Evidence supporting the use of: Spinach
For the body system: Nails

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Synopsis

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

Synopsis: Spinach is often recommended for nail health due to its rich nutrient profile, particularly its content of iron, folate, vitamin A, vitamin C, and biotin. Scientific understanding of nail growth and strength shows that deficiencies in certain nutrients—such as iron (which can lead to brittle or spoon-shaped nails), folate, and biotin—are associated with poor nail health. Spinach provides a significant amount of these nutrients, especially non-heme iron and folate, which are necessary for healthy blood and tissue growth, including nails. However, while there is scientific rationale for the nutrients found in spinach contributing to healthy nails, there is limited direct clinical evidence specifically studying spinach itself for nail health. Most evidence comes from observational data about nutrient deficiencies and nail problems, rather than interventional studies demonstrating that spinach consumption alone improves nail strength or growth. Therefore, spinach can be considered a scientifically supported food for nail health based on its nutritional content, but the evidence is indirect and not specific to spinach supplementation or use.

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