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Macronutrients: The Big Rocks

By Rob | In Announcements, Coach's Blog, Nutrition | on July 31, 2017

Macronutrients are essential nutrients that are needed in large amounts on a daily basis. If we consider our daily intake of food as a jar to fill, macronutrients would be the big rocks that take up the bulk of the room in the jar. 

These important nutrients help run the ship of our body as each one has important functions to keep our body sailing smoothly.  Macronutrients are carbohydrates, proteins, and fats. Some sources consider water a macronutrient as well.

Although Alcohol is not a macronutrient, I want to add it to this discussion as it is perhaps one of the most misunderstood substances and most controversial. In this article I will get into each of these individually as over the years in fitness and owning CrossFit West Houston, I have seen that there can still be confusion as to foods are what macronutrients. Hopefully, this will bring clarity.

We eat food and food is comprised of macronutrients.  While most food is predominately one macronutrient, there are elements typically of one or more macronutrient.  For instance, broccoli is a carbohydrate but it also has some fat and some protein. Let’s get in to a little more detail.



A carbohydrate (carb) is organic molecules typically classified according to its structure. There are two types of structures of carbohydrates: Simple and Complex Carbohydrates. Carbs have several functions in the body: quick energy, regulating blood glucose, breakdown of fatty acids and providing dietary fibers.

Simple are made of one or two sugars (monosaccharides or disaccharides). They are typically quick and easy to break down in the body thus quickly absorbed.  These tend to be your “fun” foods pasta, cake, cookies, ice cream, sugar sweeteners, fruit juices and the much maligned high fructose corn syrup.  These types of carbs can cause a big spike and drop of insulin which can lead to a yo yo of energy and hunger as they do not help manage blood sugar well.

Complex Carbs have more than two sugars linked together. Given their structure they are slower to digest and absorb, so they stay with you longer which helps manage blood sugar. These types of carbohydrates are vegetables, fruits and starches. The other advantage of this type is that they are high in fiber which manages hunger.


Simple Carbs Complex Carbs
Sugar Vegetables
High Fructose Corn Syrup Fruits
Baked Goods Whole grains
Ice Cream Beans
Soda Nuts
Fruit Juices –Starches
Pasta Potato
Sweeteners Rice
  Whole Wheat Bread


Carbohydrates can be very controversial. Some people suggest high carbs, some low carbs, some all carbs and some no carbs. It is easy to see why there is such confusion about what to eat and how much. Unfortunately, there is no definitive answer of how much to eat as it is really dependent upon the individual. Some things that can affect how much to eat:

  • The size of the individual
  • The body composition (lean mass and body fat)
  • Activity level
  • Length and intensity of activity
  • Age and stage of life
  • Amount of other macronutrients
  • Genetics
  • Individual taste and food preference s

Here are some general guidelines to assist in types and amounts:

  1. Abundantly eat plant based carbs ie; vegetables and some fruit. When eating real food like vegetables and fruits choose the colors of the rainbow in food choices (red, orange, yellow, green, blue, indigo, violet). Ideally daily get 1-2 servings each day of the different colors.
  2. Strictly limit your simple carbohydrates. If you do consume them, try to consume the after a bout of exercise.
  3. Limit the quantity of starches especially if your goal is weight loss/management.
  4. Eat carbs at every meal.



Proteins are organic molecules made up of amino acids. Those amino acids are comprised of essential amino acids, conditional amino acids and non-essential amino acids. Essential amino acids cannot be produced inside the body so they must be ingested through food. Conditional Amino Acids cannot always be made in amounts our bodies need (typically times of stress) .Non-essential amino acids are easily produced within the body.


