Protein
Explained
All food is broken down into three basic macronutrients. Carbohydrates, Proteins and Fats. For optimum health we need a proper balance between all the nutrients. If you’ve ever been confused about Protein, read on!
We will go deep in to all the types of protein, what they do, how their formed and how it impacts our bodies.
Protein: It takes protein to make protein. We break down protein into amino acids which are like the building blocks, and the body builds what it needs from those parts. When you think of protein, think of it as structure. What you take in can become part of you. The proteins made in and by our body can be divided into some functional classifications
All animal flesh, eggs milk. (complete proteins and have all essential l amino acids)
Vegetarian: legumes (beans and lentils), grains, nuts, seeds. Smaller amounts in vegetables like leafy greens. There are very few plants that produce complete proteins.
Amino acids are the building blocks of life, a part of us ever since we crawled out of the primordial ooze.
proteins account for 20% our body weight.
Burning protein
If we go back to our furnace model: -Burning protein for fuel, would kind of be like burning coal. Sure, it burns well enough, but it’s an inefficient fuel source using about 25% more calories for the energy produced. Not a bad thing if you are looking to lose weight. We break protein down into individual amino acids before it can be used as fuel, then we have to turn those into glucose. But there is a leftover bits of nitrogenous waste products called amines, these are converted to ammonia, and then shuttled to the liver to get changed into urea, which must be excreted via the kidneys.
(Increased water demand) Large amounts of protein being burned can lead to excess demand on the kidneys, increasing ammonia and urea out put. If the kidneys cannot remove all the urea, it is deposited in the furthest reaches of the body where it is safely out of circulation. Usually these deposits occur in the extremities, like the big toe... crystallizing into sharp, very painful deposits... known as GOUT. Protein metabolism problems are also associated with gouty arthritis.
If you are not consuming enough calories burning protein can be catabolic. In that you are breaking down your muscle tissue for energy, or to rebuild and maintain other tissues or fuel the brain. Think of it as taking apart your , house to heat it. Slowly you start to burn the furniture, the baseboards, unless you find some other source of fuel. Protein metabolism uses Vitamins C, B6, B12, B3, and Folic acid. It is important to ensure that sufficient of these vitamins are consumed in the diet for proper protein metabolism to take place. (i.e. Atkins/Paleo diet) The nitrogenous metabolic wastes must be discarded when protein is used as fuel. Aim to consume between 0.8- 1.2 g/kg bodyweight per day depending on activity and age to maintain or build muscle mass.
Is there such a thing as too much protein?
Protein Excess Conditions, found in Bodybuilders (or those trying) other carnivores and Paleo or Atkins aficionados.
Risk
Increased kidney problems due to high urea metabolism
Risk of liver problems as ammonia is transformed to urea, which also makes up for kidney burden. (May present as a gout attack where excess urea is stored in joints far away from organs, so usually toes)
Elevated cholesterol associated with higher fat content in animal proteins
Bone loss = osteoporosis and periodontal disease as a result of acidic blood conditions (amino acids- get it? They are acidic)
Certain bowel flora love protein, too much can upset your bowel flora balance in the intestines which can produce toxins leading to autointoxication (especially if transit time is slow) In North America we consume more protein than in any other nation.
Am I getting enough Protein?
Protein deficiency can occur if the diet is lacking, or if there are digestion problems. The stomach acid denatures (unravels the proteins) proteases (enzymes) then randomly split the peptide bonds between amino acid chains, turning them into polypeptides, and then peptidases enzymes) further digest them to amino acids. Only single amino acids are capable of being transported (absorbed) through the walls of the intestines into the blood stream. They are then transported to the liver through the bloodstream. There is what is called an amino acid pool in the liver, a small amount of essential amino acids are stored there until needed to build something. To help unravel proteins they must be sufficient stomach acid. If your digestion is inadequate or you ate too many Rolaids or Tumms with dinner, you would not have sufficient acid to unravel the protein strands so that they could be broken down by enzymes into small enough particles (amino acids) to be absorbed. Because you don’t have enough protein in your system, you can’t maintain or repair your stomach lining and the protective mucosal layer, as a result acid indigestion increases, so you take more acid inhibitors further weakening your digestive system... see the pattern? Ask yourself why there are so many acid reflux medications on the market? With this pattern, you will never get better and always need the product.
Protein Deficiency results in impaired repair and growth leading to symptoms such as:
Excess fluid retention (Edema) in hands and feet common side effect in chemotherapy due to low blood albumin levels.
Nausea and dizziness.
Anemic conditions low hemoglobin levels, lack of circulating oxygen= hypoxia.
Lowered immunity - frequent infections and colds (Antibodies are protein)
Muscle wasting
Premature aging (collagen cross linking)
Cataracts (also cross-linking of proteins)
Low hormone levels (i.e. decreased testosterone)
Declined liver enzyme activity (digestion)
Muscular in coordination (neurotransmitters)
Fatigue and weakness
Upset Acid/alkaline balance
Slow wound healing
Mind, mood memory problems
If you have any of these symptoms examine your diet carefully and check to see you are getting at the very least 0.6 to 1.0 grams of protein per kilogram of body weight. If you intake is sufficient, you can look to how efficient your digestion is and if it needs help.
