Brittle, Splitting Nails After 50: What Helps?What Studies Show

Nails that split into layers at the tip, peel, or snap at the slightest knock are common, especially after 50. An international panel of nail specialists reviewed what’s known.¹

How common it is

Brittle nails affect up to 20% of people, especially women over 50, and fingernails more often than toenails.¹ Brittle nails split, flake and crumble, and become soft and less elastic.¹

First, look for a cause

The review separates two kinds:¹

• Brittle nails with a cause, such as other nail or skin conditions, infections, general health problems, injury, or changes in how much water the nail holds.
• Brittle nail syndrome, where no cause is found.

Treating any underlying cause comes first.¹ See nail changes after 50 that need a dermatologist.

What the review suggests

For brittle nails without a clear cause, the reviewers list:¹

• Moisturizers and nail lacquers designed to strengthen the nail plate.
• Supplements, especially biotin (vitamin B7), and some trace elements and amino acids, which have been reported to help.

How strong is the evidence?

Biotin. A review found trials showing firmer, harder, thicker nails with biotin, but said larger controlled trials are still needed to confirm it works and to find the right dose.²

A strengthening lacquer. In an Italian trial of 50 people, average age 64, everyone used a hydroxypropyl chitosan nail lacquer for 4 months; half also took biotin 10 mg a day.³

	Lacquer alone	Lacquer plus biotin
Average improvement in nail score	57%3	62%3
Improved by half or more	53%3	80%3

There was no untreated comparison group, and one of the researchers worked in a company’s medical department.³

Practical steps

1. Protect your nails from constant wetting, for example with gloves for dishes and cleaning, since changes in nail hydration are a known cause.¹
2. Moisturize nails and cuticles, especially after hand washing.
3. Consider a strengthening lacquer, and discuss biotin with your clinician.
4. Give it months. The trial ran for 4 months.³

See dry, cracked hands from washing.

Try: “My fingernails split and peel no matter what I do. Could anything be causing it, and is biotin or a nail lacquer worth trying?”

Skin, Head to Toe covers how to weigh a product in Chapter 4, “Four Boxes,” in a section called “The Try Box,” which asks whether a treatment was tested against a dummy in people with the same worry. Its Skin Log keeps dated photos and every product you use, so you can see whether a new routine helps. See the book.