Hair coarseness and nail hardness, any correlation?

I was thinking about this when I was doing my nails (something I don't do often) today.

My nails are tough. I clip/trim them regularly to keep them at a manageable length. I have special clippers for my toenails because they are thick. Not fungus thick, just thick.

I break a nail a couple of times a year. Although I am lazy about nail care, other than trimming, they grow well and are pretty tough.

I wondered if this also related to my having hair on the coarse side of medium. Hair and nails both contain keratin, so I wondered of people prone to having coarse hair strands also have thicker nails and vice versa. I mean, I have often seen pictures of extremely long natural nails on people from East Asia and India, and these are also places where people stereotypically have coarse hair strands.

So, how do you hair and nails match up?
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Med/Coarse, porous curly.


  • Tomorrow Never KnowsTomorrow Never Knows Posts: 320Registered Users
    Interesting idea! Yup, I have coarser hair and somewhat thicker nails/toenails especially.
    Type 2b/2c, med/coarse, low porosity, medium density

    Co-wash: Suave Naturals Tangerine, Live Clean Moisturizing, CJ Daily Fix, GTTT, Tigi MM

    Conditioner: Tigi MM, Jessicurl WDT, CJ Curl Rehab, CJ Daily Smoothing, CJ H&B Deep Fix

    Deep Treatment: same as rinse out

    Leave-in: KCKT or my rinseout

    Styling Aids: Alberto/V05 Gel, HETT/HESMU, KCCC
  • xcptnlxcptnl Posts: 15,678Registered Users
    Very interesting. My hair is fine fine fine and my nails break wicked easy and I am always snapping them on something. I would consider my nails very fragile.
    Central Massachusetts

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  • goobernutgoobernut Posts: 2,317Registered Users
    Ooh same here. Fine/thin hair, horrible thin nails. They are constantly breaking and I even have this horrible split I can't get rid of on my thumb. however, my fine hair doesn't damage easy -- its pretty resilient. I never get split ends. My nails are also very ridged.
    Grand Goobah Caedran, Aqueous Infusion of Demulcents, Order of the Curly Crusaders

    Fia 2cFi, fine texture, med porosity CG 5-29-09 * My hair loves protein! Currently using : DermOrganics Shampoo and IHM, G2B Kinkier Mousse, Re:Coil VMM, Anything Spiral Solutions! MO Sealing. Coconut Oil Pre-Poo, once a month Hard Water shampoo. Avoiding Glycerin in finishing products.
  • CurlyHairedFarmerCurlyHairedFarmer Posts: 3,073Registered Users
    I have slightly fine hair, but my nails are extremely hard and never break. Who knows!
    Currently Loving:
    Shampoo: Giovanni 50:50

    Conditioners - CJ Strengthening, CJ Beauticurls Argan and Olive Oil, CJ Rehab, CJ Curl Fix

    Leave-in: CJ Smoothing

    Deep Conditioner: CJ Hibiscus and Banana Deep Fix

    Stylers - Tigi Curls Rock Amplifier, AG:Recoil, KCCC, Mop-C Curling Cream, Paul Mitchell Sculpting foam
  • redcelticcurlsredcelticcurls Posts: 17,502Registered Users
    I have slightly fine hair, but my nails are extremely hard and never break. Who knows!

    Ah, someone to disprove the theory! :)
    Kiva! Microfinance works.

    Med/Coarse, porous curly.
  • freecurlfreecurl Posts: 281Registered Users
    xcptnl wrote: »
    Very interesting. My hair is fine fine fine and my nails break wicked easy and I am always snapping them on something. I would consider my nails very fragile.

    Same here. I always thought there was a correlation with fine hair and weak, fragile nails.
  • kmd303kmd303 Posts: 71Registered Users
    Nope. :) I have the finest hair imaginable ( you can't even see the individual strands fine ) but very strong thick nails. Never chip and almost impossible to cut and they grow long. Sorry.
  • kasdenkasden Posts: 1,040Registered Users Curl Neophyte
    I feel like I just had an 'aha' moment! I have fine hair and very thin nails. They're also very flexible - they bend easily, but at least they don't break often. mom has the same fine hair (not curly) and very thick nails.

