Proteins are large biomolecules or macromolecules, consisting of one or more long chains of amino acids residues. They are essential nutrients for the human body. They are one of the bulking blocks of body tissue and can also serve as an energy source for growth and maintenance.

Importance of proteins – Aside from water,  proteins are the most profuse kind of molecules in the body. It can be found in all cells of the body, especially muscles. This also includes body organs, hair, and skin. Proteins are used in membranes and are needed to form blood cells in the body.

Source – Protein can be found in ample range of foods. One must consider digestibility and nourishment profile such as calories, cholesterol, vitamins and essential mineral concentration of the protein source. On a global basis, plant protein foods supply over 60 percent of the per capita supply of protein on average. Also, the meat products from milk, egg, soy, and fish are sources of complete protein. Whole grain or cereals are another sources of protein. Examples of food staples and cereal sources of protein are buckwheat, oats, rye, millet, maize (corn), rice, wheat, sorghum, amaranth, and quinoa. Vegetable sources of protein comprise of legumes (pulses), nuts, seeds, and fruits. Vegetarian foods with protein concentrations greater than seven percent include soybeans, lentils, kidney beans, white beans, chickpeas, cowpeas, Brazil nuts, almonds, pecans, pumpkin seeds, walnuts, sesame seeds and sunflower seeds. The protein content in roots like sweet potato, tubers, and fruits is low. These food staples must be complemented with foods with complete quantity protein content for a healthy life, particularly in children for proper development. A good source of protein is often a combination of various foods because different foods are rich in different amino acids, most are readily available in the human diet. Protein shakes made from protein powder and milk are common bodybuilding supplements these days. The type of protein is significant in terms of its impact on protein metabolic response and possibly on the muscle’s exercise recital.

Protein quality and digestion – There are several systems which rate proteins by their utility to an organism based on their comparative proportion of amino acids and in some systems, digestibility of the protein source. Most proteins are decayed to single amino acids by digestion in the gastrointestinal tract. Newborns of mammals are excellent in protein digestion and absorption. They can absorb unbroken proteins in the small intestine. This enables inactive resistance to milk.

The requirement of protein –  The amount of protein required in a person’s diet is determined by overall energy intake, the body’s need for essential amino acids, body weight, the rate of growth in the individual, physical activity level, a carbohydrate intake of an individual and the presence of any illness. Requirements of protein ingestion increases during pregnancy, breastfeeding, childhood, recovery from malnutrition or after a surgery. Individuals performing endurance activity require more protein than sedentary individuals so as to repair broken muscles during endurance workouts. Proteins help in increasing the performance rate of athletes.  Proteins act as anaerobic fuel when carbohydrates and lipid resources are low. High protein diets enhance metabolic rate and reduce appetite and thus are popular for weight loss regime.

Deficiency of protein – It can lead to a number of ailments including mental retardation and kwashiorkor (a severe form of malnutrition). One type of protein inadequacy causes difficulty in breathing, wheezing and vision problems.

Symptoms of protein deficiency – The symptoms are a headache, volatility, weakness, disorientation, depression, mood swings, lack of mental stability and hair loss.

Excess consumption of protein – It results in protein oxidation. The human body can not store excess protein than required. Increase in protein intake results in an increase in urea excretion. This function of urea excretion is performed by kidneys. Protein intake is recommended to be declined if any kind of kidney disorder happens.

We reach a conclusion that protein is not only needed by our body but by our soul too. Consume right amount of protein in your daily diet to help your body avail optimum benefits of the nutrient. It is not of much harm, so it is better for mankind to slip up on the side of more protein rather than less.