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Healthy nutrition often revolves around numbers, whether you're tracking calories, Weight Watchers points, or macronutrients. Macronutrients, or 'macros,' encompass carbohydrates, fats, and proteins—the foundational elements of any diet. Balancing these components correctly can make healthy eating far more effective, particularly when simply cutting calories doesn't yield results.
A major drawback of traditional calorie counting is its disregard for the quality of food, focusing solely on quantity. While portion control might work temporarily, it often fails in the long run unless you prioritize foods that keep you full and satisfied even while consuming fewer calories. Without this shift, maintaining self-discipline becomes increasingly difficult.
To eat more of the right foods, shifting your focus to macronutrients instead of calories can be incredibly helpful. Some individuals thrive on diets lower in carbs and higher in fats, while others perform better with more carbs and less fat. By setting and achieving macronutrient goals, you can identify the optimal diet for your body and sustain it without demonizing or completely cutting out fats or carbohydrates.
The three primary macronutrients
The three essential macronutrients are protein, carbohydrates, and fats. Alcohol also qualifies as a macronutrient, and we’ve discussed it in detail here. Below, we’ll break down each macronutrient to build a foundational understanding and then determine the daily required intake in grams.
Protein
Calories: 4 calories per gram.
Overview: Often hailed as the cornerstone of fitness nutrition, protein is primarily linked to muscle development and is abundant in foods such as meat and dairy. Yet, its role goes beyond muscle repair—it’s a fundamental building block for organs, bones, hair, enzymes, and virtually every tissue in the human body.
Proteins consist of amino acids, many of which the body can produce on its own. However, there are nine amino acids crucial for normal bodily functions that the body cannot synthesize. These are known as essential amino acids, and they are abundantly present in all meat sources. For vegetarians and vegans, obtaining all nine from legumes and grains is challenging, so a diverse diet is essential to ensure adequate intake.
Carbohydrates
Calories: 4 calories per gram.
Overview: Carbohydrates have had a tumultuous relationship with the diet industry. Although your body can technically survive without them, doing so would be far from ideal. Carbs serve as the most readily available energy source, broken down into glycogen (used by muscles and the liver) and glucose (fuel for the brain).
In nutritional terms, carbohydrates are typically categorized into simple and complex carbohydrates. This classification depends on the length of the carbohydrate molecules. Shorter chains are easier for the body to break down, making them 'simple'—essentially sugars. Conversely, larger molecules like starch are 'complex' because they require more time for the body to process into usable energy.
In the realm of macronutrients, a carbohydrate remains a carbohydrate, regardless of whether it originates from sugar or starch. To clarify, we’re not suggesting that pop tarts and candy should be your go-to sources for meeting your carb goals. Over time, as you track your macros, you’ll likely find yourself leaning toward complex carbs for their ability to keep you fuller longer. However, the flexibility to choose is crucial, and breaking down the rigid distinction between 'good' and 'bad' foods is essential for fostering a healthier relationship with eating.
Fats
Calories: 9 calories per gram.
Overview: Fats play a vital role in essential dietary products like Nutella, bacon, and peanut butter. Jokes aside, fats often receive undue criticism due to their high calorie density. However, they are crucial for normal bodily functions, serving as the foundation for key hormones, providing nerve insulation, and supporting skin and hair health, among other benefits.
Fats come in various forms, including saturated, monounsaturated, and polyunsaturated fats. Among these, the primary types to focus on are trans fats, omega-3 fatty acids, and omega-6 fatty acids.
Trans fats, often referred to as 'frankenfats,' have been consistently linked to an increased risk of coronary heart disease and should generally be avoided. They are commonly found in packaged foods and certain types of margarine.
On the other hand, omega-3 and omega-6 fatty acids are considered essential. Like essential amino acids, your body cannot produce them on its own, so they must be obtained through your diet. Omega-3s are abundant in fatty fish, flaxseeds, and walnuts (with animal sources offering better absorption), while omega-6s are prevalent in various vegetable oils.
Determining your macronutrient needs
You can determine your macronutrient targets by following a few straightforward steps:
Calculate your calorie needs
To summarize briefly, your daily calorie needs depend on factors like age, gender, weight, muscle mass, and activity level. Consuming more calories than this amount leads to weight gain, while eating fewer calories results in weight loss.
