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How to Fix Brittle Hair: Causes, Treatments, Repair
Learn what causes brittle hair, how to repair it, and the best nourishing shampoo and treatment routine for dry, damaged, breakage-prone strands.
Updated on June 5, 2026 | 3 min read
Jaclyn LaBadia, Davines Writer
Key Takeaways
How to Repair Brittle and Damaged Hair
- Brittle hair is hair that snaps, breaks, or feels rough due to a damaged cuticle and lack of internal moisture.
- Common causes include heat styling, chemical processing, over-washing, and nutritional deficiencies.
- Brittle hair can be repaired with a consistent routine of nourishing shampoo, conditioner, weekly mask, and a finishing oil.
- Visible improvement typically takes 4–8 weeks of consistent care, depending on the severity of the damage.
- Choosing a gentle, sulfate-free, nourishing shampoo formulated for very dry hair is the single most impactful change you can make.
In This Article
What Is Brittle Hair?
Dry vs. Damaged vs. Brittle Hair: What’s the Difference?
What Causes Brittle Hair?
Best Brittle Hair Treatment Routine
Best Shampoo for Dry, Brittle Hair
Daily Habits That Support Brittle Hair Repair
When to See a Professional
How Long Does It Take to Fix Brittle Hair?
FAQs
What Is Brittle Hair?
If your strands feel like straw, seem impossible to detangle, and snap easily, you’re likely dealing with brittle hair. Things like coloring, chemical processing, heat styling, and everyday wear and tear disrupt the hair’s cuticle, exposing the cortex and causing moisture loss. This leaves hair brittle, and susceptible to issues like split ends, breakage, dullness, frizz and a loss of elasticity. But the right brittle hair treatment can bring your distressed tresses back to life. If you’re dealing with brittleness, keep reading, because we’ll tell you how to fix brittle hair- including the best products and tips to nourish damage.
Dry vs. Damaged vs. Brittle Hair: What’s the Difference?
So how do you know if you’re dealing with brittle hair, versus damaged or just dry strands?
Dry hair lacks moisture but is still elastic. Damaged hair has a disrupted cuticle, often from chemical or mechanical stress. Brittle hair is both dry and damaged, with reduced elasticity and active breakage; so it’s the most severe of the three conditions. To know for sure what you’re dealing with, try a simple stretch test. Pluck a damp, freshly washed, product-free strand of hair from your head. Hold it securely between the thumbs and forefingers of both hands. Slowly and gently pull the ends apart, then let it go. If it stretches slightly and bounces back to its original length when released, it’s healthy. If it snaps immediately upon pulling with very little give, it’s brittle. If it stretches far, snapping after over-stretching like gum, this is an indication of a protein imbalance. More on this below.
What Causes Brittle Hair?
Brittle hair happens as a result of a disruption in the hair’s cuticle, which exposes the cortex and causes moisture loss. The most common culprits behind brittle hair include:
- Color treating, bleaching and chemical processing
- Excessively heat styling and using hot tools without protection
- Hard water and chlorine exposure
- Over-washing or using harsh sulfate shampoos
- Environmental factors like sun, wind, and dry indoor heat
- Hormonal shifts from pregnancy, menopause, thyroid changes or certain medications
- Genetics - some people are just born with hair follicles that produce less of the natural oils needed to keep the scalp and hair hydrated.
- Deficiencies in certain nutrients, like protein, biotin, iron or vitamin D
- Too much protein from over-repairing with protein masks and treatments
Best Brittle Hair Treatment Routine
With patience, the road back to healthy strands is attainable. The best dry brittle hair treatment focuses on repairing, deep conditioning, and minimizing damage with a nourishing shampoo, conditioner, weekly mask, and a finishing oil. Follow this routine consistently to transform your dry, weak, dull, and breakage-prone hair.
Step 1: Switch to a Nourishing, Sulfate-Free Shampoo
Your repairing routine starts by mindfully washing with NOUNOU Shampoo, a nourishing sulfate-free formula. Sulfates strip already-damaged hair of its remaining moisture. Use lukewarm water, concentrating the lather at your roots, and avoid over-washing. Two to three times a week is enough for brittle hair.
Nourishing, sulfate-free shampoo for dry, brittle, processed hair.
Cleanses gently while restoring softness and slip — the foundation of the brittle-hair routine.
Step 2: Follow With a Rich Nourishing Conditioner
Follow with NOUNOU Conditioner, a rich nourishing formula for processed, brittle hair. Apply it to your mid-lengths through ends, avoiding the scalp. Let it sit for three to five minutes before rinsing with cool water.
Detangling, deeply nourishing conditioner for very dry or damaged hair.
Adds slip and softness without weighing hair down — pair with NOUNOU Shampoo.
Step 3: Add a Weekly Nourishing Hair Mask
Hair masks are essential for treating brittle hair, providing a concentrated boost of nourishment. Mask weekly in place of your regular conditioner. Place a shower cap over your hair mask and let it steam while you shave your legs, exfoliate for added absorption.
Weekly deep-conditioning mask that restores softness, body, and shine.
The most-loved mask in the NOUNOU lineup. Use in place of conditioner once a week.