    Goob - I also have a sort of split. It runs the length of the nail, not across. It's kinda like the valley of a ridge that is super thin.
    2c/3a, fine, low-med porosity, below BSL, mod CG since 9/09

    "I'm fairly certain that given a cape and a nice tiara, I could save the world." - Leigh Standley
  • xodevinxodevin Posts: 478Registered Users
    Oooh, weird but maybe true! I have fine hair (but thick) and my nails are kind of prone to breaking. :(
    I think you're onto something!
    curly hair and proud (:
  • Curls=BeautyCurls=Beauty Posts: 1,781Registered Users
    Very good question. I have often thought about this.
    I have coarse hair and strong, thick nails that grow very fast.
    Cleanser: Liquid Castile Soap diluted in a foaming soap dispenser
    ACV rinse
    Oyin Handmade Greg Juice or Juices and Berries
    Stylers: Botticelli Botanicals Styling Mudd, KCCC, Honey Rinses and BRHG, Crack Leave-in Hair Cream when straightening

    Tools: Silk pillowcase, Floursack towels, Jersey T-Shirts, Wide Tooth Comb, Velecta Paramount TGR-VQX Hair Dryer (for when I straighten) and BaByliss PRO Ionic Rollabout Hard Hat Dryer
  • burgundy_locksburgundy_locks Posts: 2,420Registered Users
    While my nails don't break off completely, my nails top layer sometimes split apart. What I do know is that my hair and nails grow fast!
    para los gustos se hicieron los colores

    i has no hair type? (medium, f-iii), normal porosity, LOW elasticity.
    CG journey began 2/8/09 - 4-08-09.. and then mod cg 4/14/09 -... 03/02/10- Barely CG but I like CG products :)
    wash with Low Poo or Poo
    condition with GVP Conditioning Balm or CJ BC Daily, Loreal Color Vive for Color Treated Hair Thats Normal
    Leave ins- Garnier S&S; Marrakesh oil
    style with - Ohm SHP; KCCC- BRHG or Boots- KCCC- BRHG; CIAB; CCCC
    Protein- GVP Joico K-Pak
    Play with ACV
  • kathymackkathymack Posts: 9,999Registered Users
    Fine hair, natural nails pretty strong.
    3a (Corkicelli), highlighted, fine, low porosity
    SE PA

    HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me, Aloe Fix
  • wavyRwavyR Posts: 129Registered Users
    my hair isn't fine, but most of it isn't coarse. (i've noticed that i have a couple of strands here and there that are coarse.) i find that my fingernails break easily without any nail polish on it. toe nails on the other hand, are very strong.
    2b/c, med./coarse texture, med./high density & mod. porous /home/leaving?" class="Popup
    LOVE tresemme naturals, suave pomegranate, ecostyler, HESMU, BRHG, KCCC, CIAB, CCCClite, KY Jelly & JCN&S. HATE soy protein.


  • murrrcatmurrrcat Posts: 9,596Registered Users
    hmm my hair is course, maybe, its medium course, and my nails are hard as crap.
  • NalliaNallia Posts: 2,979Registered Users
    I have very fine hair and thick, very hard nails. My nails don't bend like most people's. They are too hard. Hitting them on things that would make most people's nails bend makes mine hurt like hell, as if I'm wearing acrylics. Because they are so hard, they will just snap--and they usually snap low and bleed. Thankfully, they don't do it often. I'm constantly told that they look like I have a French manicure when I have no polish on them at all.
    "...just because you're paranoid doesn't mean that there isn't an invisible demon about to eat your face." ~Harry Dresden

  • likethegumlikethegum Posts: 494Registered Users
    Fine hair and thin, flexible nails here!
    3b/3a - CG since 04-30-2009
    fine texture, med porosity

    GTTT, Live Clean, EO Sweet Orange
    Condish: Calia, AO Rosa Mosqueta/White Camellia/Honeysuckle Rose/Island Naturals/GPB, ABBA Pure Gentle, Desert Essence Shea Butter
    DT: Usually just use one of my richer conditioners, sometimes add oils or honey
    Gels: Homemade FSG!!!, Druide, BRHG, Alba Soft Hold Style Cream,

    experimenting with: honey, agave, oils, butters, ACV, Curls Milkshake, more conditioners

  • elitaelita Posts: 402Registered Users
    I always thought nail hardness was related more to thickness of hair. I have fine, very thick hair and very hard nails. I need a toenail clipper to cut my fingernails because the smaller clippers don't have enough leverage. My son has coarse, thick hair and hard nails also.
    2a underneath, 2b/c on top, medium texture, low porosity, normal elasticity, high density
    mod-CG since Feb 2009
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  • CurlyToastCurlyToast Posts: 579Registered Users
    I have super thick, coarse hair . . . and the peeliest, thinnest, bendiest, crappiest nails on the planet. But both hair and nails grow super fast, under normal conditions.
  • ninja dogninja dog Posts: 23,780Registered Users
    I have slightly fine hair, but my nails are extremely hard and never break. Who knows!

