Shampoo is making hair rough and dry

Hi,
I have recently formulated this shampoo. It contains 
Sles (70%) 8%
Sls4%
Capb 7%
Glucoside 4%
Cdea 4%
Tween 60 1.5%
Tea tree oil and tocopherol 1.5%
Polyquartenium 7 3%
Edta0.5%
Quartenized panthenol 1%
Extract 6%
Hydantoin 1% as preservative 
Now the issue here is that i have had very few complaints recently which say that their hair become dry and rough after the using the shampoo. These complaints represent like 3 out of a 100 people who have used this product nevertheless i would like to resolve this issue.
Kindly suggest any tweaks or substitutions i can make to this issue go away.
Thanks in advance. 

Comments

  • PerryPerry Administrator, Professional Chemist
    You have 5 surfactants in this system.  Why?  
    Here are my guesses.
    1.  You have SLES as the main detergent. That's fine
    2.  You have SLS to boost the foam a bit. Makes sense since SLES doesn't foam great.
    3.  You have Cocamidopropyl Betaine to make foam creamier & affect rheology.  Ok?
    4. Glucoside?  Why?
    5. Cocamide DEA?  Why?  Especially at 4%?  yikes!

    Why is Tea Tree oil in the formula? If your shampoo is working properly, this will get washed away without having an effect. If it is your fragrance well, ok.

    Polyquaternium 7 - Why at 3%? That seems a lot higher than you need. 1% should do.

    Quarternized panthenol?  1% of this? That's a waste since it won't have any effect. Especially won't have an effect with the presence of Polyquaternium 7!

    Extract 6%?  A complete waste of money since it doesn't do anything.

    Hydantoin - preservative. Ok that makes sense.

    Suggested tweaks - Get down to 3 surfactants. Reduce level of extracts, panthenol & tea tree oil to less than 1%. Reduce level of Polyquat 7 to 1%.  Then see what you get.
  • OkmOkm Member
    Thank you very much for your insights @Perry.
    I will follow your suggested tweaks and see how that turns out as well.
    I am still relatively inexperienced so do correct if i am wrong.
    First
    My bad i should have mentioned its suppose to act like the 2 in 1  conditioner plus shampoo of sorts thats why i added all those additional additives plus they are good for marketing purposes i think. 
    I kept my main surfactant concentration low so that it doesn't make the hair too dry ( under 10 % ) and tried to counter it with additional co- surfactants like glucoside and cdea ( it also enhances the rheolgy as well i think) . 
    Again thanks for you response. 😀


  • AbdullahAbdullah Member
    Remove Glucoside and dea
    The drying effect will be solved
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