Tag: Fingernails

Approximately 20-30% of the population bites their nails, leading many to wonder: can humans digest fingernails? The short answer is no, because fingernails are made of a tough, fibrous protein called keratin that the human digestive system is not equipped to break down.

A 1993 study showed that 63% of participants with brittle fingernails who took a daily biotin supplement saw improvement in symptoms. While many factors influence nail health, a targeted approach to nutrition is key. This guide examines **what is the best vitamin to strengthen fingernails** and explores the roles of other essential nutrients in promoting nail health.

According to the National Institutes of Health, B12 deficiency is a common health concern, especially among older adults and vegans. Understanding if and how **is vitamin B12 good for your fingernails** is key to a holistic approach to nail care and overall wellness.

Globally, iron deficiency is one of the most common nutritional deficiencies, and it can significantly impact nail health. So, what do iron deficiency fingernails look like? The visual signs can range from brittleness and pale color to the distinctive concave, or spoon-shaped, nails.

Approximately 30% of the population bites their nails, leading some to wonder if they provide any nutritional value. The short answer to the question, 'do nails have calories?', is no: despite being a type of protein, they are indigestible to humans and provide no usable energy for your body.