    Ah, someone to disprove the theory! :)

    Me too. My nails are ridiculously hard and fast growing, but my hair is somewhat fine and merely 2b/c (humidity, yadayadayada).
  • solidgoldsolidgold Posts: 1,485Registered Users
    My ring finger nails on both hands are very ridged and super fragile. Other nails normal. Toenails getting more thin with age. Hair is medium. Hair and nails grow pretty fast.
    Knightess Firmus Aurum, Maid of the Mitten, Slayer of Dissertation Dragons in the Order of the Curly Crusaders
    2b/medium; CG 5/20/09
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  • Gemini13Gemini13 Posts: 5,000Registered Users
    Not I- my hair is of medium coarseness, and my nails are very thin and flexible.
    Brooklyn, NY

    Hair: 3A/B, Underlayer of 2B
    HG products:
    Winter- Giovanni Tea Tree (co-wash) & 50/50 (condish); Curl Junkie Curl Assurance Leave-In; Curls Milkshake & Quenched Curls; Re:coil; BRHG
    Summer: DevaCurl No Poo & OneC; CK; Re:coil; BRHG; Honey!!!

    fotki pw= crrrls
  • kaysarakaysara Posts: 152Registered Users
    That describes me. I have medium-coarse hair and my fingernails/toenails have always been very strong bordering on difficult to cut. They also grow like there's no tomorrow.
    3a/2c, medium texture, thick and dense, normal porosity/elasticity. Cone free since 5/1/09.

    Low Poo: SheaM C&S
    Condish: GFS&SZero or SheaM WCR
    Stylers: UFDCM + LALSG
  • janeylizjaneyliz Posts: 777Registered Users
    Coarse hair and hard nails that grow fast. Toenails are impossible to cut unless I've soaked my feet for an hour. SO is exactly the same.
    Marchioness Chinoise in the land of Mancunia Productia Junkia in the Order of the Curly Crusaders

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  • belasunabelasuna Posts: 599Registered Users
    Very interesting.

    I have evenly mixed texture. fine, med, coarse and super thin, flexible, easily broken fingernails. But my toenails are pretty strong.
    ~belasuna :angel1:
    3a/b, very dry, fine/med-coarse, high porosity
    CG since 7/27/09
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    CO: protein free MRcondish
    Styler: FSG + protein free LI Elixir, Gellie, Shine & Seal Serum
    Lady of Elixir, Keeper of the Secret Blend, in the Order of the Curly Crusaders
  • AlexjoujouAlexjoujou Posts: 2,364Registered Users
    Fine, thin hair and fine thin nails..bendable (except my thumbs) any which way without breaking. ALWAYS tearing off.

    It's always been this way! UGH!
    FIA 2c/3aFi

    Done experimenting! Loving Spiral Solutions products!

    Blog: /home/leaving?" class="Popup
  • crystal tipscrystal tips Posts: 240Registered Users
    Have also been thinking about this very issue! Also add Keratosis Pilaris into the mix - where keratin builds up in hair follicles and causes bumps. I have medium coarse hair, very tough, strong nails and keratosis pilaris on backs of arms (although this is a lot less noticeable now that I am older - in my teens it was awful!)
    UK - 3a/b med/coarse - mix normal/ high porosity.
    Currently in my rotation:
    Cleanser/Cowash: CJDF,
    Tresemme Naturals, DGJ Hairjuice clarifying, Urtekram Lavender
    Conditioners/DT's: CJH&BDF, CJCR, DBPSC, AOWC, Y2C
    Protein: AOGPB, Joico Reconstruct Condish (regular not PT)
    Leave Ins/Curl Creams: CJCCCC, CJ Smoothing, KeraCare/JCAC
    Gel: FSG, BRHG, Giovanni LA Natural Styling Gel, L'Oreal Studio Mineral Control Invisi'Gel
    /home/leaving?" class="Popup
  • redcelticcurlsredcelticcurls Posts: 17,502Registered Users
    I have KP too on the backs of the arms and the fronts of my thighs.
    Kiva! Microfinance works.

    Med/Coarse, porous curly.