Protein: How Much Do You Need?

I found this article By Laura Dolson online and had wanted to post it here on my blog. It is full of very good information.

What is protein? How much protein do we need? Is it possible to eat too much protein? These are important questions for people following a low carb way of eating, who usually are replacing part of their carbohydrate intake with protein.

What is protein?
Protein is one of the basic building blocks of the human body, being about 16 percent of our total body weight. Muscle, hair, skin, and connective tissue are mainly made up of protein. However, protein plays a major role in all of the cells and most of the fluids in our bodies. In addition, many of our bodies' important chemicals -- enzymes, hormones, neurotransmitters, and even our DNA -- are at least partially made up of protein. Although our bodies are good at “recycling” protein, we use up protein constantly, so it is important to continually replace it.

Proteins are made up of smaller units called amino acids. Our bodies cannot manufacture nine amino acids, so it is important to include all these amino acids in our diets. Animal proteins such as meat, eggs, and dairy products have all the amino acids, and many plants have some of them.

How much protein do we need?
Our protein needs depend on our age, size, and activity level. The standard method used by nutritionists to estimate our minimum daily protein requirement is to multiply the body weight in kilograms by .8, or weight in pounds by .37. This is the number of grams of protein that should be the daily minimum. According to this method, a person weighing 150 lbs. should eat 55 grams of protein per day, a 200-pound person should get 74 grams, and a 250-pound person, 92 grams.


Do people who exercise need more protein?
Although it is controversial, there is evidence that people engaging in endurance exercise (such as long distance running) or heavy resistive exercise (such as body building) can benefit from additional protein in their diets. One prominent researcher in the field recommends 1.2 to 1.4 grams per kilogram of body weight per day for endurance exercisers and 1.7 to 1.8 grams per kg per day for heavy strength training.

But shouldn’t protein intake be a percentage of total calories?
Quite a few programs and nutritionists quote percentage of calories, usually in the range of 10 percent to 20 percent, as a way to figure out how much protein a person needs to consume daily. This is a rough estimate of a person's minimum protein needs. It works because usually larger and more active people need more calories, so the more calories they need, the more protein they will get.

Where this falls down is when people are eating diets which are lower in calories for any reason, conscious or not. People who are ill or losing weight, for example, do not need less protein just because they are eating fewer calories.

What happens if we don’t eat enough protein?
Unlike fat and glucose, our body has little capacity to store protein. If we were to stop eating protein, our body would start to break down muscle for its needs within a day or so.

Is it OK to eat a lot more protein than the minimum recommendations?
This is the crucial question for people on diets which are higher in protein than usual, as low-carb diets tend to be. In a review of the research, the National Academy of Sciences reported that the only known danger from high protein diets is for individuals with kidney disease. After careful study, they recommend that 10 percent to 35 percent of daily calories come from protein. They point out that increased protein could be helpful in treating obesity. There is also accumulating evidence that extra protein in may prevent osteoporosis .

Extra protein can be broken down into glucose in a process called gluconeogenesis. On low carb diets, this happens continually. One benefit of obtaining glucose from protein is that it is absorbed into the bloodstream very slowly, so it doesn’t cause a rapid blood sugar increase.

What foods have the most protein?
Meat, fish, eggs, dairy products, legumes, and nuts all have substantial amounts of protein. Helpful information:

Beef
Hamburger patty, 4 oz – 28 grams protein
Steak, 6 oz – 42 grams
Most cuts of beef – 7 grams of protein per ounce

Chicken
Chicken breast, 3.5 oz - 30 grams protein
Chicken thigh – 10 grams (for average size)
Drumstick – 11 grams
Wing – 6 grams
Chicken meat, cooked, 4 oz – 35 grams

Fish
Most fish fillets or steaks are about 22 grams of protein for 3 ½ oz (100 grams) of cooked fish, or 6 grams per ounce
Tuna, 6 oz can - 40 grams of protein

Pork
Pork chop, average - 22 grams protein
Pork loin or tenderloin, 4 oz – 29 grams
Ham, 3 oz serving – 19 grams
Ground pork, 1 oz raw – 5 grams; 3 oz cooked – 22 grams
Bacon, 1 slice – 3 grams
Canadian-style bacon (back bacon), slice – 5 – 6 grams

Eggs and Dairy
Egg, large - 6 grams protein
Milk, 1 cup - 8 grams
Cottage cheese, ½ cup - 15 grams
Yogurt, 1 cup – usually 8-12 grams, check label
Soft cheeses (Mozzarella, Brie, Camembert) – 6 grams per oz
Medium cheeses (Cheddar, Swiss) – 7 or 8 grams per oz
Hard cheeses (Parmesan) – 10 grams per oz
Beans (including soy)
Tofu, ½ cup 20 grams protein
Tofu, 1 oz, 2.3 grams
Soy milk, 1 cup - 6 -10 grams
Most beans (black, pinto, lentils, etc) about 7-10 grams protein per half cup of cooked beans
Soy beans, ½ cup cooked – 14 grams protein
Split peas, ½ cup cooked – 8 grams

Nuts and Seeds
Peanut butter, 2 Tablespoons - 8 grams protein
Almonds, ¼ cup – 8 grams
Peanuts, ¼ cup – 9 grams
Cashews, ¼ cup – 5 grams
Pecans, ¼ cup – 2.5 grams
Sunflower seeds, ¼ cup – 6 grams
Pumpkin seeds, ¼ cup – 8 grams
Flax seeds – ¼ cup – 8 grams


Here's to a new you!
Matthew Eubanks