Brittle Nails During Perimenopause: Causes and Treatments

Your nails used to be strong and now they split as soon as they grow past your fingertips. They peel in layers, break at odd angles, and seem thinner than before. If this started during your 40s, perimenopause is a likely culprit.

Why Nails Change During Perimenopause

Nails, like hair and skin, are affected by hormonal changes during the menopause transition. The connection is straightforward: estrogen supports the production of keratin, the protein that makes up your nails. As estrogen declines, keratin production slows and the quality changes.

Research published in the Journal of the European Academy of Dermatology and Venereology found that nail thickness and growth rate both decrease during the menopause transition. The study measured nail plate thickness in pre- and postmenopausal women and found a significant reduction in the postmenopausal group (Baran and Schoon, 2004).

A study in Dermatologic Clinics found that brittle nails (onychorrhexis) affect approximately 20 percent of the general population but are more prevalent in midlife women, particularly during and after perimenopause. The decline in estrogen reduces the water content and lipid composition of the nail plate, making nails drier and more prone to splitting.

Common Nail Changes

Splitting and peeling: the nail plate separates into layers (onychoschizia), particularly at the free edge
Increased brittleness: nails crack or snap with minimal force
Slower growth: nails take noticeably longer to grow
Ridging: vertical ridges running from the cuticle to the tip become more prominent. These are normal with age but can become more pronounced during perimenopause
Thinning: the nail plate becomes thinner and more flexible
Dryness: nails lose their natural sheen and look dull

Other Contributing Factors

While hormones play a primary role, several other factors common during perimenopause can compound the problem:

Iron and nutrient deficiencies Heavy or irregular periods can deplete iron stores. Iron deficiency is a well-documented cause of brittle, spoon-shaped nails (koilonychia). Low levels of zinc, biotin, and B vitamins can also affect nail integrity.

Thyroid changes Thyroid disorders become more common during midlife and can cause brittle nails. If your nail changes are accompanied by fatigue, hair loss, or unexplained weight changes, ask your doctor to check your thyroid function.

Dehydration The same hormonal shifts that cause dry skin and dry eyes reduce moisture throughout the body, including in the nails.

What Helps

Protect Your Nails

Wear gloves when washing up and using cleaning products. Water and detergents strip oils from the nail plate
Keep nails shorter during this period to reduce the surface area vulnerable to splitting
File nails in one direction rather than back and forth. A glass nail file is gentler than emery boards
Avoid gel and acrylic nail treatments, which can weaken already compromised nails during removal
Apply a nail hardener or strengthening treatment designed for peeling nails

Moisturise

Just as you need to moisturise your skin more during perimenopause, your nails benefit from hydration:

Apply cuticle oil or a thick hand cream to the nails and cuticles daily
Jojoba oil, argan oil, and vitamin E oil are all effective
Applying moisturiser after hand washing helps prevent the repeated cycle of wetting and drying that worsens brittleness

Nutrition

A well-balanced diet supports nail health:

Protein: nails are made of keratin, a protein. Adequate dietary protein is essential
Iron: particularly important if your periods are heavy. Get your levels checked
Biotin: while evidence is limited for people without deficiency, a study in the Journal of the American Academy of Dermatology found that biotin supplementation (2.5mg daily) improved nail thickness by 25 percent in patients with brittle nails (Hochman et al., 1993)
Omega-3 fatty acids: support moisture retention in the nail plate
Zinc: plays a role in keratin production and nail growth

Check with your doctor before starting supplements to identify any actual deficiencies rather than guessing. Our supplement guide has more details.

Hormone Therapy

HRT can improve nail quality by restoring the estrogen that supports keratin production. Research has shown that women using HRT tend to have better nail density and moisture content. If you are considering HRT for other perimenopause symptoms like hot flashes or mood changes, nail improvement can be an additional benefit.

When to See Your Doctor

See a doctor if:

Nail changes are sudden or dramatic
You notice discolouration (green, black, or yellow nails can indicate infection or other conditions)
Nails are separating from the nail bed
You have horizontal dents or grooves across the nails (Beau's lines, which can indicate illness)
Nail changes are accompanied by other symptoms suggesting thyroid dysfunction or nutritional deficiency
Over-the-counter treatments have not helped after several months

Your doctor can check for underlying causes and refer you to a dermatologist if needed.

Sources:

Baran, R. and Schoon, D. (2004). Nail fragility syndrome and its treatment. Journal of the European Academy of Dermatology and Venereology, 18(6), 645-651
Hochman, L.G. et al. (1993). Brittle nails: response to daily biotin supplementation. Journal of the American Academy of Dermatology, 28(5), 665-667
Iorizzo, M. et al. (2004). Brittle nails. Journal of Cosmetic Dermatology, 3(3), 138-144
Rich, P. (2007). Nail cosmetics and camouflaging techniques. Dermatologic Clinics, 25(4), 473-481