Join Now!      Login

Whole Person Wellness Program Wellness Model
Skip Navigation Links
Health Centers
Key Services
Which of the following is an antioxidant?
Vitamin E
Vitamin B

 Amino Acid Requirements: Amino Acid Requirements 
There are definitely specific requirements for proteins, though the exact amount is somewhat questionable. The Recommended Daily Allowance (RDA) of protein according to U.S. government standards is 0.8 gram per kilogram (1 kilogram equals 2.2 pounds) of ideal body weight for the adult. Ideal body weight is used in the calculation because amino acids are not needed by fat cells, only by the lean body mass. So an adult male who should weigh about 154 pounds, or 70 kilograms, requires 56 grams of protein daily. A female whose best weight is 110 pounds, or 50 kilograms, needs 40 grams a day. The RDA increases by 30 grams per day during pregnancy and 20 grams per day during lactation. During growth, different amounts are needed. For example, 2.2 grams of protein are needed per kilogram of body weight each day in the first six months of life, and 2.0 grams per kilogram for the next six months.

Daily Protein Requirements

Age RDA*
0–6 months2.2
6 months–1 year2.0
1–3 years1.8
4–6 years1.5
7–10 years1.2
11–14 years1.0
15–18 years0.9
19 years and older 0.8

*(in grams per kilogram [2.2 pounds] of body weight)

These requirements are based on maintaining a positive nitrogen balance in children and an even to positive nitrogen balance in adults. Protein is the nitrogen-containing nutrient. As it is broken down for excretion, it must be replaced by dietary nitrogen so protein formation can continue. In the healthy adult, nitrogen equilibrium, or zero balance, is the ideal, while a positive nitrogen balance is needed during times of illness and healing. In children, when growth is occurring regularly, a positive nitrogen balance is necessary, as it is in pregnancy.

As discussed in the previous section, Food Complementarity, the protein requirements are also based on the protein quality, as measured by the biological value (BV). Protein is also measured by the way it supports growth; this measurement, called the protein efficiency ratio (PER), is determined by feeding an animal a particular protein food and measuring its growth.

The reference protein for determining the biological value of foods is that of eggs (ovalbumin), the food with the highest BV at 94 percent (although mother's milk is valued at 100 percent). Next are fish at 75–90 percent, rice at 86 percent, legumes at 70–80 percent, and meats and poultry at 75–85 percent. Corn, an incomplete protein, has approximately 40 percent biological value.

(Excerpted from Staying Healthy with Nutrition ISBN: 1587611791)
CONTINUED    1  2  Next   
 Comments Add your comment 

 About The Author
Elson Haas MDElson M. Haas, MD is founder & Director of the Preventive Medical Center of Marin (since 1984), an Integrated Health Care Facility in San Rafael, CA and author of many books on Health and Nutrition, including ...more
 From Our Friends
Popular & Related Products
Popular & Featured Events
Wellness Inventory Certification Training
     April 3-July 3, 2018
     Los Angeles, CA USA
2018 National Wellness Conference
     June 18-20, 2018
     St. Paul, MN USA
Additional Calendar Links
Dimensions of Wellness
Wellness, Movement, dimension!

Home       Wellness       Health A-Z       Alternative Therapies       Wellness Inventory       Wellness Center
Healthy Kitchen       Healthy Woman       Healthy Man       Healthy Child       Healthy Aging       Nutrition Center       Fitness Center
Discount Lab Tests      First Aid      Global Health Calendar      Privacy Policy     Contact Us
Disclaimer: The information provided on HealthWorld Online is for educational purposes only and IS NOT intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek professional medical advice from your physician or other qualified healthcare provider with any questions you may have regarding a medical condition.
Are you ready to embark on a personal wellness journey with our whole person approach?
Learn More/Subscribe
Are you looking to create or enhance a culture of wellness in your organization?
Learn More
Do you want to become a wellness coach?
Learn More
Free Webinar