By Jim Duffy
During the early stages of most kidney diseases, the patient
will be advised to limit protein intake to some degree. Because protein is so
vital to the entire body, this limitation should only be made under doctor's
orders and with the guidance of a dietitian or nutritionist. The protein that
is left in the diet at this point will be high-quality with certain additional
restrictions as well. However, once the patient reaches end stage kidney disease,
the restriction on protein will not only end but the patient will also need to
increase intake.
The level that is suggested at this stage is double that of
the average diet and may be hard to achieve with a normal diet for a number of
reasons. Protein supplements will be beneficial because they are high in
protein and can be high in calories, helping to reach the right amount as
suggested by the doctor, and they may be easier to tolerate than trying to eat
large meals.
In Stage I through IV, the protein level is restricted, with
the strictest restriction at Stage IV, the final stage before dialysis becomes
necessary. In this stage, dietary protein may be as low as 10%, but again, only
with a doctor's guidance. Excess protein at this point will lead to nausea and
vomiting, a loss of appetite, weakness and itching that is sometimes intense.
To put this into perspective: the average diet is 14-18% protein and the
average vegan diet is 10-12% protein.
Not only is the amount of protein limited, but the type of
protein may be limited as well. Vegetarian protein sources might be suggested
in Stage IV so that protein can still be included in the diet but will also
slow the progression of chronic kidney disease. A vegetarian diet gets protein
from plant sources, which can be digested with less protein waste buildup. It
also works to maintain the levels of sodium, potassium and phosphorous.
Limiting the amount of phosphorous in the diet is important
because it can deplete calcium in the body and may cause or worsen
osteoporosis. Protein itself can cause this problem by causing too much calcium
to be eliminated from the body through urination, even when the kidneys are
healthy and functioning properly. In kidney disease, however, electrolyte
imbalances can be common and certain minerals will compete with one another.
These foods that need to be limited include bran cereals, dried beans, brown
rice, lentils, salmon, organ meats, sardines, chocolate and cola. Dairy foods
are also included on this list of limitations, especially skim milk.
Once the end stage of chronic kidney disease has been
reached, food needs will change dramatically, including a huge increase in both
protein and calories to keep the weight steady despite a greatly decreased
appetite. The calories have to be high enough to prevent muscle wasting and
will be based on "dry" weight. Dry weight is calculated by estimating
actual weight minus the fluid retained. The amount of recommended protein is
based on this number.
Average Need vs. End Stage Needs
The average person's protein intake is decided by gender,
health and activity levels. For a very sedentary person, that need may be as
low as around.4 grams per kilogram of body weight. For a very active person,
that need can increase to.8 to 1 gram of protein. Even a bodybuilder will not
need an extreme amount of protein and may only need around 1.2 to 1.5 grams of
protein. The American Heart Association recommends that the diet not be over
35% protein, however, that need might change with end stage renal failure.
The average protein needs throughout life are as follows:
Age Grams of protein per kg of body weight
- Newborn to six months: 2.2 kg
- Six to twelve months: 2.0 kg
- One to three years: 1.8 kg
- Four to six years: 1.5 kg
- Seven to ten years: 1.2 kg
- Eleven to fourteen years: 1.0 kg
- Fifteen to eighteen years:.9 kg
-Nineteen years and beyond:.8 kg
For those who are in Stage V renal failure, there will be a
minimum protein requirement of 1.5 to 2 grams per kilogram of weight(dry), with
the additional suggestion of getting about 25% of their protein at every meal
and to include supplements and snacks to get to the right level of protein. The
patient will be told to get their protein from meats, frequent egg dishes since
egg is the perfect protein and high protein supplements.
Supplement Options
Because end stage renal failure can cause nausea and
vomiting as well as decreased appetite, it is important to get high quality
protein as well as high calorie counts in the easiest way possible. Supplements
can be beneficial because they are easier to consume, they are high in soluble
and digestible protein and they can be more appetizing than trying to eat
foods. It is easier to pop open a supplement and drink it down than it would be
to sit and try to make it through a whole meal. Because kidney disease may also
cause taste changes, foods that were once favorites may not be as appealing any
longer.
Supplements can be either powder, already mixed shakes,
supplement shots and protein bars.
Protein Powders - There are four protein powder sources:
rice, whey, soy and egg. The powders can be either from a single protein source
or a combination of two or more. Anyone with known or suspected food allergies
should stick with single ingredient protein supplements for safety. Vegans can
use both rice and soy protein powder supplements.
Protein Shakes - Shakes that are already mixed and ready to
go are fairly common and can save time and be more convenient to use. They
should have enough calories in each serving as well as be a high quality
protein. Diabetics should stick to the protein shakes that are recommended to
them by the doctor; there are several brands that are created specifically for
them.
Protein Supplement Shots - An even easier way to get the
right amount of protein is with the liquid protein supplement shot.
Protein Bars - The protein bars typically have a number of
different dessert-like flavors that might be appealing, however, make sure that
they do not have a lot of additional sugars in them which can be hard on the
immune system. They should still have plenty of protein in them. One popular
brand has 180 calories, 12 grams of protein and limited sugar, making it a good
snack choice.
About Protica Research
Founded in 2001, Protica, Inc. is a nutritional research
firm specializing in the development of protein-rich, capsulized foods (dense
nutrition in compact liquid and food forms). Protica manufactures Profect
protein beverage, IsoMetric, Fruitasia and more than 100 other brands in its
GMP-certified, 250,000 square foot facility.
You can learn more about Protica at http://www.protica.com
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