Just Launched
1 0

STRENGTH — Strengthening Nail Serum

$13.99 $13.99
  • Made in USA
    Made in USA
  • Vegan
    Vegan
  • Cruelty-Free
    Cruelty-Free

A 7-day layering serum for nails that feel weak, brittle, or worn down from constant gel cycles. Instead of one coat, it builds up over a week, working with keratin, the protein your nails are made of, to help improve resilience and strengthen nails over time.

  • Layered process. Applied in stages across a 7-day nail treatment cycle for a more thorough result than a single coat.
  • Keratin protein. Formulated with amino acids that support your nails' own structure to help build strength.
  • Use between manicures. Use this strengthening serum on bare nails to condition and strengthen before your next manicure.

Made in USA   •   Vegan   •   Cruelty-Free

Agotado
  • Free US shipping $50+
  • 60-day returns

HIGH QUALITY FORMULA

Strengthening nail Serum. 

Nail fragility is a structural problem. The nail plate is built from layers of keratin — a protein matrix — and when that matrix is compromised by gel removal cycles, water exposure, or daily mechanical stress, nails become thin, soft, and prone to breaking.

STRENGTH works at the level of the nail plate's structure. Applied in progressive layers, it deposits a reinforcing amino acid and plant protein complex directly onto the nail surface, building structural support with each coat. The effect compounds: each application bonds to the last, and the cumulative reinforcement is what drives measurable results. In user testing, 93% of users reported stronger nails after two weeks and 100% reported less fragile nails after three weeks.

STRENGTH is formulated around an amino acid and plant protein complex designed to reinforce the nail plate through repeated layered application. Acetyl Cysteine and Acetyl Methionine are keratin-supporting amino acids. Biotin provides cellular nail strength support. The plant protein base — Rice Extract, Lentil Seed Extract, Quinoa Seed Extract, and Buckwheat Seed Extract — delivers conditioning from multiple plant sources. Apricot Kernel Oil provides emollient support. Formulated without animal-derived ingredients. Vegan and cruelty-free. Made in USA.

Key actives: 
Acetyl Cysteine — amino acid, keratin building block. 
Acetyl Methionine — amino acid, keratin building block. 
Biotin — nail strength support. 
Oryza Sativa (Rice) Extract — protein-rich conditioning. 
Lens Esculenta (Lentil) Seed Extract — strengthening. Chenopodium Quinoa Seed Extract — plant protein. 
Prunus Armeniaca (Apricot) Kernel Oil — conditioning emollient.

Ingredients: Alcohol Denat., Ethyl Acetate, Butyl Acetate, Nitrocellulose, Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer, Methoxyisopropanol, Alcohol, Acetyl Tributyl Citrate, Amyl Acetate, Triethyl Citrate, Etocrylene, Caprylic/Capric Triglyceride, N-Butyl Alcohol, Water, Glycerin, Prunus Armeniaca Kernel Oil, Isoamyl Laurate, Kaempferia Galanga Root Extract, Pongamia Pinnata Seed Extract, Isopropyl Alcohol, Polygonum Fagopyrum (Buckwheat) Seed Extract, Oryza Sativa (Rice) Extract, Lens Esculenta (Lentil) Seed Extract, Chenopodium Quinoa Seed Extract, Hydrolyzed Cicer Seed Extract, Red 6 Lake, Acetyl Tributyl Citrate, Acetyl Cysteine, Acetyl Methionine, Sodium Benzoate, Potassium Sorbate, Violet 2, Biotin

HOW TO USE

The key to a stronger nail.

ApplicationApplication - 7 day protocol

DAY 1: Apply one thin, even coat to clean, bare nails.
DAY 3: Apply a second coat directly over the first. No removal.
DAY 5: Apply a third coat over the previous layers.
DAY 7: Remove completely. Rest nails, then start again.

Repeat this 7-day cycle for 2-3 weeks for best results.

Do not remove between coat applications. The layering is intentional. Progressive build-up is how STRENGTH delivers structural reinforcement.

After Removal - Day 7

  1. Remove. Use acetone to break down and lift the layered formula completely.
  2. Rest. Give nails time before starting the next cycle or applying gel polish.
  3. Moisturize. Apply NOURISH immediately after removal. Acetone is drying.

Never peel or pick the layered serum off. This removes layers of the natural nail with it.

Pair your gel polish with the

Perfect Nail Lamp

Take the Quiz Shop Nail Lamps
YOUR FAVORITES

As Seen on #NAILTOK.

Questions, sorted

Everything before your first cure.FAQs

The questions our customer team actually gets — answered plainly, no manual-speak.

Contact our team

STRENGTH is a layering serum for nails that feel weak, brittle or worn down from constant gel cycles. Instead of a single coat, it builds up over a 7-day cycle. Its amino acid and plant protein complex supports keratin, the protein your nails are made of, to help improve resilience and strengthen nails over time.

STRENGTH works on the structure of the nail plate. Nails are built from layers of keratin, and gel removal, water exposure and daily wear can leave them thin, soft and prone to breaking. Each coat deposits an amino acid and plant protein complex onto the nail surface, and each layer bonds to the last, so the reinforcement builds over the cycle.

A strengthening serum helps weak, brittle nails become more resilient between manicures. In user testing, 93% of participants reported stronger nails after two weeks of STRENGTH, and 100% reported less fragile nails after three weeks.

Most users notice a difference within two weeks. In user testing, 93% reported stronger nails after two weeks and 100% reported less fragile nails after three weeks. For best results, repeat the 7-day cycle for 2–3 weeks.

Apply STRENGTH three times over a 7-day cycle: on day 1, day 3 and day 5, layering each coat over the last. Remove it on day 7 and repeat the cycle for 2–3 weeks for best results.

No. Don't remove STRENGTH between applications. Each new coat goes directly over the previous one, and that build-up is what delivers the strengthening effect. Remove it only on day 7.

On day 7, use acetone to break down and lift the layered formula completely. Never peel or pick the serum off, because that removes layers of the natural nail with it. Acetone is drying, so apply NOURISH – Hydrating Cuticle Oil right after removal.

STRENGTH is designed for bare nails between gel manicures, when your nails need to recover. Complete the cycle, remove it, rest your nails, then go back to gel. Don't apply gel over STRENGTH.

No. STRENGTH is an air-dry serum, so there's nothing to cure.

Use STRENGTH to reinforce weak nails over its 7-day cycle, and NOURISH right after each removal to rehydrate nails and cuticles. Between cycles, GLOW evens out nail tone for a natural, polished look.

Stay in the glow

10% off your first order.

By signing up you agree to receive marketing from SUNUV. Unsubscribe anytime.

By signing up you agree to receive marketing emails. Unsubscribe anytime.