Nails grow an average of 3 to 4 mm per month—a rate that varies depending on genetics, diet, age, and the season (they grow faster in summer). If you want to accelerate their growth or simply keep them strong and beautiful, several natural approaches have proven effective. Here's a complete guide.
Why do nails grow slowly or break?
Like hair, nails are composed of more than 90% keratin, a protein whose synthesis depends directly on nutrient intake. Deficiencies in biotin (vitamin B8), zinc, iron, or protein quickly manifest as fragile, brittle, ridged nails or slowed growth. Repeated exposure to harsh products (detergents, acetone-based nail polish removers, prolonged hot water), chronic stress, and winter cold also weaken the nail plate. To understand what the condition of your nails reveals about your health, our article "What Our Nails Reveal About Our Health" provides a comprehensive overview.
Natural treatments to stimulate nail growth
Vegetable oils
Vegetable oils rich in fatty acids nourish and strengthen nail keratin while moisturizing the cuticles and surrounding skin. Castor oil is the gold standard for growth: its ricinoleic acid content stimulates microcirculation in the nail bed and promotes growth. Argan oil adds shine and strength. Sweet almond oil and olive oil , rich in vitamin E and omega-9 fatty acids, deeply nourish the nail plate.
Apply a few drops to each nail and massage gently for 2 to 3 minutes to stimulate circulation. This daily ritual before bed is one of the most effective ways to accelerate growth and reduce breakage. To discover the best plant oils and their specific properties, our article on the best plant oils presents complete profiles of their effects.
Home care
Several natural remedies can stimulate nail growth. Lemon juice , applied to the nails for 10 minutes, lightens and strengthens them, and stimulates growth thanks to its vitamin C content . Crushed garlic , rich in selenium, strengthens keratin and hardens soft nails—rub a cut clove directly onto the nails for a few minutes. Pure aloe vera moisturizes cuticles and soothes minor inflammation around the nails.
Cuticle care
Overgrown cuticles can slow growth by creating a mechanical barrier. Soak your hands in warm water for 5 minutes to soften them, then gently push them back with an orange stick or cuticle pusher—never use shears, which can cause micro-cuts. Moisturize afterward with a plant-based oil. This step, done once a week, keeps the cuticles clean and promotes growth.
Protecting your nails on a daily basis
Always wear gloves for housework, washing dishes, or gardening. Detergents, prolonged hot water, and soil dehydrate and weaken the nail plate. A protective base coat before applying any nail polish protects the nail from the coloring pigments. Use an acetone-free nail polish remover, which is much less harsh on keratin.
Nutrition: the cornerstone of beautiful nails
Beautiful nails are built from within. The essential nutrients for their growth and strength are:
Biotin (vitamin B8) is the key vitamin for nails: it stimulates keratin production and improves nail plate thickness. Studies have shown that biotin supplementation significantly reduces nail brittleness. Food sources: brewer's yeast, egg yolk, almonds, avocado.
Zinc plays a direct role in keratin synthesis and cell renewal. A zinc deficiency often manifests as white spots on the nails and stunted growth. Sources include oysters, pumpkin seeds, wheat germ, and lean meats. To learn more about zinc's role in health, see our article on the health benefits of zinc .
Vitamin E protects the nail plate from free radicals and improves microcirculation in the nail bed. Sources: almonds, sunflower seeds, wheat germ oil. Iron , by improving oxygenation of nail cells, prevents spoon-shaped nails (koilonychia) linked to iron deficiency. Proteins (sulfur-containing amino acids) are the building blocks of keratin: meats, fish, legumes, eggs.
Drinking 1.5 to 2 liters of water per day is also essential: dehydrated nails become brittle and ridged.
Nail supplements
When diet alone isn't enough to address deficiencies, targeted supplements provide helpful support. The most effective formulas combine high doses of biotin (B8), zinc, selenium (a protective antioxidant), vitamins B6, B9, B12, and vitamin E. Gummies offer a convenient and well-dosed form, requiring a minimum 3-month course to see visible results—since nail growth is slow, effects aren't noticeable for 6 to 8 weeks. These supplements are particularly useful in cases of identified deficiencies or during periods of intense stress that accelerate nutrient consumption.
To learn more about caring for damaged nails, our article "How to treat damaged nails" offers solutions tailored to each problem.
Frequently asked questions about nail growth
How fast do nails grow?
Nails grow on average 3 to 4 mm per month, or about 0.1 mm per day. The rate varies depending on the individual, the season (faster in summer), age (slower after 40), dominant hand (nails grow slightly faster on the dominant hand), and nutritional status. In cases of deficiencies, growth can slow to less than 2 mm per month.
Does biotin really make nails grow faster?
Yes, but primarily in cases of deficiency. Several clinical studies have shown that biotin supplementation improves the thickness and strength of brittle nails and reduces their breakage rate. The effect on growth rate is more modest. If your nails are naturally strong and your diet is balanced, additional biotin will have little further effect.
Why do my nails keep breaking despite taking care of them?
If your nails break despite a good care routine, the cause is often nutritional (iron, zinc, or biotin deficiency) or related to excessive exposure to water and chemicals. A blood test can identify deficiencies. In some cases, conditions such as hypothyroidism or a dermatological problem can affect the nails—consult a doctor if the problem persists.