Essential Amino Acids Conditional Essential Amino Acids Non-essential  Amino Acids
Histidine Arginine Alanine
Isoleucine Cysteine Asparagine
Leucine Glutamine Aspartic Acid
Lysine Tyrosine Glutamic Acid
Methionine   Proline
Phenylalanine   Serine

We need protein to survive and thrive. Protein supports many functions of the body:

  • Molecule production (enzymes, hormones, neurotransmitters, antibodies)
  • Cell replacement
  • Tissue growth and repair
  • Immune function
  • Weight management
  • Increase satiety
  • Metabolism
  • Athletic Performance


Protein Sources
Lean Meats
Protein Powders


Here are some guidelines and rules:

  1. Have protein at every meal. It is important to keep a continuous supply of protein.
  2. Vary your sources of protein to ensure to consume a variety of the important amino acids.
  3. Consume enough to fuel and repair for your activity.

Like carbohydrates the amount of protein to consume depends on a few factors. The main one being activity level. If you are active your protein needs are much higher. It will typically be .64 to .9 g per bodyweight in lbs.



Fats are organic molecules made up of carbon and hydrogen elements combined together to make hydrocarbons. There are many different types of fat with unique characteristics i.e. saturated fats and unsaturated fats.  Luckily we have moved past the notion that all fat is bad, however we do need to be selective on the fats that we choose.

Not all fats are created equal; there are some fats that are unprocessed and some that are highly processed. The best way to determine if a fat is healthy or non-healthy is how processed and perishable it is. If it is perishable and unprocessed than you should consume it examples are animal fats, nuts seeds, and oils such as coconut, avocado, olive oil.  If it is highly processed than you should not consume it, examples are trans-fat and hydrogenated fats and oils like vegetable, canola, safflower and sunflower.


Saturated Monounsaturated Polyunsaturated  
Animal Fats Olive Oil Omega-3 Omega-6
Tropical Oils Avocados Flax Most Seed Oils
     -Coconut Peanuts Fish Oil    -Canola
     -Palm groundnuts      -Safflower
     -Caca0 Tree Nuts    -sunflower


For many years fat was considered an enemy, and many experts recommended a low to no fat diet. The reality is that we need fat and it is an important nutrient.  Fat has several major roles in the body:

  • Provides energy
  • Makes and balances hormones
  • Forms cell membranes
  • Forms brain and nervous system
  • Transport fat soluble vitamins A, D, K and E
  • Provides two fatty acids that the body cannot make: linoleic acid and linolenic acid

There are other benefits from consuming fat as well. There is strong evidence that fat:

  1. Provides cardiovascular protection
  2. Improves body composition
  3. Reduces depression

Additionally, there is some evidence that fat:

  1. Prevents cancers
  2. Preserves memory
  3. Preserves eye health

There is a pretty strong case to eat fat. We could not function without it.

Here are some general guidelines:

  1. Eat a small amount of fat at every meal.
  2. Strive to eat unprocessed fats.
  3. And vary fat types to get a wide range of benefits.



Technically alcohol is not a macronutrient. It provides no nourishing attributes to the human body. But it is consumed so I am going to address it here. In full disclosure, I do occasionally drink alcoholic drinks, sometimes wine, sometimes beer and sometime margaritas. I do so with full knowledge of the consequences.

Alcoholic beverages have calories but provide absolutely no nutritional benefit to you, which make them empty calories. Going back to our daily jar of food analogy, if Alcohol “rocks” take up too much room in your jar, you’re trading Alcohol for healthful foods in your diet.  You can monitor the calories by eating less food to make up for the calories that you consume but this means that you will miss out on the vital macronutrients that food supplies and are necessary for overall health. In addition, you also miss out on vital micronutrients, which we’ll cover in an upcoming post.

Here are some drawbacks with alcohol consumption:

  • Overconsumption that leads to poor food choices (aka Whataburger at 3 am)
  • Potential for weight gain
  • Disrupted nutrient uptake
  • Disrupted sleep
  • Disrupted hormones
  • Disrupted protein synthesis

As they say, think before you drink. Do a cost benefit analysis. Is having the alcohol worth the potential negative affects?

Hopefully, this helps explain what each macronutrient is, what foods are what macronutrient and how they benefit us.  Remember it is important to consume each nutrient daily. They are the big rocks that fuel the machine that is the human body.

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