Study of the Composition of 140 Shampoos: Similarities and Differences Depending on the Sales Channel Used

    March 2019 in “ European Journal of Dermatology ”
    Céline Couteau, Harona Diarra, Zaiane Schmitt, Laurence Coiffard
    Image of study
    TLDR Pharmacy-sold shampoos tend to have fewer allergens compared to those sold in other stores.
    The study examined 140 shampoos to determine if their compositions varied based on where they were sold: pharmacies, mass-market stores, or mail-order retailers. It categorized the shampoos into four types: gentle, infant-formulated, anti-dandruff, and non-specific claim. The findings revealed that shampoos from pharmacies generally contained fewer allergens, with baby shampoos being allergen-free. Anti-dandruff shampoos from pharmacies also had a wider range of active ingredients. While the cleansing bases were similar across sales channels, there was a notable difference in the number of preservatives and allergens, with pharmacy-sold shampoos having fewer allergens. The study concluded that the term "gentle" does not necessarily mean free of allergens or irritants, and that pharmacy-sold shampoos are less likely to contain allergens listed under Regulation (EC) No. 1223/2009.
    Discuss this study in the Community →

    Research cited in this study

    6 / 6 results

    Related Community Posts Join

    6 / 1000+ results

      community Head itch even though I use keto shampoo

      in Ketoconazole  3 upvotes 4 weeks ago
      The user experiences scalp itchiness despite using ketoconazole shampoo and is also taking oral finasteride and minoxidil. Suggestions include trying different shampoos like Head & Shoulders, using salicylic acid products, considering allergies, and consulting a dermatologist for alternatives like Ciclopirox.
      [object Object]

      community Question about Castor oil and other oils?

      in Question  6 upvotes 6 years ago
      Castor oil's effectiveness for male pattern baldness, receding hairline, and thinning crown is questioned, including its application method and potential side effects. The user also mentions experiencing hair shedding with coconut oil.

      community "DHT Itch" and onset Seborrheic Dermatitis

      in Research/Science  76 upvotes 1 year ago
      The post and conversation discuss the link between DHT (a hormone), scalp itchiness, and hair loss. Some users share their experiences and treatments, including the use of fluconazole, corticosteroids, and ketoconazole shampoo, with one user suspecting minoxidil as a potential cause of their symptoms.

      community Starting Pyrilutamide BID. First dose was yesterday. Diffuse thinning. I will put my full regimen below.

      in Research/Science  89 upvotes 2 years ago
      A user's regimen to help with their diffuse thinning, which includes taking Pyrilutamide BID, 1mg finasteride daily, 2.5mg oral minoxidil daily, topical minoxidil since August 2021, LLLT every two days, topical fin, progesterone, melatonin, minoxidil (started one week ago), pumpkin seed oil and not dermarolling; other commenters suggested Nizoral for dandruff control and caution when using pre-mixed products with Pyrilutamide.

      community Fin/Min/VitD 3 month progress pics

       119 upvotes 6 years ago
      A user shared their positive 3-month experience using finasteride, minoxidil, and vitamin D to treat hair loss, noting significant regrowth and minimal shedding. They also discussed potential side effects and the low likelihood of experiencing them, while being open to answering further questions.

    Related Research

    3 / 3 results