Liam Carter
Human nails are made of a protein called keratin, which is also responsible for the creation of hair and the outer layer of skin. On average, fingernails grow at a rate of about 3.47mm per month, or about a tenth of a millimetre per day. This rate varies depending on factors such as age, hand dominance, finger length, season, and overall health. Toenails, on the other hand, grow much slower, at an average rate of 1.62mm per month. While there is no magic solution to speed up nail growth, maintaining strong and healthy nails through proper nail care can help encourage growth.
| Characteristics | Values |
|---|---|
| Average growth of fingernails per day | one-tenth of a millimeter |
| Average growth of fingernails per month | 2.5-3.47 millimeters |
| Average growth of fingernails per year | 30-41.64 millimeters |
| Average growth of toenails per month | 1 millimeter |
| Average growth of toenails per year | 12 millimeters |
| Factors affecting nail growth | age, dominant hand, finger, season, overall health, hormones, and circulation |
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What You'll Learn
Factors affecting nail growth
On average, fingernails grow about a tenth of a millimeter per day, translating to approximately 3.47 millimetres per month. However, this rate of growth can vary depending on several factors.
Age: Nail growth tends to decrease with age. A 2007 study observed that the thumbnail of a 23-year-old grew at a rate of 0.123 mm per day, while at 67 years of age, the rate had dropped to 0.095 mm per day. This change may be attributed to the slowing of blood circulation with advancing age.
Gender: Men's nails tend to grow faster than women's.
Hormone Levels: Hormonal changes, such as during pregnancy, can influence nail growth rates. Pregnancy is associated with increased nail growth, while lactation may lead to a decrease in growth rate. Puberty is another period of hormonal fluctuations that can affect nail growth, with rates typically peaking during this stage.
Seasonal Variations: Nails tend to grow faster during the summer months compared to winter.
Hand and Finger: The nails on your dominant hand and longer fingers grow faster. Additionally, a 2007 study found that the little finger's nail grows slower than other fingernails.
Time of Day: Your fingernails grow faster during the day.
Health and Medical Conditions: Overall health plays a role in nail growth. Certain illnesses, such as a heart attack, COVID-19, or pneumonia, can interrupt nail growth and cause horizontal ridges known as Beau's lines. Peripheral artery disease (PAD), which reduces blood flow to the legs and feet, can also slow nail growth due to decreased circulation. Skin conditions like severe eczema and psoriasis can temporarily hinder nail growth and cause nail discolouration and texture changes.
Medication: Chemotherapy and other medications can impact the nail matrix, leading to Beau's lines, slow nail growth, white bands (Mees' lines), and nail colour changes.
Nutrition and Diet: A healthy diet can promote faster and stronger nail growth. Nutritional deficiencies may result in slower nail growth, and addressing these deficiencies can help restore normal growth rates.
Injury: Injuries to the nail matrix, such as pinching or crushing your finger, can cause bruising, ridges, discolouration, and even nail loss.
Circulation: Poor circulation will slow nail growth as the nail won't receive adequate nutrients and oxygen.
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Toenail vs. Fingernail growth
The average human fingernail grows at a rate of about 3.47 millimetres a month, or about a tenth of a millimetre per day. This rate of growth varies depending on the finger in question, with the little finger's nail growing slower than the others. Conversely, the thumb's nail tends to grow the fastest. Nails also grow faster on your dominant hand, during the day, and in the summer.
On average, it takes about six months for a fingernail to grow out completely. However, this timeline can be affected by various factors, including age, hormones, and overall health. For example, nail growth tends to decrease with age, as blood circulation slows down. Hormonal fluctuations, such as those during puberty and pregnancy, can also impact nail growth rates. Additionally, certain medical conditions, nutritional deficiencies, and individual habits like nail-biting or clipping can influence how quickly your nails grow.
In contrast to fingernails, toenails grow at a much slower rate, typically averaging 1.62 millimetres per month. This is about one-third to half the rate of fingernail growth, resulting in a complete regrowth time of 12 to 18 months. The slower growth of toenails may be attributed to the reduced trauma they experience compared to fingernails.
While the exact reasons for the difference in growth rates between toenails and fingernails remain unknown, it is believed that the variation may be linked to the amount of circulation in the nail bed. Toenails, being further away from the heart and generally less exposed to trauma, may receive less blood flow, contributing to their slower growth.
Although there are no scientifically proven methods to accelerate nail growth, maintaining overall health and practising good nail hygiene can positively influence nail growth and strength. This includes eating a nutritious and well-balanced diet, keeping nails clean and dry, trimming them regularly, and avoiding harmful habits such as nail-biting.
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Nail growth and health
On average, fingernails grow about a tenth of a millimetre per day, translating to approximately 3.47 millimetres per month or one-tenth of an inch per month. The rate of growth depends on several factors, including age, hormone levels, and overall health. For instance, nail growth tends to decrease with age, and the nails on the dominant hand tend to grow faster. Toenails, on the other hand, grow much slower than fingernails, at an average rate of 1.62 millimetres per month.
Nail health is closely associated with overall health and nutritional intake. Healthy nails are typically smooth and free from discolouration. However, various nail abnormalities can occur, and while many are harmless, some may indicate underlying health issues. For example, white nails, known as leukonychia, could result from trauma, anaemia, dietary deficiencies, heart or kidney disease, or poisoning. One of the most common causes of yellow nails is a fungal infection, which can cause the nail bed to retract and the nails to thicken and crumble. Additionally, dry, brittle nails that frequently crack or split have been linked to thyroid disease.
