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Proteins: Dietary Sources and Requirements

Proteins: Dietary Sources and Requirements

Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...

Role of Proteins in the Human Body

Role of Proteins in the Human Body

Proteins are the building block of life. They are also the most abundant macromolecules with as many diverse roles in the body. They are part of many structural components that provide unique shapes and structures to animal cells, tissues, and organs. In addition, they also act as biological catalysts and carry out several anabolic and catabolic reactions. Notably, some proteins are chemical messengers and regulate many critical processes, such as metabolism, growth, and development. They...

Overview of Protein Metabolism

Overview of Protein Metabolism

Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...

Lipids: Dietary Sources and Requirements

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...

Essential Minerals for Bone Health

Essential Minerals for Bone Health

The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...

Role of Vitamins in Maintaining Bone Health

Role of Vitamins in Maintaining Bone Health

The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...

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Related Experiment Video

Updated: Sep 1, 2025

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

Published on: September 20, 2021

Health Functions of Egg Protein.

Ryosuke Matsuoka¹, Michihiro Sugano^2,3,4

¹R&D Division, Kewpie Corporation, Tokyo 182-0002, Japan.

Foods (Basel, Switzerland)

|August 12, 2022

Summary

Egg white protein offers significant health benefits, including muscle gain and reduced cholesterol. Further research into egg yolk and shell membrane proteins may reveal more health advantages for preventing frailty and metabolic issues.

Keywords:

antifatigue cholesterol-lowering egg egg protein hydrolysate egg white protein visceral fat-lowering

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Last Updated: Sep 1, 2025

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

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Published on: September 20, 2021

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The Multifaceted Benefits of Protein Co-expression in Escherichia coli

The Multifaceted Benefits of Protein Co-expression in Escherichia coli

Published on: February 5, 2015

Area of Science:

Nutrition Science
Biochemistry

Background:

Egg protein is a complete protein source with high net protein utilization.
Research on the specific health benefits of egg protein, particularly egg whites, is less extensive than for other protein sources.

Purpose of the Study:

To review and summarize the health benefits of egg proteins based on human studies.
To explore the potential of egg white protein hydrolysates and fermented egg whites for health applications.

Main Methods:

Literature review of human studies on egg protein consumption.
Analysis of studies investigating egg white protein's effects on muscle mass, strength, cholesterol, and visceral fat.
Examination of research on protein hydrolysates from egg yolk and eggshell membrane.

Main Results:

Egg white protein consumption is associated with increased muscle mass and strength, cholesterol reduction, and visceral fat decrease.
Novel preparations like egg white hydrolysates and lactic-fermented egg whites show promise for enhanced health functions.
Preliminary animal studies suggest benefits from egg yolk and eggshell membrane protein hydrolysates for bone growth and joint pain, respectively.

Conclusions:

Egg protein, especially egg white, demonstrates diverse health benefits relevant to physical function and metabolic health.
Further investigation into processed egg components like hydrolysates and fermented forms could unlock new therapeutic applications.
Dietary egg protein may play a role in preventing physical frailty and metabolic syndromes.