Evidence supporting the use of: Animal protein
For the body system: Hair

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Animal protein is scientifically recognized as an important nutrient for supporting hair health. Hair is primarily composed of the protein keratin, and adequate protein intake is essential for hair growth and maintenance. Clinical studies have shown that protein deficiency can lead to hair thinning, hair loss, and reduced hair quality. Animal proteins, such as those found in meat, eggs, fish, and dairy, are considered "complete proteins" because they contain all essential amino acids required by the human body. These amino acids serve as building blocks for keratin and other structural components of hair. Several observational and interventional studies have associated higher dietary protein intake, particularly from animal sources, with improved hair growth and reduced incidence of hair shedding, especially in individuals who were previously protein-deficient. However, while protein adequacy is necessary for hair health, there is limited evidence that consuming protein beyond recommended amounts further enhances hair quality in individuals who already meet their protein needs. Most scientific support focuses on correcting deficiencies rather than promoting hair growth beyond normal rates. In summary, animal protein is scientifically validated as necessary for supporting the normal structure and function of hair, primarily by preventing deficiency-related hair problems.

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