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The amount of protein needed each day depends on a person's age and sex. Adult women need approximately 46 grams of protein per day, while adult men need 56 grams, according to WebMD.


Bodies need protein to support a wide range of physiological functions. Some examples include the formation and repair of cells, tissue, bones, skin and muscles.


Protein plays a role in several basic but important bodily functions, which primarily include building muscle and bone. Protein is a dietary nutrient needed by all people, regardless of age, gender and activity level. All individuals need some amount of dietary protein to prevent muscle loss, stimul


It is possible to eat too much protein and exceed the body's daily requirement for the nutrient, which leads to weight gain. Excessive protein intake can also create complications with the brain, liver and nervous system.


Eating too much protein can lead to dehydration, weight gain, nutritional deficiencies, an increased risk of heart disease, seizures, an increase in liver enzymes and kidney problems. Lack of protein prevents the body from being able to build muscle.


Excess protein in the diet combined with restricted carbohydrates can cause harm to the kidneys, dehydration, a decline in muscle mass and bone calcium, and create strain on the heart. Protein should account for 10 to a maximum of 35 percent of daily calories.


The recommended daily protein intake for adult women is 46 grams. This dosage increases to 71 grams among women who are pregnant or breastfeeding, according to WebMD.


Plants need protein for healthy growth and development. One of the critical roles of protein in plants is regulating phototropism and mediating the response of plants to light-dark cycles. Proteins are also involved in energy-generating reactions, intracellular structure and membrane transport.


There are 8 grams of protein in a cup of milk. This includes both types of protein found in dairy products, casein and whey. Casein provides 80 percent of the total protein, while whey provides the remaining 20 percent.


One egg provides six grams of protein, or 13 percent of the recommended Daily Value. Nearly half the egg's protein is contained in the yolk. Eggs are considered to have one of the highest protein values of any food available.