Ava Monroe
Healthy nails are a sign of overall health, and diet plays a key role in their strength and appearance. Nails are made of a fibrous structural protein called keratin, which is produced in the body with the help of vitamins, minerals, and amino acids. A deficiency in these nutrients can lead to weak and brittle nails. While protein is essential for nail health, simply consuming more protein may not be the answer. Instead, a well-rounded diet rich in vitamins, minerals, and amino acids can help support nail health and ensure your body has the building blocks it needs to produce keratin and keep your nails strong.
| Characteristics | Values |
|---|---|
| What are nails made of? | A fibrous structural protein called keratin. |
| What does protein do for nails? | It helps in boosting [keratin] production, creating strong nails. |
| What happens when you don't eat enough protein? | Low protein intake may cause weaker nails. |
| What foods contain protein? | Animal and plant foods, including meat, dairy, eggs, nuts, [beans], and [grains]. |
| What is the recommended daily protein intake? | The RDA for protein is [0.36 grams per pound] (lb) or [0.8 grams per kilogram] (kg) of body weight per day. |
| What other nutrients are important for nail health? | Vitamin C, biotin, iron, and magnesium. |
| What happens if I don't get enough Vitamin C? | Poor [collagen] structure formation, leading to brittle nails. |
| What happens if I have an iron deficiency? | Vertical ridges in your nails, or your nails may be [concave] or ["spooned."] |
| Are there any other recommendations for nail health? | Consume more [vegetables] and [trace minerals]. |
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What You'll Learn
Keratin is the protein that makes up nails
Keratin is a protein that your body naturally produces. It is a structural fibrous protein, also known as scleroprotein. Keratin is the key structural material that makes up nails, hair, skin, feathers, horns, claws, hooves, and the outer layer of skin in tetrapod vertebrates. It is present in epithelial cells and provides support and protection.
Keratin is strong and insoluble in diluted acids, alkalines, solvents, and water. This strength and insolubility make it ideal for providing structure and protection to nails, hair, and skin. The keratin you see in nails is actually dead, and it is formed by dead cells that your body sheds as new cells push up from underneath.
Eating enough protein is essential for boosting keratin production and creating strong nails. A low protein intake may lead to weaker nails. Protein is found in a variety of animal and plant-based sources, and it is a building block for healthy skin, hair, and nails.
In addition to protein, other nutrients are important for nail health. These include biotin, a B-complex vitamin that promotes healthy cell growth and aids in the metabolism of protein-building amino acids. Iron is also crucial, as it helps carry oxygen to your nails and other cells in the body. A deficiency in iron can lead to vertical ridges, concavity, or "spooning" of the nails.
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Vitamin C is essential for nail health
While protein is essential for nail health, it is not the only nutrient that matters. Vitamin C is another key nutrient that plays a crucial role in maintaining strong and healthy nails. Vitamin C is an essential nutrient that the body cannot produce on its own. Nails are made of a fibrous structural protein called keratin, and vitamin C is necessary for boosting keratin production. This is because vitamin C is required for the body to produce collagen, which provides the structural element to our nails.
Vitamin C helps turn the amino acid proline into hydroxyproline, which is essential for stabilising the collagen structure. Without adequate amounts of vitamin C, the body cannot store or form collagen effectively, leading to poor collagen structure formation. This, in turn, results in brittle nails and poor nail health. Therefore, ensuring sufficient intake of vitamin C is vital for maintaining nail health and promoting strong nail growth.
Vitamin C can be found in various foods, including citrus fruits, bell peppers, green vegetables, and tomatoes. By incorporating these foods into one's diet, individuals can support their nail health and overall well-being. In addition to vitamin C, other nutrients such as zinc, iron, and B vitamins also play a role in maintaining healthy nails.
While the focus is on vitamin C, it is important to understand that a combination of nutrients is necessary for optimal nail health. A well-rounded diet that includes a variety of vitamins, minerals, and nutrients is the best approach to achieving and maintaining strong, healthy nails. Proper nail care practices also contribute to overall nail health and should not be overlooked.
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Iron deficiency can cause nail ridges and concavity
While protein is essential for nail health, iron deficiency is also a common cause of nail ridges and concavity. Iron is a crucial component of red blood cells, responsible for carrying oxygen to all cells in the body, including the nails. When the body does not receive sufficient iron, oxygen delivery to the cells is compromised, leading to potential nail issues.
Iron deficiency can manifest in nails as vertical ridges or koilonychia, commonly known as spoon nails. Spoon nails exhibit a scooped-out appearance, with a noticeable depression in the center, capable of holding a drop of water. This condition indicates that the nails are not receiving the oxygen they need due to inadequate iron levels in the body.