Other Causes,
An under active stomach, in that the stomach does not produce enough enzymes for the proper digestion of foods resulting in maldigestion, and symptoms of protein deficiency.
There is some competitive competition for absorption, to ensure a balance; you must consume a balance of complete amino acid profiles. So either animal protein, or a mix of vegetarian protein sources must be consumed every day. Meat is the only well balanced complete protein, that is it contains all 8 essential amino acids in a ratio that the body can absorb and manufacture common body proteins as needed.
When you consume a strictly vegetarian diet, the limiting factor is which essential amino acids are lowest. Like the car factory assembly line, we need all parts to build a car (complete protein). On the other hand we only have limited storage space (amino acid pool) for the essential amino acids we do have in stock. Combining different types of vegetarian sources can improve the usability of both foods, otherwise they are burned as fuel.
Some amino acids have therapeutic actions which nutritionists and healthcare practitioners can use when helping someone with health problems. However, high amounts of single amino acids should not be used for more than a couple of weeks before time off because it can create an amino acid imbalance in the body.
Structure of Proteins
Proteins are groups of amino acids linked together, and depending on the order of the amino acids, the links of amino acids fold into different shapes. These shapes form structures and depending on the level of folding and size they form structures:
Structure can be linear, 2º 3º 4º has to do with shape and function, and that depends on what they are used for.
Types of Proteins:
Fibrous proteins: which are inedible and insoluble in water are used for structure
Collagen (sound familiar gives our skin that fullness and smoothness)
Actin (in muscle)
Keratin (skin/hair)
And globular proteins: which are soluble in water, and for non-structural purposes.
Growth and maintenance (Muscle, and repair)
Enzymes - metabolic processes like digestion, up to 100,000 per cell.
Myosin - movement (with Actin in muscle)
LDL, hemoglobin, hormones (insulin)- Transport lipids/oxygen
Antibodies and fibrinogen -blood protein for immunity and clotting
Storage of nutrients- casein in milk, and ovalbumin in eggs
Brain Function- brain chemicals, neurotransmitters
Fluid salt balance (albumin in blood maintains osmotic pressure)
Acid- alkaline balance - buffering agents
Proteins are comprised of linked smaller molecules called polypeptides, which are made up of tiny individual molecules called amino acids. There are 22 in total with 9 being essential. Essential in that we cannot manufacture them, we must intake them through our diet in order to have all the building blocks to maintain our body and organ systems. The same amino acids we use to grow and repair muscle are the same amino acids used to make digestive enzymes and repair intestinal linings and cells damaged by toxins and free radicals. We can form more than 50,000 unique proteins and 20,000 different enzymes. The body will synthesize protein only until it runs out of one of the essential amino acids, the remaining amino acids will be burned as energy or stored as fat.
No one plant source contains all the essential amino acids in an ideal ratio, so more than one kind of vegetarian protein must be consumed to ensure the proper ratio of amino acids. The liver keeps an amino acid pool of essential and non-essential amino acids like a car factory; if one part is missing the whole line gets shut down. So while it is not necessary to consume all 9 amino acids in the same meal, the daily total should have some of every amino acid to prevent deficiencies.
Plant sources: Complement
Corn Legumes (beans, peas, lentils)
Grain Cereals Legumes (beans, peas, lentils)
Legumes (beans, peas, lentils) Grains
Rice Legumes (beans, peas, lentils)
Soybeans Nuts, seeds
Vegetables Legumes (beans, peas, lentils)
Protein synthesis is a result of our DNA... we all have a code in us, and each protein has a specific sequence of amino acids programmed in this code. Every Enzyme, every antibody, every structural part is determined by our DNA.
Protein foods
Better choices, -lower fat to protein ratio)
Beef all visible fat trimmed
Lean broiled
Top Round steak or home ground
Tenderloin
Poultry Chicken/Turkey
Breast skin removed
Ground cooked and rinsed
Boiled (soup with fat skimmed off)
Dairy
Cottage cheese 1% or fat free
Milk Skim
Skim milk cheeses (low fat)
Yogurt fat free no sugar
Sour cream 1%
Pork
Tenderloin (well trimmed)
Avoid all processed meats or use sparingly.
Fish
Salmon (occasionally)
Tuna
Haddock
Halibut
Scallops
Mussels
Crab
Clams
Oyster
Shrimp
Sole
Beans & Seeds
Chick Peas
Navy Beans
Pinto Beans
Pumpkin Seeds (raw)
Soy milk (watch added sugar)
Soy Tofu- max 1serving/day.
Nut milks (again watch the sugar)
Limit (fat to protein ration too high)
(Too calorie dense for what you get)
Beef
Porterhouse
Short Ribs
Ground Beef
T-bone
Poultry
Chicken Drum or thigh with skin
Wings
Duck
Goose with skin
Dairy Full fat sources
Brie
Cheddar
Cream Cheese
Mozzarella
Ricotta
Swiss
Cream Whipping/ half and half
Sour Cream (full fat)
Ice Cream
Milk Homo
Pork
Bacon
Loin chop
Spare ribs
Ham
Sausages
Lunch Meats
Salami
Bologna
Hot dog
Pâté
Other foods
Pizza
Take-out Sandwiches
Fish sticks/chicken fingers
Avoid as much prepackaged foods as you can