Sophia Delgado
Human nails are made of a substance called keratin and grow at different rates depending on a variety of factors. These include age, sex, season, exercise level, diet, hereditary factors, and overall health. For example, the nails on the dominant hand tend to grow faster, as do the nails on longer fingers. Additionally, nail growth is faster during the day and in the summer. While there are no scientifically proven methods to accelerate nail growth, maintaining good nail hygiene and caring for your nails can promote nail health and, consequently, growth.
| Characteristics | Values |
|---|---|
| Average growth rate of fingernails | 3.47 mm per month |
| Average growth rate of toenails | 3.47 mm per month |
| Fingernail with the slowest growth rate | Little fingernail |
| Toenail with the fastest growth rate | Great toenail |
| Factors influencing growth rate | Age, sex, season, exercise level, diet, hereditary factors, overall health, and habits |
| Factors that may lead to faster nail growth | Trauma to the nail, nail biting, and frequent nail clipping |
| Ways to improve nail health | Taking biotin, using nail hardeners, avoiding glue-on nails and toxic polishes, and maintaining good nail hygiene |
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What You'll Learn
Nail growth and overall health
Nail growth is influenced by a person's overall health, age, sex, hormones, season, exercise level, diet, hereditary factors, and habits. Good nail hygiene and care can promote nail growth and overall health. Keeping nails clean is essential for maintaining nail health. This includes trimming nails regularly, about once a week, and keeping cuticles pushed back or trimmed. Cuticles protect the nail root, so it is important not to cut them, as this can lead to infection. Applying cuticle oil daily can help keep cuticles moisturized and prevent dead skin from growing on the nails.
Additionally, cutting nails straight across with slightly rounded edges can help ensure healthy nails. A nail file can also be used to manage the length and avoid snags or tears. Keeping toenails short can help minimize the risk of injury and trauma. The nails on the dominant hand tend to grow faster, possibly due to more frequent use, which also increases the risk of trauma. Nail growth may also be faster during the day and in the summer.
Certain habits can impact nail growth. For example, onychophagia, or chronic nail-biting, has been associated with faster nail growth due to the trauma caused, stimulating circulation in the nail bed. Regular nail clipping is a safer alternative to achieve faster nail growth. Puberty is also a time when nail growth is affected due to fluctuating hormone levels. During pregnancy, hormone changes can cause nail growth to speed up.
To promote nail growth and overall health, it is recommended to take biotin supplements, as they have been found to reduce breakage and improve nail health. Nail hardeners can also be used sparingly to strengthen nails, but prolonged use may break down the nail over time. It is advisable to avoid strengtheners containing formaldehyde or formalin. Instead of glue-on nails and toxic polishes, opting for non-toxic or water-based polishes can reduce the risk of breakage.
Overall, while some factors influencing nail growth are beyond individual control, maintaining good nail hygiene and care can promote nail growth and overall nail health.
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Factors influencing nail growth
Several factors influence the rate of nail growth, which is about a tenth of a millimetre per day or 3.47 millimetres per month on average.
Age
Nail growth slows down as people age. Researchers estimate that by age 20, the growth rate of nails may slow by as much as 0.5% per year. This is because health conditions impacting nail growth are more common in older people. For example, fungal infections of the nail, known as onychomycosis, represent about half of all nail disorders and are more common in older people.
Gender
According to a study, younger age and male gender are associated with faster nail growth rates.
Finger
The rate of nail growth also depends on which finger the nail is on. The little finger's nail grows slower than other fingernails. Nails on the dominant hand tend to grow faster than the non-dominant hand. This is because the dominant hand is used more often and is more prone to injuries or trauma, which could lead to quicker nail growth as the body sends blood and nutrients to the area to support healing. Nails on longer fingers also tend to grow faster.
Season
Fingernails grow faster during the summer.
Hormones
Hormone levels affect nail growth. For example, nail growth speeds up during pregnancy but slows down during lactation. Outside of pregnancy, puberty is usually when hormone levels are most tumultuous, and nail growth is said to peak during this time.
Habits
Certain habits can affect nail growth. Onychophagia, or chronic nail-biting, has been associated with a faster nail growth rate. This may be because biting stimulates circulation in the nail bed. Similarly, frequent nail clipping may also make nails grow faster.
Health
Overall health, including nutritional deficiencies, can influence nail growth. Certain health conditions, such as peripheral artery disease, eczema, psoriasis, and subungual melanoma, can affect the nail matrix and slow nail growth. Serious illnesses like a heart attack, COVID-19, or pneumonia can interrupt nail growth and cause Beau's lines (horizontal ridges in the nails). Injuries to the nail matrix can also slow nail growth and cause nail infections. Chemotherapy and other medications can also affect nail growth and cause Beau's lines or nail colour changes.
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Nail growth and nutrition
The growth of your nails is influenced by several factors, including age, hormones, and habits. As you get older, your nail growth may slow down. For instance, researchers estimate that by age 20, the growth rate of your nails may slow by as much as 0.5% per year. The hormone changes a person experiences during pregnancy cause their nails to grow faster. Additionally, nail growth is faster during puberty and declines as hormone levels balance out with age.
Onychophagia, or nail-biting, is associated with a faster nail growth rate. This may be because biting causes trauma to the nail, stimulating circulation in the nail bed. Similarly, frequent nail clipping may also make your nails grow faster.
Good nail hygiene is essential for nail health. Keeping your nails clean, regularly trimmed, and moisturized can help promote nail growth.