The recommended daily allowance (RDA) for iron varies based on age, sex, and hormonal fluctuations. To boost iron absorption, it is advisable to pair iron-rich plant foods, such as dark green leafy vegetables, peanuts, seeds, and beans, with vitamin C-rich foods like oranges and strawberries. Animal sources of iron, including beef, chicken, fish, and eggs, are also readily absorbed by the body.
Treating iron deficiency involves addressing the underlying cause and ensuring adequate iron intake. With time, new, smoother nails may grow in, replacing the ridged or concave nails associated with iron deficiency. Consulting a healthcare provider is essential to determine the specific cause of nail ridges and concavity and to receive guidance on iron supplementation if necessary.
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Biotin supplements may help strengthen nails
While consuming a variety of vitamins, minerals, and nutrients through food contributes to growing and maintaining healthy nails, biotin supplements may help strengthen nails. Biotin is a B-complex vitamin also known as vitamin B7, coenzyme R, or vitamin H. It promotes healthy cell growth and aids in the metabolism of protein-building amino acids that are essential for nail growth. Nails are made of a fibrous structural protein called keratin, which gives nails their strength and resilience.
A few small studies support the use of biotin supplements for strengthening nails. For example, a recent study from Switzerland demonstrated a 25% increase in nail plate thickness in patients with brittle nails who received biotin supplementation. Another study from 1993 examined 35 people with brittle fingernails and found that 2.5 mg of biotin per day for six weeks to seven months improved symptoms in 63% of participants.
However, it is important to note that biotin deficiency is rare, and having brittle nails does not necessarily mean a person is deficient in biotin. In fact, most individuals get plenty of this vitamin in their diet. While the Recommended Dietary Allowance (RDA) for biotin has not been established, the Adequate Intake (AI) recommendation for adults has been set at 30 micrograms (mcg) per day for optimal nail, hair, and general health.
In addition to biotin, other nutrients that contribute to nail health include vitamin C, iron, vitamin B12, folate, and magnesium. Vitamin C is important for collagen synthesis, which provides structure to nails. Iron and vitamin B12 are necessary for keeping nails strong and healthy, with deficiencies leading to potential changes in nail colour and texture. Folate contributes to nail growth and health by aiding in the development of new cells, and magnesium is involved in protein synthesis, which is required for nail growth.
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A balanced diet may negate the need for protein supplements
A balanced diet that includes whole foods can provide all the protein your body needs, making supplements unnecessary. Nails are made of a fibrous structural protein called keratin, which is produced in the body through a combination of vitamin C, silica, zinc, copper, and protein. A deficiency in any of these nutrients can lead to weaker nails.
Protein is indeed essential for boosting keratin production and creating strong nails. However, it is important to note that protein is just one of several nutrients that play a role in nail health. Vitamin C, for example, is crucial for collagen synthesis, and a deficiency can lead to poor collagen structure and brittle nails. Other vitamins and minerals, such as biotin, iron, and magnesium, also contribute to nail health.
A well-rounded diet that includes a variety of whole foods can provide sufficient amounts of protein and these other essential nutrients. Animal-based proteins, such as beef, poultry, eggs, and dairy, are common sources of complete proteins, which contain all the essential amino acids your body needs. However, plant-based sources, such as beans, grains, and soy, can also provide complete proteins when combined properly.
While protein supplements can be a convenient way to increase protein intake, they are not always necessary and may even have negative effects. Research has shown a link between dairy-based supplements and acne, for instance. Instead of relying on supplements, individuals can meet their protein needs by consuming a variety of whole foods and including protein in every meal and snack.
It is worth noting that individual protein needs may vary based on factors such as gender, age, activity levels, and overall health. For most people, a balanced diet that includes a range of protein sources will provide adequate amounts of this nutrient. However, those with specific concerns or conditions may benefit from consulting a clinical nutrition specialist or primary care physician for personalized advice.
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Frequently asked questions
Yes, protein is one of the foundational elements in collagen synthesis, which is the building block of fingernails. Nails are made of the protein keratin, so eating enough protein is essential for boosting keratin production and creating strong nails.
Meat, eggs, quinoa, and nuts are all great sources of protein for nail health. For vegans, hemp seed protein is a good option, as it is rich in protein and iron.
Plant-based sources of protein such as beans, lentils, and nutritional yeast are great for nail health. Nutritional yeast is also high in B vitamins, which are important for nail strength.
Iron, calcium, magnesium, zinc, vitamin C, and vitamin D are all important for nail health. Vitamin C is especially important because it is needed for collagen synthesis.
Brittle nails or nails that show horizontal ridges can be a sign of insufficient protein intake. Nails that take longer than half a second to refill after being pressed on may also indicate dehydration, which can affect nail health.
