Brittle Nails: Causes & How to Strengthen Them | Mavala UK

Occasionally an iron deficiency or a thyroid issue plays a part, but for most of us the answer is at the kitchen sink, not in the bloodstream. That is good news, because brittle nails respond remarkably well to the right care. The nail plate is constantly growing, so what you do over the next two to three months decides whether the new nail coming through is flexible and strong, or dry and prone to snapping.

If your nails break, peel or split, the single most likely culprit is the wet-dry cycle. Every time your hands go into water, the nail plate swells as it absorbs moisture; as it dries, it contracts again. Repeat that ten or twenty times a day, with detergent stripping the nail's natural lipids along the way, and the keratin layers gradually loosen and lose their flexibility. The result is a weak nail that looks fine but snaps or flakes at the slightest knock.

This is why brittle nails are so common among people who wash up without gloves, work in healthcare or hospitality, or simply wash their hands frequently. It is also why the fix starts with protection, not just products: wear gloves for washing up and household chores, and moisturise after every handwash where you can.

Here is the myth worth busting: a strong nail is not a hard nail. A healthy nail is slightly flexible; it bends a little under pressure and springs back. A nail that is too hard, or too dry, has nowhere to go but snap. Many people assume that because their nails break they need a nail hardener, when in fact the nail is already too hard and starved of moisture, and more hardener only makes the problem worse.

For that dry, rigid nail type, the answer is moisture rather than reinforcement: Mava-Flex Serum is Mavala's moisturising serum for dry, hard nails, restoring the oil and moisture the plate needs so the nail bends rather than breaks when it meets a solid object. The quick test: if your nails feel rigid and snap cleanly, think flexibility first; if they feel soft and thin and tear or peel, think reinforcement. The routine below covers both.

A few everyday habits quietly accelerate the damage:

• Acetone removers strip oils from the nail plate as well as the polish. Choose a low or nil-acetone remover and keep removal to once or twice a week at most.
• Gel and acrylic removal is one of the harshest things a nail goes through, between the prolonged acetone soak and the scraping. If your nails turned brittle after a run of gel manicures, give them a recovery break with a strengthening course before the next set.
• Filing back and forth saws the keratin layers apart. Use the fine side of an emery board, file in one direction from the side towards the centre, and avoid coarse metal files altogether.
• Using nails as tools: prising open tins, scratching labels off jars, tearing open packages. Every one of these flexes the free edge past its limit.

Lynn's note: "When someone tells me their nails suddenly turned brittle, my first question is never about diet. It is almost always the marigolds question: do you wear gloves for washing up? Nine times out of ten that, plus a kinder remover, is where the recovery starts."

This is the approach Mavala has refined since 1959, and it takes minutes a week. Match the steps to your nail type from the section above:

• Scientifique K+ is the reinforcement step for nails that split and break. Mavala's nail hardener is designed for brittle or splitting nails and fortifies the most delicate part of the nail: the tip. Brush it along the free edge only, as a course over a few weeks, then taper to a maintenance application.
• Mava-Strong is your daily base coat. It restores strength and resilience to thin, soft and brittle nails, and protects the plate from the water and detergent exposure that caused the problem in the first place. Wear it under polish or on its own.
• Nailactan feeds the new nail at the root. This nutritive cream, enriched with essential amino acids, lipids and strengthening vitamins, is massaged into the base of the nail to nourish the matrix, so the growth coming through is stronger than the nail it replaces.
• Mavaderma speeds the grow-out. A nourishing massage oil that promotes natural nail growth, useful when you want the damaged length replaced sooner.
• Cuticle Oil seals the deal. Massaged into the nail and surrounding skin every evening, it replaces the lipids the day has stripped out and keeps the new growth coming through supple rather than dry.

If you would rather have the routine chosen for you, there is a set built for exactly this problem. The Revive Collection for Splitting & Flaking Nails pairs Nailactan, to nourish the root, with Scientifique K+, to reinforce the tip, and adds a complimentary trial-size hand cream and a pouch of mini emery boards for gentle maintenance on the go. It is a targeted rescue routine for weak, peeling and splitting nails in one box, and you will find it alongside the other Mavala sets in Save on Sets.

