Key takeaways
- The nail matrix produces new nail cells.
- Fingernails grow about 3 mm a month.
- Toenails take up to 18 months to replace.
- Growth slows with age.
- Circulation and nutrition feed the matrix.
Most people only notice their nails when something goes wrong. Understanding how nails grow explains why changes take time, and why nourishing them from within matters.
Nail anatomy
The nail matrix
Hidden under the skin at the base of the nail, the matrix is where new nail cells are made. The pale half-moon (lunula) is the visible edge of the matrix.
The nail plate and nail bed
The nail plate is the hard part you see, made of compacted keratin. It rests on the nail bed, which is rich in blood vessels.
The cuticle
The cuticle seals the gap between skin and nail, protecting the matrix from moisture and germs.
How fast do nails grow?
| Fingernails | Toenails | |
|---|---|---|
| Growth per month | About 3 mm | About 1 mm |
| Time to fully replace | 4–6 months | 12–18 months |
| Faster with | Youth, warm weather, good circulation | Same |
| Slower with | Age, poor circulation, illness | Same |
Supporting healthy nail growth
Protect the cuticle instead of cutting it. Keep hands and feet moisturised. Avoid harsh chemicals and long soaks. Eat enough protein and a variety of fruit and vegetables. Stay active to support circulation to your hands and feet. Many people also use a supplement that nourishes the nail matrix from within, and give it several months.
Sources
- American Academy of Dermatology (AAD) – "Nail care tips."
- Cleveland Clinic – "Nail anatomy."
- Mayo Clinic – "Nails: how to keep your fingernails healthy and strong."
Common questions
Where do nails grow from?
Nails grow from the nail matrix, living tissue under the skin at the base of the nail.
How long does a toenail take to grow back?
A toenail takes about 12 to 18 months to fully grow out.
Why do nails grow slower with age?
Circulation and cell turnover slow with age, which reduces nail growth speed.