Nutrition also plays a crucial role in nail health and growth. Here are some key vitamins and nutrients that can help:
- Biotin: A rare deficiency, but consuming biotin through supplements or food may help strengthen nails and improve growth.
- Vitamin B12 and Folate (Vitamin B9): These vitamins are necessary for red blood cell formation and new cell development. Deficiencies can cause pigment changes and make nails brittle.
- Magnesium: Involved in protein synthesis, which is required for nail growth. Vertical ridges in nails may indicate a magnesium deficiency. Whole grains, dark green leafy vegetables, quinoa, almonds, cashews, peanuts, edamame, and black beans are good sources.
- Vitamin C: Essential for collagen production, which provides strength and structure to nails. Found in citrus fruits, strawberries, bell peppers, and broccoli.
- Zinc: Required for the growth and division of nail cells. Inadequate intake can cause white spots on nails and slow growth. Animal proteins like beef, poultry, fish, and eggs are rich sources, but certain plant foods like soy, chickpeas, black beans, nuts, and seeds also contain zinc.
- Omega-3 Fatty Acids: Help keep nails moisturized and prevent dryness and brittleness. Found in fatty fish like salmon, mackerel, and sardines, as well as plant sources like chia seeds, flax seeds, and walnuts.
- Vitamin E: A powerful antioxidant that protects nails from damage and improves blood circulation. Found in almonds, sunflower seeds, spinach, and avocados.
- Iron: Crucial for producing hemoglobin, which delivers oxygen to nail cells. Low iron levels can lead to brittle, ridged, or spoon-shaped nails. Red meat, poultry, fish, lentils, beans, and fortified cereals are good sources.
In addition to incorporating these nutrients into your diet, staying hydrated by drinking enough water and limiting sugary and processed foods can also promote nail health.
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Nail growth and age
The growth rate of human nails varies depending on several factors, including age, gender, and personal habits. On average, fingernails grow at a rate of about 3.47 mm per month or about 0.1 mm per day. Toenails, on the other hand, grow at a slower rate of approximately 1.62 mm per month.
Age plays a significant role in nail growth. As people grow older, their nail growth tends to slow down. Research suggests that starting as early as age 20 or 25, the growth rate of nails may decrease by approximately 0.5% per year. This slowdown in nail growth with age may be attributed to several factors. One factor is the decrease in blood circulation that occurs as people age, resulting in reduced nutrient delivery to the nails. Additionally, older adults are more prone to health conditions that can impact nail growth, such as fungal infections (onychomycosis), which are common in older individuals.
Hormonal changes associated with aging can also influence nail growth. During pregnancy, for instance, hormone fluctuations can lead to accelerated nail growth, while the post-pregnancy period may be marked by a decrease in nail growth rates. Puberty is another period of hormonal fluctuations that can affect nail growth, with nail growth rates peaking during this time and then declining as hormone levels stabilize with age.
Additionally, age-related changes in the morphology of the nail plate have been observed. These changes include alterations in thickness, contour, surface, and colour. The curve of the nails may also change over time, and ingrown toenails can become more common in older adults, causing substantial pain and walking difficulties.
While there are no scientifically proven methods to accelerate nail growth, maintaining overall nail health can help strengthen nails and prevent breakage. This includes practices such as taking biotin supplements, using nail hardeners sparingly, avoiding glue-on nails and toxic polishes, and prioritising nail hygiene through regular cleaning, trimming, and moisturising.
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Nail growth and hormones
Nail growth is influenced by a variety of factors, including age, hormones, and habits. While there are no scientifically proven methods to increase nail growth, maintaining healthy nails can help prevent breakage and allow them to grow longer. This includes practices such as regular grooming, keeping nails clean, and pushing back or trimming cuticles.
Hormones play a significant role in nail growth and overall nail health. During pregnancy, for example, hormonal changes can cause nails to grow faster. This is because hormone levels, particularly oestrogen and progesterone, climb to the highest levels of a woman's lifetime during this time. Oestrogen, in particular, helps keep water in body tissues, including the nails, so lower oestrogen levels can contribute to dry, brittle, and dull nails.
Additionally, thyroid function is important for nail health. Thyroid problems can cause changes in the body's hormones, which can eventually show up on the nails. For example, hypothyroidism can lead to impaired circulation to the extremities, resulting in dry, brittle nails. Parathyroid hormone deficiency can also cause similar issues, as these glands regulate calcium and vitamin D, which are important for nail health.
Hormone-related illnesses, such as cancer and chemotherapy, can also affect nail growth and health. The stress hormone cortisol, for instance, can be measured in the nails and may provide insights into an individual's long-term hormone status. Vertical lines on fingernails have also been associated with growth hormone deficiency and nutrient deficiency.
In summary, hormones have a significant impact on nail growth and overall nail health. While some hormone-related changes are expected, such as increased nail growth during pregnancy, other hormone imbalances or illnesses can lead to nail issues. Maintaining overall health and hormone balance is crucial for promoting healthy nail growth.
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Frequently asked questions
On average, fingernails grow around 3 millimetres per month. However, the actual growth rate depends on factors like age, sex, season, exercise level, diet, and hereditary factors.
Nail growth is influenced by overall health, age, hormones, and habits. For example, during pregnancy, nail growth speeds up due to hormone changes. Additionally, the nails on the dominant hand tend to grow faster, possibly due to more frequent use and trauma.
While there is no proven method to accelerate nail growth, maintaining nail health and hygiene can help. This includes keeping nails clean, trimmed, and moisturized, as well as addressing any nutritional deficiencies or underlying health conditions that may impact nail growth.
