What's Eating You? Day 3: Protein: The Building Block

Protein is a macronutrient that is made of of amino acids. An amino acid is a molecule that serves as the building block of proteins. Each amino acid is comprised of carbon, hydrogen, oxygen, and nitrogen atoms. There are 20 amino acids that the human body uses. Nine of them are considered essential amino acids because the body cannot produce them, and must therefore be included in the diet. The remaining eleven amino acids are considered nonessential because they are produced by the human body.

There is critical role played by protein in virtually every major bodily system. It provides structure to muscle and tissues, it regulates cell functions, it helps to maintain fluid and acid-base balance, it assists with circulation, and it is a backup source of energy in the absence of carbohydrates. Protein enables proper functioning of the nervous system and the immune system.

Protein is found in a variety of foods. These foods are classified as complete and incomplete proteins. Complete proteins supply the body with all of the essential amino acids in very high amounts. Incomplete proteins must be combined with other protein-containing foods to meet daily dietary needs. Generally speaking, complete proteins are animal-based foods like meat and dairy while incomplete proteins are plant-based like fruits, vegetables, grains, and beans/legumes.

Of the total calories consumed daily, 12-20% should be protein. For example, if 2,000 calories are consumed, 240-400 calories should contain protein. Because complete proteins contain animal fat which could elevate cholesterol levels in the body, it is wise to look to plant-based proteins. Here are some examples of foods which are high in protein: navy beans, lentils, black beans, brown rice, quinoa, spinach, sunflower seeds, and broccoli.

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What's Eating You? Day 2: Carbohydrates-The Master Fuel

Carbohydrates are a class of organic compounds made up of carbon, hydrogen, and oxygen. They are most commonly grouped as simple and complex carbohydrates. Depending on your age, gender, and level of physical activity, carbohydrates should range from 45-65% of the total calories that you consume daily. For example, a 2,000 calorie diet should be comprised of 900-1300 calories. They are the body's master fuel for all metabolic processes. Carbohydrates are the single most important source of energy in the body. They also provide dietary fiber for regularity and heart health.

Carbohydrates are often viewed as the enemy to maintaining a healthy weight. The trick is to consume more whole grains and dairy, beans, fruits, and vegetables and to avoid highly refined foods like white bread, white rice, sugary cereals, white pasta, crackers, and donuts.

In later posts, we will explore how to successfully integrate carbohydrates into your diet to maximize energy, maintain weight, and to promote overall health.

Terms to Know:

1)  simple carbohydrates- simple sugars that exist as either single sugar molecules or two single sugar molecules linked together; examples include sucrose, molasses, honey, maple syrup, and turbinado sugar.

2)  complex carbohydrates-  carbohydrates that are composed of two or more simple sugar molecules linked together; examples include whole wheat bread, whole grain cereals, brown rice, whole wheat pasta, oatmeal, quinoa, whole milk, beans, lentils, fruits, and vegetables.

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What's Eating You? Day 1: Does Nutrition Even Matter?

When you do the math, consuming more than calories than your body uses leads to weight gain. Conversely, when you consume fewer calories than your body uses, then you lose weight. Maintaining a healthy weight is important to disease prevention. The heavier you are, the greater your risk of developing high cholesterol, hypertension, heart disease, and diabetes for starters. Obesity throws mobility issues, increased risk of cancer, and upper respiratory ailments like asthma and sleep apnea on the pile. It would seem that the simple solution is to just eat less and move more. So, does it even matter where the calories come from? The simple answer to this question is a resounding "YES"!

Being thin and looking fit doesn't necessarily equate to being healthy. To function efficiently and repair itself, the human body requires the right mix of macronutrients (carbohydrates, proteins, and fats), micronutrients (vitamins and minerals), and water. Consuming foods that lack nutrients will eventually lead to declining health and sickness. Some physical signs of nutritional deficiencies include tooth decay, aging skin, thinning hair, brittle nails, weak bones, low energy, poor vision, weak muscles, poor posture, and weight gain.

This week we will learn how the foods that we eat affect our overall health conditions:

Tuesday, February 14, 2012 Carbohydrates

Wednesday, February 15, 2012 Proteins

Thursday, February 16, 2012 Fats

Friday, February 17, 2012 Vitamins and Minerals

Terms to Know:

1)  Macronutrients- These include carbohydrates, proteins, and fats and are classified as such because they have caloric value and the body has a large daily need for them.

2)  Micronutrients-  Vitamins and minerals are classified as micronutrients because the body's daily requirements for these nutrients are small.

(Source: Practical Applications in Sports Nutrition 2nd edition, Fink, Burgoon, and Mikesky, 2009.)

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