To determine the precise number, you can use a calorie calculator, though keep in mind these tools provide rough estimates. They often overlook factors like body fat percentage or specific daily activities that influence energy expenditure.
The most accurate approach is to monitor your regular food intake for about a week. If your weight remains stable during this period, it will give you a reliable estimate of your daily calorie needs.
For a steady weight loss rate—approximately one pound per week—you should aim for a daily calorie deficit of 500 calories.
For additional details, we’ve discussed how to calculate your calorie requirements for maintenance and weight loss here.
Allocate your calories across macronutrients
There are two approaches to setting your macronutrient goals. The easiest way is to distribute your calories among nutrients based on a percentage ratio. The most popular ratio is 40:40:20, meaning 40% of your calories go to protein, 40% to carbohydrates, and 20% to fats.
Once you’ve established this, calculating the grams of each macronutrient is straightforward. For instance, if your daily calorie target is 2000 calories and you choose a 40:40:20 split, you can use the following calculations:
Carbohydrates
40% of your calories are allocated to carbohydrates.
2000 x 0.4 = 800 calories.
Since carbs contain 4 calories per gram, you’ll need 200 grams of carbohydrates (800 ÷ 4 = 200).
Repeat the same process for protein and fats.
Other common percentage splits include 33:33:33 (equal calories from each macronutrient) and 40:30:30 (40% protein, 30% carbohydrates, 30% fats).
Another approach is to calculate your protein needs first and then allocate the remaining calories to carbohydrates and fats based on your dietary preferences. For instance, a 160 lb. woman aiming to reach 120 lbs. might determine she needs 1,500 calories and 120g of protein. After subtracting protein calories, she has 1,020 calories left for fats and carbs (1500 - 480 = 1020). If she splits these evenly, she’d aim for 510 calories each, resulting in approximately 55g of fat (510 ÷ 9 = 56.7) and 125g of carbs (510 ÷ 4 = 127.5).
What to do if your macros aren’t effective
These targets might not work perfectly immediately. Everyone’s needs differ based on their background, preferences, and daily activities, so experiment with them for a few weeks. If issues arise, adjust them as needed.
Here are some troubleshooting tips based on the most common issues my clients and I have faced.
If you’re not losing weight
If you believe you’ve adhered to your macros but aren’t seeing results on the scale, it’s often due to two reasons: inaccurate tracking or overestimating your calorie needs.
For the first issue, consider weighing your food for precise tracking. Volume measurements can be misleading since they’re easier to manipulate. For example, a generously heaped tablespoon of peanut butter might still be called a 'tablespoon,' even if it’s more than the standard amount.
If you’re confident in your tracking and not overindulging on cheat days, try reducing your calories (and macros) by 5 to 10 percent and monitor your progress.
If you’re insulin resistant, consider reducing your carbohydrate intake and increasing your fat intake while maintaining the same total calorie count.
If hunger becomes a problem
First, determine whether your hunger is physical or emotional. If it’s emotional, you might want to explore intermittent fasting to help manage longer periods without eating.
Your diet needs to be sustainable, so if physical hunger is a challenge in the initial weeks, it’s unlikely you’ll stick with it. Ensure your calorie goals aren’t too restrictive and that you’re consuming sufficient protein. If these factors are balanced and you’re only a few days into your diet, wait to see if hunger diminishes by the second week.
If nothing else works, increase your calories by 10 percent, distributing the increase evenly between carbohydrates and fats. If your calorie deficit is appropriate, physical hunger shouldn’t be a significant issue early on.
If your macros interfere with your social life
The reality of dieting is that you can’t eat everything you desire. However, you should still have enough variety to prevent boredom and occasionally enjoy sugary treats or alcohol while staying within your macro goals.
If your social lifestyle makes it difficult to meet your macronutrient targets, consider swapping some protein for carbohydrates and fats while keeping your calorie intake consistent. This adjustment can provide more flexibility in your dietary choices.
There are additional details to consider with macronutrient tracking, such as managing macros when dining out and interpreting nutrition labels. Fitness coach Mike Vacanti offers a detailed guide for further insights, but these basics should help you get started. If traditional calorie counting hasn’t worked for you, trying macros might be a worthwhile alternative.
