Protein is the second most abundant substance in our bodies after water. It constitutes three-fourths of the dry weight of most body cells. It is involved in the biochemical structure of genes, blood, tissue, muscle, collagen, skin, hair, and nails. It's also a major constituent of all the many hormones, enzymes, nutrient carriers, infection-fighting antibodies, neurotransmitters, and other chemical messengers in the body - just for starters. This continuous cell-building and regeneration necessary for life requires non-stop supplies of protein.
There are no universally accepted dietary requirements for protein. However, the World Health Organization recommends 0.3 to 0.4 grams per kilogram (2.2 pounds) of body weight per day, or about 30 to 40 grams for an average adult male weighing approximately 150 pounds. The protein consumed must be high-quality and contain all or most of the essential amino acids.
Poor digestion, infection, stress, drug use, age, etc. are factors that influence the availability of them. As long as the body has a reliable source of dietary proteins containing the essential amino acids, it can adequately meet most of its needs for new protein production. But the removal of even one essential amino acid from the diet leads rather rapidly to a lower level of protein synthesis in the body, which sooner or later, will lead to some type of physical disorder.
Eric R. Braverman, M.D.
Dr. Braverman is a Summa Cum Laude and Phi Beta Kappa graduate of Brandeis University and NYU Medical School, did brain research at Harvard Medical School, and trained at an affiliate of Yale Medical School. He is acknowledged worldwide as an expert in brain-based diagnosis and treatment, and he lectures to and trains doctors in anti-aging medicine.