Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Keratin is scientifically validated as a key structural protein that supports the health and integrity of the nail body system. Nails are primarily composed of keratin, a fibrous protein that provides strength, rigidity, and resilience. The role of keratin in nail physiology is well-characterized: keratinocytes in the nail matrix synthesize keratin, which is then packed into tough, compact structures forming the nail plate. Scientific studies have demonstrated that deficiencies or mutations in keratin genes can lead to nail disorders, such as brittle nails (onychoschizia) and other dystrophies, underscoring its essential role. Additionally, some clinical research has investigated oral and topical keratin supplements or keratin-derived peptides for improving nail strength and appearance, though the efficacy of supplementation (as opposed to endogenous production) is less robustly supported. Nonetheless, the foundational importance of keratin to nail structure is undisputed in dermatological and anatomical literature. Thus, the use of keratin to support the nail body system is based on direct and substantive scientific evidence regarding its structural function and necessity for healthy nail formation and maintenance.

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Other ingredients that support Nails

Other body systems supported by keratin

Products containing keratin

Nature's Sunshine Power Greens Pouch