The routine above rebuilds; these habits stop you undoing the work:

• Gloves for wet work, and dry work too. Cotton-lined rubber gloves for washing up and cleaning, and cotton gloves even for dusting and tidying. This is the cheapest, most effective nail treatment there is.
• Hand cream after washing. Keep one by every sink. For hands that are already dry and roughened by water and detergents, Mava-Plus Hand Cream is the intensive option for very dry, hardworking hands.
• Keep nails a sensible length while they recover. A shorter free edge has less leverage to catch and tear, and a rounded or soft square shape gives the tip a wider edge to take the brunt of any knocks.
• File little and often with a fine emery board, in one direction, rather than letting nails grow until they snag.

Most brittle nails are environmental and improve within two to three months of consistent care. But a few signs deserve a professional opinion rather than a product:

• A sudden change in texture across all ten nails, with no change in your routine
• Brittleness alongside fatigue, hair thinning or feeling unusually cold, which can point to iron deficiency or an underactive thyroid
• Nails that lift from the nail bed, change colour, or develop deep horizontal ridges

None of these are cause for alarm, but they are worth a quick conversation with your GP or pharmacist, who can rule out the medical causes with a simple blood test.

The most common cause is dehydration of the nail plate from repeated wetting and drying, detergents and acetone-based removers, which strip the nail's natural oils. Age plays a part too, as oil production slows over time, and gel or acrylic removal is a frequent trigger. Less commonly, iron deficiency or thyroid problems can cause brittleness; suspect these only if all your nails change suddenly alongside other symptoms.

Protect and rebuild at the same time. Wear gloves for wet work, switch to a low-acetone remover, and file gently in one direction with a fine emery board. Then strengthen: a course of Scientifique K+ along the free edge to reinforce the tip, Mava-Strong as a daily protective base, Nailactan to nourish the root, and cuticle oil every evening to restore moisture. Expect visible improvement within weeks and full recovery as the new nail grows through.

Iron deficiency is the one most often linked to brittle nails, and an underactive thyroid can also change nail texture. That said, deficiencies are a much rarer cause than everyday water and detergent exposure. If your diet is reasonably balanced and only some nails are affected, look to your routine first; if every nail has changed and you feel run down, ask your GP about a blood test.

It depends on why your nails break. If they are soft, thin and tearing, a hardener like Scientifique K+, applied along the free edge as a course, reinforces exactly where splitting nails fail. But if your nails are already hard, dry and snapping cleanly, more hardener makes things worse: they need moisture and flexibility instead, which is what Mava-Flex Serum is for. Pair either with a daily cuticle oil so the plate keeps its essential flex.

No. Polish actually shields the nail from water and detergent, so a manicure can help rather than hinder, as long as you use a treatment base coat such as Mava-Strong underneath and remove polish gently with a low-acetone remover no more than once or twice a week. The exception is gels and acrylics: give brittle nails a break from those until they have recovered.

Lynn Gray is Mavala UK's resident nail expert. She has worked with the Mavala brand for over a decade, training nail technicians and beauty editors across the UK and writing Mavala's how-to guides.

Lynn's view: "Brittle nails feel like a mystery, but they are usually the most solvable nail problem of all. Protect them from water, feed them oil, reinforce the tip, and in two months you are looking at a different set of nails. The only people I cannot help are the ones still opening parcels with them."

• Revive Collection for Splitting & Flaking Nails: the matched rescue set for weak, peeling nails
• Scientifique K+: nail hardener for brittle, splitting nails, fortifies the tip
• Mava-Strong: fortifying base coat for thin, soft and brittle nails
• Nailactan: nutritive cream that nourishes the nail at the root
• Mava-Flex Serum: moisturising serum for dry, hard nails that snap
• Mavaderma: nourishing massage oil to promote natural nail growth
• Cuticle Oil: daily nourishment for nails and nail contours