigh 200 pounds, you'd eat 200 grams of protein per day for a total of 800 calories.
Fat Remember, the amount of fat you want will depend on many specific factors. As a rough goal on a fat loss plan, eat .5 grams of fat for your goal body weight.
Using the 200 pound model, you would consume 100 grams of fat per day, or 900 total calories.
If you find that this is too much and you gain weight (reminder: fat does NOT make you fat), aim for .3 to .4 grams of fat per pound of goal body weight. Listen to your body and you will see changes.
Carbohydrates Carbs are dependent on how much protein and fat you consume in your diet. That is, you'll eat carbs to fill in the remainder of calories needed in your diet.
Using the formula above, let's say you wanted to eat 2500 calories per day.
Add your protein (800 calories ) and your fat (900 calories) and then subtract it from the total number of calories you want to eat (2500-1700 = 800 calories).
Divide the remainder number of calories (800) by 4, and you'll have a target number of carbohydrates you should eat (200 grams).
Therefore, on this sample diet you'd eat: 200 grams of protein (800 calories or 30% of your diet) 100 grams of fat (900 calories or 40% of your diet) 200 grams of carbs (800 calories or 30% of your diet)