Horizontal ridges on nails, also called Beau's lines, may indicate kidney disease or other underlying conditions. Vertical ridges, on the other hand, are generally not a cause for concern unless accompanied by colour changes. Repeated wetting and drying of fingernails can lead to brittle nails, a condition called onychoschizia, which may also be a sign of hypothyroidism or iron deficiency. Nail biting has been linked to anxiety and obsessive-compulsive disorder.
While nail changes can accompany various conditions, they are rarely the first sign. It is important to note that most nail issues can be resolved with home treatments or will resolve on their own. However, if you are concerned about the appearance of your nails or experience unusual symptoms, it is advisable to consult a healthcare professional.
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Record-breaking nail growth
Fingernails grow at an average rate of about a tenth of a millimetre per day, translating to approximately 3.47 millimetres per month. However, some individuals have taken nail growth to extraordinary lengths, achieving record-breaking nail growth that defies these average rates.
One notable example is Shridhar Chillal from India, who holds the Guinness World Record for the longest fingernails ever recorded on a single hand. Chillal stopped cutting his nails in 1952, and by 2014, his left hand's fingernails cumulatively measured an astonishing 30 feet (9.1 meters) in length. His thumbnail alone reached a remarkable length of 6.5 feet (2 meters). Chillal's achievement showcases the potential for extreme nail growth, far surpassing the average rates.
Another record-breaker is Christine "The Dutchess" Walton, who also chose to forgo nail trimming. From 1990 until 2013, Walton's fingernails on her left hand grew to a cumulative measurement of 23 feet, 11 inches (7.3 meters). This impressive length showcases her dedication to the pursuit of nail growth.
In recent years, Diana Armstrong, a 63-year-old grandmother from Minneapolis, has set a new benchmark for nail growth. Armstrong's fingernails measured a staggering 42 feet, 10 inches in length, earning her a place in the Guinness World Records. Armstrong's story highlights the emotional significance associated with her nail growth journey.
Ayanna Williams, an American, holds the world record for the longest fingernails on a single hand by a woman. Her nails measured 576.4 centimetres (181.09 inches) in 2018 and continued to grow, reaching 733.55 centimetres (240.7 inches) in 2021 before she decided to cut them. Williams' pursuit of extreme nail growth exemplifies the dedication and challenges faced by those striving for record-breaking nail lengths.
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Nail growth and nutrition
Human fingernails grow at an average rate of 3.47 mm per month or about 0.1 mm per day. Toenails, on the other hand, grow at a slower rate of 1.62 mm per month. The rate of nail growth depends on various factors, including age, finger, hand dominance, season, and overall health. For instance, nails tend to grow faster on the dominant hand and longer fingers. They also grow faster during the day and in the summer. Additionally, nail growth decreases with age due to slower blood circulation.
Nail growth and appearance can be influenced by nutritional factors. Here are some key nutrients that play a role in nail health:
Biotin is a B vitamin that helps strengthen brittle nails and promote their growth. It is involved in improving overall nail health. While biotin deficiency is rare, consuming it through foods or supplements may be beneficial.
Vitamin B12 and folate (Vitamin B9) are crucial for nail health. They contribute to red blood cell formation and new cell development. A deficiency in vitamin B12 can lead to unusual nail pigmentation, while a folate deficiency can cause pigment changes, nail rigidity, and brittleness.
Magnesium is essential for nail growth as it is involved in protein synthesis and the formation of new nails. Consuming adequate magnesium helps prevent vertical ridges in the nails. Whole grains, dark green leafy vegetables, quinoa, almonds, cashews, peanuts, edamame, and black beans are good sources of magnesium.
Vitamin C is vital for collagen production, which provides strength and structure to nails. It also enhances the absorption of iron from plant-based sources. Citrus fruits, strawberries, bell peppers, and broccoli are excellent sources of vitamin C.
Zinc plays a critical role in nail growth and repair. A deficiency in zinc can cause white spots on the nails and hinder their growth. Oysters, beef, pumpkin seeds, and chickpeas are rich sources of zinc.
Omega-3 fatty acids help maintain nail health by providing anti-inflammatory benefits and supporting healthy cell membranes. They prevent nail dryness and brittleness. Fatty fish like salmon, mackerel, and sardines are excellent sources, while plant-based options include chia seeds, flax seeds, and walnuts.
Vitamin E is an antioxidant that protects nails from damage caused by free radicals and improves blood circulation, thereby supporting nail growth. Almonds, sunflower seeds, spinach, and avocados are good sources of vitamin E.
Iron is crucial for the production of hemoglobin, which delivers oxygen to nail cells. Insufficient iron intake can lead to brittle, ridged, or spoon-shaped nails. Red meat, poultry, fish, lentils, beans, and fortified cereals are excellent sources of iron, and pairing them with vitamin C-rich foods enhances absorption.
While these nutrients are essential for nail health, it is also important to maintain overall hydration by drinking enough water and consuming hydrating foods. Dehydration can lead to dry, brittle nails that are more susceptible to breakage.
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Frequently asked questions
Human nails grow at an average rate of 3.47 millimeters (mm) per month, or about a tenth of a millimeter per day. This amounts to approximately 41.64 millimeters in a year.
The rate of nail growth depends on various factors, including age, hormone levels, overall health, and the time of year. For example, nail growth tends to be faster during the summer and slower during the winter.
No, fingernails grow much faster than toenails. Fingernails grow at an average rate of 3.47 mm per month, while toenails grow at an average rate of 1.62 mm per month.
While there is no proven method to significantly increase nail growth rate, maintaining strong and healthy nails can help. This includes practicing good nail hygiene, keeping nails moisturized, and ensuring proper nutrition.
It typically takes about six months for a lost fingernail to grow back completely. For toenails, the regrowth process can take up to a year and a half.
