Formula Critique

What do you think of this formula for a rich moisturizer. Is there anything you would add or change?

Aqua 61.15000
Glycerin 4.00000
EDTA 0.20000
Hyaluronic acid 0.50000
Isopropyl myristate 3.00000
Myristal myristate 3.00000
Dimethicone 3.00000
marula 1.00000
Camellia oil 2.00000
Capric/capryllic triglyceride 4.00000
Cetearyl alcohol/ceteareth-20 4.00000
Sodium acrylate/sodium acryloyldimethyl taurate copolymer, C15-19 alkane, polyglyceryl-6 laurate, polyglycerin-6 (gel emulsifier) 2.00000
Allantoin 0.30000
Niacinamide 4.00000
Saccharide Isomerate 3.00000
Panthenol 1.00000
Cica plant extract 0.10000
Tocopherol 0.10000
Ceramide blend 2.00000
Phenoxyethanol, capryl glycol, sorbic acid (preservative) 1.25000

Xanthan gum 0.20000

Comments

  • MarkBroussardMarkBroussard Member, Professional Chemist
    Yes, Marula Oil is very high in Oleic Acid, so I would change it to a high Linoleic Acid profile oil.  Also, you don't seem to have included a film former for TEWL reduction.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • @MarkBroussard

    Thanks, I wanted a richer feel and picked oil with high oleic acid content for that purpose.

    What is a good film-former ingredient you would recommend?

    I am mostly worried about the texture visually. While the cream is not sticky and has great slip when applied, visually it looks like white glue due to some air bubbles in it, high gloss and high viscosity. I want a slightly softer, lower viscosity, creamier looking product. What do you think give is the high gloss/high viscosity glue like look and how can I correct it? I suspect the gel emulsifier is creating this issue but not sure.

    Thanks, 
  • @mehdilazrak91I would try playing around with both the gel emulsifier and the Cetearyl alcohol/ceteareth-20 to influence both the texture and the viscosity. Adding fatty alcohols like cetearyl alcohol or cetyl alcohol can give it a more 'creamy' and opaque appearance and feel.
    Cosmetic Product Development
    Sussex Research Laboratories Inc.
    www.sussex-research.com
  • MarkBroussardMarkBroussard Member, Professional Chemist
    @mehrzadkia

    Dura Quench from Croda.  You can purchase small quantities from MakingCosmetics.com

    Cetyl Alcohol (and) Isostearyl Isostearate (and) Potassium Cetyl Phosphate (and) Cetyl Stearate (and) Stearic Acid
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • I don’t understand why film former is required here. There’s dimethicone, that reduces TEWL, in formula and a gelling polymer (probably it’s too high) that acts as a film former (acrylate based polymer) and there are ceramides.
  • ngarayeva001ngarayeva001 Member
    edited April 16
    And panthenol too (I would reduce, it can contribute to tackiness). 
    I think it’s the polymeric emulsifiers that compromises the texture. Try to reduce to 0.5%.
    Also, this preservative might have negative impact on the texture.
    Regarding air bubbles, what are you using to emulsify your product? What is the size of the batch?
  • MarkBroussardMarkBroussard Member, Professional Chemist
    I am mostly worried about the texture visually. While the cream is not sticky and has great slip when applied, visually it looks like white glue due to some air bubbles in it, high gloss and high viscosity. I want a slightly softer, lower viscosity, creamier looking product. What do you think give is the high gloss/high viscosity glue like look and how can I correct it? I suspect the gel emulsifier is creating this issue but not sure.

    Thanks, 

    You might want to cut down on the Myristyl Myristate as it tends to increase viscosity, but also give a high gloss to creams.  The skin sensorial, however, is excellent.  Try 1.5% MM and that will probably help with this.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • 2% of Sepilife Nude (aka GelMaker Nat) is enough to make a very viscous emulsion without addition of thickeners. Your emulsifier contains Cetearyl Alcohol and you have Myristyl myristate.  Make your formula without the gel maker and then start adding it (start from 0.5%) until you reach desirable  viscosity.
  • em88em88 Member
    To me, it looks like you added in your formula everything you had in front of you. 
    Have you actually tried this formulation?
    Why did you add xanthan gum when you have already 2% of gel emulsifier?
    Not sure if you really need Cetearyl alcohol/ceteareth-20, the gel emulsifier should be enough. 
  • MarkBroussardMarkBroussard Member, Professional Chemist
    It's a nice combination of moisturizers, humectants, emollients, but could use an occlusive.  I agree with @em88 ... I would trash the two chosen emulsifiers and go with something that forms a lamellar structure.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • DoreenDoreen Member
    Dura Quench from Croda. You can purchase small quantities from MakingCosmetics.com

    Cetyl Alcohol (and) Isostearyl Isostearate (and) Potassium Cetyl Phosphate (and) Cetyl Stearate (and) Stearic Acid
    I see it contains isostearyl isostearate, George Deckner from UL Prospector also recommends this, for reducing TEWL. 
    (Emollients (5-15%): historically most hand and body lotion formulations used Petrolatum due to its ability to reduce TEWL or skin moisture loss. I recommend using emollients which can positively impact the crystallinity of epidermal lipids and have a good skin feel. These include:
    • Isopropyl Isostearate for improved hydration
    • Isostearyl Isostearate for reduced TEWL
    • C12-13 Lactate for stimulating epidermal lipids production and hydration )
    Source (also contains more tips regarding moisturizers by George Deckner).
  • Thanks all.

    @MarkBroussard if I go with lamellar emulsifier such as Montanov, would I still need Xanthan gum?
  • MarkBroussardMarkBroussard Member, Professional Chemist
    Yes, the Montanov series create thin emulsions, so you're going to need Xanthan and Cetyl, Stearoyl, or Cetearyl Alcohol (3%) to get decent viscosity.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • I made it again without the gel emulsifier. All that weird viscosity is gone so it came a 100% from the gel emulsifier. However, now the product is too runny more like a lotion than a cream so I will be reintroducing the gel emulsifier at lower concentration.

    @MarkBroussard I am planning to also try a version with Montanov lamellar emulsifier. What % of lamellar emulsifier would you recommend and should I use Montanov or you got a better recommendation for lamellar emulsifier?
  • Increase Myristyl myristate to 5-6% and add 0.5% of Gel maker (it will significantly improve the texture). Alternatively you can replace Myristyl myristate with Cetyl Alcohol (4%) or combine them (for rich creamy texture 3% Cetyl Alcohol, 2% myristyl myristate).
  • @ngarayeva001 if I increase Myristyl Myristate to 5-6% and add 0.5% of Gel maker, should I remove Cetearath-20/Cetearyl Alcohol and Xanthan gum?

  • MarkBroussardMarkBroussard Member, Professional Chemist
    edited April 18
    @mehdilazrak91:

    I would use Montanov 82 (Cetearyl Alcohol + Coco-Glucoside) at 3% to 4% ... you'll need to add an additional 2% Cetearyl Alcohol to thicken it up.  That, plus the Myristyl Myristate should give you a nice texture.  You'll want to leave in the Xanthan Gum.

    Yes, I would leave out the Ceteareth-20 and Gel Emulsifier altogether. 
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

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