Step 4: Lock In Shine and Heat Protection With a Nourishing Oil
Apply 2–3 drops of a nourishing heat protection oil to towel-dried lengths and ends before styling, and reapply on dry hair as a finishing touch. Damage from hair dryers, straighteners, and curling irons leads to brittle hair that’s more vulnerable to breakage. NOUNOU Oil protects strands up to 446°F (230°C), reducing frizz and breakage.
Up to 9× stronger and 9.9× shinier hair after one use. Heat protection up to 446°F.*
A nourishing and repairing oil for processed and brittle hair. Powered by regenerative lupin extract — proteins help strengthen and repair the fiber while polysaccharides lock in moisture.
*Instrumental test on hair strands treated with NOUNOU shampoo, conditioner and oil vs. untreated hair.
How to use: 2–3 drops to towel-dried lengths and ends; do not rinse. Can also be used as a finishing touch on dry hair.
Step 5: Eat a Hair Healthy Diet
The most important thing for hair health, above all, is a balanced diet. The best foods for healthy hair include lean proteins, omega 3 fatty acids, and vitamins and minerals. Because hair is composed almost entirely of protein, getting enough in your diet is critical for healthy hair growth and strength. Omega 3 fatty acids help your hair retain elasticity, strength, and shine, while helping smooth the cuticle. And Vitamins A, B2 (riboflavin), B3 (niacin), B7 (biotin), B9 (folate), B12, C, D, E, and minerals like iron, selenium and zinc are important for normal cell growth and function.
Best Shampoo for Dry, Brittle Hair
The best shampoo for dry brittle hair is a rich, sulfate-free, formula with conditioning agents like nourishing oils, plant-based proteins, and humectants. NOUNOU Shampoo gently cleanses, while reinforcing brittle hair from root to tip, restoring softness, smoothness, and manageability. With regenerative lupin extract, full of proteins that strengthen and repair the hair fiber, it leaves hair feeling stronger, more resilient, and easier to style.
Daily Habits That Support Brittle Hair Repair
In addition to following a consistent routine including a nourishing shampoo, conditioner, weekly mask, and a finishing oil, these daily hair habits will help repair your brittle hair.
- Always use a heat protectant (or a heat-protective oil) before any hot tool.
- Lower heat styling temps and limit heat styling to one to two times per week.
- Use a wide-tooth comb on wet hair to avoid breakage.
- Sleep on a silk or satin pillowcase to reduce friction.
- Add a few drops of nourishing NOUNOU oil to your ends nightly to lock in moisture.
When to See a Professional
In some cases, we recommend seeking professional advice, especially if the brittleness is severe or sudden. Persistent breakage despite a consistent routine may signal a scalp or medical issue. If your brittle hair is accompanied by hair loss, bald spots or scalp itching, see a dermatologist to perform scalp exams and run blood tests. If your brittleness is due to over-processing, a stylist at your local Davines salon can remove split ends, provide targeted treatments, and recommend a custom at-home routine.
How Long Does It Take to Fix Brittle Hair?
Keep in mind that damage to your hair can’t be reversed- only nourished and protected as it grows out. But with a consistent routine of nourishing shampoo, conditioner, weekly mask, and a finishing oil, brittle hair visibly improves within four to eight weeks. And with NOUNOU Oil specifically, strands are 9.9 times noticeably shinier, and up to 9 times stronger after one use.* Full repair typically takes three to six months, depending on the severity of the damage.
*Instrumental test on hair strands treated with NOUNOU shampoo, conditioner and oil vs. untreated hair.
FAQs
What causes brittle hair?
The most common causes of brittle hair include color treating, bleaching, chemical processing, heat styling, hard water and chlorine exposure, over-washing or using sulfates, environmental factors, hormonal shifts, genetics, nutritional deficiencies and a protein imbalance.
Can brittle hair be repaired?
While damage to your hair can’t be reversed, brittle hair can be repaired with a consistent routine of nourishing shampoo, conditioner, weekly mask, and a finishing oil. Visible improvement typically takes 4–8 weeks of consistent care, depending on the severity of the damage.
What is the best shampoo for dry, brittle hair?
The best shampoo for dry brittle hair is a rich, sulfate-free, formula with conditioning agents like nourishing oils, plant-based proteins, and humectants. NOUNOU Shampoo features regenerative lupin extract, and is rich in proteins that strengthen and repair the hair fiber, leaving it stronger, more resilient, and easier to style.
How long does it take to fix brittle hair?
With a consistent routine, brittle hair visibly improves within four to eight weeks. And with NOUNOU Oil specifically, strands are 12.9 times noticeably shinier, and up to 5.1 times stronger after one use.* Full repair typically takes three to six months, depending on the severity of the damage.
*Instrumental test on hair strands treated with NOUNOU shampoo, conditioner and oil vs. untreated hair.
How can I tell if my hair is dry or damaged?
Dry hair lacks moisture but is still elastic. Damaged hair has a disrupted cuticle, often from chemical or mechanical stress. Brittle hair is both dry and damaged, with reduced elasticity and active breakage. To know for sure what you’re dealing with, try a stretch test by plucking a damp, freshly washed, product-free strand of hair from your head. Hold it securely between your thumbs and forefingers and slowly and gently pull the ends apart, then let it go. If it stretches slightly and bounces back when released, it’s healthy. If it snaps immediately upon pulling with very little give, it’s brittle.
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