Article by: Perry Romanowski

Welcome to Day 4 of the 30 Days to Become a Better Cosmetic Chemist series

Get the 30 days to become a better cosmetic chemist book

This 30 day challenge is all about giving you basic exercises that will improve your abilities as a cosmetic chemist. Skin

In this episode

In today’s episode I’ll share:

  • The key skin structures every cosmetic chemist needs to know
  • How skin grows
  • Where cosmetics are allowed to work on skin
  • The 10 unsolved problems in skin care

Relevant to Exercise

Learn technologies to solve skin problems. – Source for product information

Put your list of products in the comments section below.

TAGS:30 days


  1. Endlex Victor Okechukwu

    Thanks Perry,
    It’s another astonishing lesson, knowing about skin and how it grows, where a cosmetic chemist will concentrate,

    Thanks for widening my knowledge in cosmetics industry.

    Endlex Victor Okechukwu

  2. Yabil Coulibaly

    Thanks Mr Romanowski,

    Everything I have heard from you until now is helpful and refreshing.
    Looking forward to learn more from you.

  3. Jessica

    Good day Perry, I have used body creams that doesn’t​ contain hydroquinone claim to lighten the skin and they have worked.. so if only hydroquinone lightens how come it works..p.s cream contains claims ingredients like sambucus Nigra flower extract, tilia tomentosa extract, glycyrrhiza glabra root extract..

    1. Perry Romanowski

      Only Hydroquinone has scientific proof that it works. Other things might work and anectodally people might believe they do. I was just stating what has been proven to work.

  4. BROMS

    As you said that it is only the Hudroquinone that really works in the lightning of the skin, but it is banned in some most of the coutries and is know that it is cancerous, is there any way that this ingredient can be used in a more docile manner by mixing with some other ingredients in order to get the same results but safe?

    1. Perry Romanowski

      You need to find out what the local regulations are. Hydroquinone is not completely banned. In the EU it is only available via prescription. In the US it is limited to OTC products. You can use lower amounts but that makes it work less effectively.

  5. yogendra singh

    very informative session,thanks sir.sir best book you suggest for me for natural organic product formulation

    1. Perry Romanowski

      Interesting. The way the monograph works for acne products is that the researchers will have to show much more data to get it included as a viable active which formulators could use.

  6. Bilson Shukla

    Thank you!
    Hi, Could you please share some ppt slides for personal care market in global and in India and also personal care ingredients use mainly Silicones. I would be delighted and thankful if you please share data for personal care market at my mail id at
    Thank you
    Dr. Bilson Shukla

      1. Bilson Shukla

        Thank you Perry
        I tried to register in Forum but its telling that please enter correct code and i could not able to see any code. Could you plaese help me out for registration in the forum. Thanks in advance.
        Kind Regards,
        Dr. Bilson Shukla

        1. Perry Romanowski

          All done – see your email for a note.

  7. Bilson Shukla

    Thank you Sir….Its really valuable…I am a Polymer Chemist but quite good learning in the case of biology of skin…Learning is always good…Thank you…
    Could you please provide the link of cosmetic science forum.
    Thank you!
    Dr. Bilson Shukla

  8. Joseph Vernice

    I am a seasoned cosmetic chemist with over 30 years of experience. I find your podcast series very valuable for new chemists as well as a great review for experienced chemists. Bravo for putting this together! Thank you!!!

    1. Perry Romanowski

      Thanks Joseph!

      1. Anita Yebide

        Thank you so much sir for this wealth of information. But my question is if cosmetic products cannot penetrate the stratum corneum, how then does all these skin lightening creams produce a visible result. The main claim of skin lighteners is that it reduces melanin and melanin is produced by melanocytes in the stratum basal. I would really appreciate your take on this

        1. Perry Romanowski

          Hello Anita – Well, for the most part skin lighteners don’t work. The only one proven to work is Hydroquinone and that ingredient is able to penetrate deep enough in the skin to affect melanin production.

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