Diet Nutrition Information
Recommended Daily Allowance for Protein (RDA) - Daily Intake of Dietary Protein - Essential Amino Acids for Cell Growth
Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine
Alanine, Arginine, Aspartic Acid, Cystine, Glutamic Acid, Glycine, Hydroxyproline, Proline, Serine Tyrosine

Protein: Daily Needs

Diet Nutrition - Best Weight Loss Diet - Free Diets for Good Health - Diet Advice

Recommended Daily Allowance for Protein

What is Protein?

Protein is an essential nutrient for bodily growth and repair. It makes up 15-20 percent of our body mass. Protein is made from differing combinations of substances called amino acids. Twenty two amino acids can be used by the body to manufacture protein. Composed of carbon, hydrogen and oxygen atoms, as well as nitrogen, they fall into two types: non-essential and essential. See also: Health Benefits and Sources

Amino Acids: Essential and Non-Essential

Both types of amino acid are widely available in food. However, while non-essential amino acids can be produced by the body itself from fats, carbs and other amino acids, the essential ones can't, so they must be obtained from dietary sources. The eight essential amino acids are: isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine. The non-essential amino acid group includes: alanine, arginine, aspartic acid, cystine, glutamic acid, glycine, hydroxyproline, proline, serine and tyrosine.

Functions of Protein in Diet

We use dietary protein to create new cells throughout the body (eg. in organs, muscles, bones) and to maintain or repair existing cells. In addition, dietary proteins are used to produce enzymes, agents that act as a catalyst for a wide variety of biological and chemical processes in the body, including: digestion, cell-building, energy metabolism and fat storage. In fact, nearly all the body's chemical reactions are regulated by enzymes. Protein is also used in the production of neurotransmitters, the chemicals used in the transmission of messages between body cells.

Protein Synthesis - How We Use Dietary Protein

When we eat proteins, our digestive system breaks them down into their basic amino acids, and then our cells rebuild them again, in a different order, to form the particular type of proteins they need. Chemicals left over after protein synthesis are converted to glucose and used for energy. Due to the body's demand for protein, it is essential to include enough in our daily diet. Otherwise we start digesting the proteins in our muscle tissues.

Calorie Content of Protein

One gram of protein contains roughly 4 calories, the same caloric value as carbohydrate, but less than half the calories of fat (9 calories per gram).

Protein: Recommended Daily Allowance (RDA)

According to the US National Academy of Sciences, healthy people need about 0.8 grams of high quality protein, per kilogram of bodyweight - that's just under 0.4 grams for every pound. For example, a 150 pound woman needs about 55 grams of protein per day, while a 170 pound man needs about 62 grams.

People Who Need More Protein in Diet

Individuals who are building new tissue quickly, need more than the standard recommended amount of protein. For example, children need up to 2 grams per kilogram of weight, while young teenagers need up to 1.2 grams. Pregnant women typically need an extra 10 grams of protein a day, while nursing mothers need about 15 grams extra per day for the first six months, and an extra 12 grams a day during the second six months. People suffering blood loss or injuries also need extra amounts of protein.

Nutrition Resources About Protein

Food Sources
Health & Weight Benefits

Back to Diet Advice
For the BEST diet, click Best Diet


BEST DIET | Free Diet Plan | Diet Program to Lose Weight | How to Lose Weight | Calorie Needs | Weight Loss Advice | Free Diets - Special Conditions | Diet Questions | Diet Advice For Men | Best Online Diet Plan | Best Weight Loss Diet Plan | How to Lose Weight Fast | Do Diet Programs Work | Types of Weight Loss Programs | Diet Tips | Best Forum For Diet Support | New Diets and Dieting Articles | Obesity Advice | Weight Chart | Help to Lose Weight | Diet Pills Advice | Side Effects | Xenical Fat Blockers | Meridia Diet Pills | Do Weight Loss Pills Work | Laxatives to Lose Weight | Weight Management Guidelines | Surgery for Weight Loss | Health Risks | Gastric Bypass Diet | Eating Disorders | How to Stop Bingeing | Weight Loss & Exercise | Weight Loss After Pregnancy | Diet Recipes | Diet Newletter | Weight Loss Resources | Diet & Weight Loss Links


Reviews of Diets | Atkins Diet | Cabbage Soup Diet | Cider Vinegar Diet | Fad Diets | Food Combining | Grapefruit Diet | High Fiber Diets | Jenny Craig Diet | Low Calorie Diets | Low Fat Diets | Low GI Diet | Metabolic Typing Diet | Peanut Butter Diet | Scarsdale Diet | South Beach Diet | Sugar Busters | Three Hour Diet | Weight Watchers Diet | Zone Diet | Weight Loss Diet Reviews


Diets for ADD/ADHD | Alcohol & Dietary Health | Diet For Alcoholics | Arthritis Diet | Blood Pressure Diet | Bodybuilding Diet | BRAT Diet | Cancer Diet | Candida Diet | Cholesterol Lowering Diet | Constipation Diet | Crohn's Disease | DASH Diet | Detox Diet | Diabetic Diet Tips | Gluten Free Diet | Healthy Heart Diet | High Protein Diets | Hyperactivity Diet | Indian Diet | Irritable Bowel Diet | Lactose Intolerance | Lactose-Free Non-Dairy Calcium | Low Sodium Diet | Medical Diet | Mediterranean Diet | Menopause Diet | Migraine Dietary Advice | PMS Diet | Renal Diet | Smokers Diet | Vegetarian


Latest Dietary Guidelines | Healthy Diet | Diet For Children | Diet For Teens | Diet Nutrition Advice | Fat in Food | Best Fats | How Much Fat Needed | Guide to Glycemic Index | Guide to Glycemic Load | GI Per Food Serving | GI Values For Food Groups | Carbs & Glycemic Index | Low Carb Diets | Daily Carb Needs | How Much Fiber Needed | Folate Intake RDA | Calcium Intake RDA | Protein Intake RDA | Sugar Intake | Food Calorie Charts provides general information on healthy eating, special diets and weight loss programs, diet nutrition, diet pills and weight loss surgery. However no advice given here is intended as a substitute for professional medical advice. For the sake of your health, always consult your doctor before making any significant dietary, nutritional or lifestyle changes. Copyright 2001-2018 Diet Information. All rights reserved.