Growing longer natural nails takes time, with fingernails typically extending by about three millimeters each month. Although supplements and beauty products are widely marketed as ways to speed up nail growth, research suggests that maintaining a balanced diet and protecting nails from damage are more realistic ways to achieve stronger, longer nails.
The rate of growth varies depending on factors such as age, genetics, and general health. A study published in the Journal of the European Academy of Dermatology and Venereology recorded an average fingernail growth rate of 3.47 millimeters per month, compared with 1.62 millimeters for toenails.
What Research Says About Biotin and Nail Growth
Biotin, also known as vitamin B7, is a popular supplement ingredient marketed for hair, skin, and nail health.
The US National Institutes of Health (NIH) says there is insufficient scientific evidence to support many claims made about biotin supplements and beauty benefits.
Studies have reported improved nail thickness in people with brittle nails who took biotin.
However, the findings do not establish that the supplement accelerates nail growth in the general population.
High doses of biotin can also interfere with laboratory tests, including some thyroid and heart-related tests.
“Dietary supplements that contain biotin are often promoted to improve the health of your hair, skin, and nails, but there is little scientific evidence to support these claims. In a few small studies, some people with thin and brittle nails who took high doses of biotin had harder nails,” the NIH Office of Dietary Supplements states in its biotin fact sheet.
People considering supplements should consult a healthcare professional, particularly if they are due for blood tests.
Foods That Provide Nutrients for Healthy Nails
Nails are made primarily of keratin, a protein. Adequate protein intake and a varied diet provide nutrients needed for normal nail development and general health.
Iron and zinc are among the minerals linked to nail health, while vitamins support normal body functions.
A deficiency in certain nutrients can sometimes be linked to nail abnormalities.
| Nutrient | Food sources |
| Iron | Beans, meat, fish, spinach and sukuma wiki |
| Zinc | Meat, beans, nuts and seeds |
| Vitamin C | Oranges, guavas, tomatoes and lemons |
| Vitamin B12 | Fish, meat, eggs, milk and dairy products |
| Vitamin D | Fatty fish, egg yolks and fortified foods |
Dermatologists Warn Against Everyday Nail Damage
Repeated exposure to water, detergents and cleaning chemicals can weaken the nail plate, increasing the likelihood of splitting and breakage.
The American Academy of Dermatology (AAD) recommends wearing gloves when carrying out household cleaning and washing dishes.
It also advises moisturizing nails and cuticles as part of regular care.
The AAD also recommends keeping nails clean and dry, trimming them carefully and avoiding nail biting.
According to the organization, the measures help reduce damage that can prevent people from retaining nail length.
Artificial Nail Treatments and Natural Nail Tips
According to nail experts, frequent use of gel polish, acrylic extensions, and other artificial enhancements can damage natural nails, particularly when products are removed incorrectly.
Peeling off gel polish or acrylic material can strip away layers of the natural nail.
Aggressive filing and cuticle cutting can also weaken nails. The AAD recommends moisturizing nails after polish removal.
“Nails need to be moisturized, especially after removing nail polish, so be sure to apply a cream regularly,” Board-certified dermatologist Phoebe Rich, MD, FA, advised on choosing quality nail tips and routines.
People experiencing thinning or splitting after artificial nail treatments may want to take a break from enhancements while their natural nails recover.
Common Nail Tips Claims for Faster Nail Growth
Several popular nail tips and growth remedies have little scientific support, including claims that cutting nails more frequently makes them grow faster. Nail experts clarify that it only removes the free edge.
Similarly, applying oils or petroleum jelly can help with dryness but hasn’t been shown to substantially increase the natural growth rate.
Gel polish does not stimulate nail growth, and no reliable evidence shows that toothpaste or gelatin makes nails grow faster.
According to experts, nail-care products may help protect the nail, but they cannot guarantee faster growth.
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