6 Common Causes of Brittle Nails in Women Over 50—Plus Expert Tips To Strengthen Them
Plus learn when brittle nails could point to something more serious
When nails split, peel or lose their shine, it can feel like just another beauty frustration. But brittle nails aren’t only about looks—they’re a reflection of how nails age and respond to daily stress. And everything from menopause to medical conditions like thyroid disease can affect your nail health.
“Think of brittle nails that have a tendency to break as analogous to overly-processed hair that frizzes and has ends that split,” says Dana Stern, MD, a New York City dermatologist who specializes in nail health. “We condition and protect our hair to avoid these issues. To avoid future broken nails, you need to take care of your nails and use the right products.”
Symptoms of brittle nails
There’s little mystery when it comes to brittle nails—the warning signs are right there on your fingertips. As Dr. Stern notes, brittle nails are weak and fragile, so you’ll notice:
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- Peeling
- Splitting
- Breaking
The first giveaway is peeling or splitting at the tips, as if the nail is coming off in layers, she says. Ridges that run vertically from the cuticle to the tip also become more noticeable as nails weaken. Other changes include thinning, roughness, a chalky look and in some cases, lifting from the nail bed. That can leave the nail looking opaque or white, and sometimes yellow or brown if debris slips underneath.
6 common causes of brittle nails
Brittle nails aren’t caused by just one thing. Dr. Stern says they stem from both changes inside the body and everyday exposures to things like harsh chemicals that chip away at nail strength. Some of the most common culprits include:
Aging
On the internal side, aging itself reshapes nail biology. The nail’s growth plate can thin with time, leading to ridges, while circulation to the hands and feet naturally slows, Dr. Stern notes. “For example, paralyzed patients often have more brittle nails on the affected side because blood flow is reduced,” Dr. Stern explains.
Menopause
Menopause adds another shift: Levels of cholesterol sulfate, a substance that helps the nail plate stay flexible, decline with age. This may help explain why brittle nails are more common in women, Dr. Stern says.
Underlying health conditions
Genetics also play a role, and certain conditions, including thyroid disease, Raynaud’s disease and a protein deficiency, can show up first in the nails. (See the early warning signs of thyroid problems.)
Frequently washing your hands
“Nails are extremely absorptive of water, even more so than skin,” Dr. Stern says. “When water is constantly moving in and out [as you’re wetting and drying your hands], it puts a tremendous strain on the nail cells and can result in weakening, softening and breakage.”
Harsh chemicals
Solvents in nail polish removers, long gel soaks and alcohol-based hand sanitizers further strip moisture. And some “nail hardeners” with formaldehyde can paradoxically make nails more brittle and even trigger allergic reactions in the surrounding skin, leaving nail folds red, swollen and painful.
Weather changes
Even the weather can contribute to brittle nails. Moving from cold outdoor air to heated indoor spaces causes nails to expand and contract, which puts extra stress on the nail plate and worsens brittleness, Dr. Stern says.
How to strengthen brittle nails: 7 easy tips
The good news: Brittle nails can bounce back once you tackle both inside and outside factors. Here’s how to strengthen your nails.
Treat health issues
Dr. Stern says correcting underlying medical issues makes the biggest difference. Low iron or thyroid disorders can show up first in the nails, so she advises women to get checked if brittleness persists. Working with your doctor on a fix, like taking an iron supplement or hormone replacement meds, can go a long way toward healing brittle nails.
Boost blood flow
Circulation plays a surprising role in warding off brittle nails: “Make sure you are getting enough cardiovascular exercise,” Dr. Stern says. “Nails derive oxygen and nutrients from the blood stream and so good peripheral circulation (blood flow) is important for healthy nails.” Get tips to improve your circulation naturally here.
File smarter
Cardboard emery boards cause microscopic tears that lead to peeling, Dr. Stern says. But a glass file creates a clean edge and makes nails more resistant to splitting.
Moisturize your hands and nails
“It’s one of the most overlooked steps in nail care,” she emphasizes. Applying hand cream or an ointment after washing helps nails hold onto water and improves nail health. Heavier occlusive moisturizers, like ointments or thick creams, are especially effective, and formulas with alpha hydroxy acids (AHAs) can improve the flexibility of fragile nails.
Choose gentler removers
Acetone is the harshest nail polish remover. Instead, look for conditioning formulas with added oils and avoid long gel removal soaks, she says.
Skip unnecessary supplements
Despite the hype, Dr. Stern says studies haven’t shown clear benefits for biotin supplementation. This B-vitamin is often found in hair, skin and nail supplements. While biotin deficiency can cause brittle nails, it is very rare and research hasn’t shown strong benefits for women who aren’t deficient, she says.
“In most cases, eating a balanced diet with enough protein and iron-rich foods will do more for nail health than taking extra pills,” Dr. Stern adds. Learn how much protein you really need for your age.
Consider a topical treatment
For women looking for proven topical treatments, she points to products with glycolic acid, which exfoliates and hydrates the nail plate, improving flexibility. She recommends her own Dr. Dana Nail Renewal System, which incorporates this ingredient specifically for nails.
When to see a dermatologist for brittle nails
Most cases of brittle nails are harmless, but knowing when to get checked can help you protect both your nails and your overall health. Dr. Stern says women should check in with a dermatologist if:
- Only one nail is affected
- There is pain, swelling or discoloration in or around the nail
- Brittle nails develop suddenly or worsen quickly. “Importantly, a sudden change becomes relevant,” she explains. “For example, you always had amazing nails and suddenly all of your nails are extremely thin and brittle.”
- There are signs of fungal infection such as thickening, yellowing or debris under the nail
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