Comments on: 3 Surprising Combinations of Ingredients You Might Not Want in Your Skin Care

By: Friendly Fridays Q&A: When is the Best Time to Use Each Skin Care Ingredient? « FutureDerm.com

Fri, 27 May 2011 22:58:13 +0000

[...] that you do not want to use ingredients together that can inactivate each other. For instance, retinoids have an optimal pH of 5.5-6.0, while alpha hydroxy acids work best at a pH of 3.0-4.0. If you use them together, it is likely [...]

By: Obadina Ayodeji M

Obadina Ayodeji M — Sat, 16 Apr 2011 19:01:25 +0000

What if i use Neutrogena pore refining Aha&Bha cleanser with Neutrogena healthy skin antiwrinkle retinol spf 15 cream.

By: Di

Di — Sat, 13 Mar 2010 21:43:08 +0000

I am wondering if I can mix L-ascorbic acid and arbutin, kojic acid, nicinamide and other skin lightening actives. Would they increase each others effects or some how cancel the effect?

By: Product Review: Philosophy The Miracle Worker Miraculous Anti-Aging Retinol Pads and Solution « FutureDerm.com

Mon, 18 Jan 2010 00:00:33 +0000

[...] and that is the product’s inclusion of vitamin C in the product. As I have discussed in a previous post, I don’t typically choose products with vitamins A and C together, as it has been [...]

By: Ruben

Ruben — Wed, 09 Dec 2009 12:10:09 +0000

PS: My finalproject is entiteled ‘Cosmetic actives – Technical, customer and markting research’ When finished I’ll send you a copy

By: Ruben

Ruben — Wed, 09 Dec 2009 12:08:32 +0000

I’m studying cosmetic science and my professor said that when we make an emulsion containing AHA/BHA/Retinol or any other ingredient which require a higher pH then the AHA/BHA we can simply fix that by creating an O/W/O/W emulsion, better known as a MLE (Multipule Layer Emulsion). We then do the AHA/BHA in one O/W emulsion with the correct pH and add another O/W emulsion with the retinol to it! This way you can easily combine them both without harming the pH effectiness.

Also many cosmetic products containing VIT A are just in it to help the Oils from oxidation during the heating up process. example: we make an Night Cream O/W or W/O and insert retinyl palmitate to the oil phase to protect the oil when it’s being warmed up till 70° or so. It has no real benefits for the skin just to help prevent the oil from Oxidation, it’s usually then in products with an 0,5% concentration, ofcourse this doesn’t go for retinol since that’s active that you add in the Temperature sensitive fase. Same goes for Tocopherol oil which is just inserted to protect the oil, it’s Tocopherol acetate that has benefits for the skin.

By: Susan

Susan — Thu, 03 Dec 2009 20:10:08 +0000

Can you apply a moisture cream after a Vit A cream to help minimize irritation and dryness? If so, how much after should you apply.

Thank you

By: joseph

joseph — Sat, 10 Oct 2009 22:48:50 +0000

FANTASTIC article! i’ve been a skincare junky for the past decade and the past few years i’ve really become interested in the formulation process. this article shows me some of the things cosmetic chemists have to take into consideration to create quality, effective formulations!! thank you so much!

By: FutureDerm.com » The 6 Most Shocking Facts I’ve Learned as a Beauty Blogger

Thu, 08 Oct 2009 02:40:59 +0000

[...] there, mixing certain ingredients together can alter the effectiveness of each via the pH (e.g., retinoids and alpha hydroxy acids), conflicting effects (e.g., niacinamide and sirtuins), or even the texture of each (in general, [...]

By: Rose

Rose — Mon, 21 Sep 2009 09:46:32 +0000

Hi, thanks for the information! I was wondering, if I use a cleanser with salicylic acid before using retinol, will that have adverse effects? Also, does AHA/BHA working best at different pH levels than retinoids mean that any of the products actually change the pH level? If not, how would using the products together make the situation worse (i.e., make the pH less favorable to one of the products) than it already is?
Thanks!