click here to see a list and offer up your own!) A few of your suggestions have been written about in the past, and a few might have been written about before! Here are a few for now...
A few of you have asked for information on cosmeceuticals. I did write a series on this topic last year - click here for all the posts under the label "cosmeceutical" - so can you be more specific about what you want to see? Do you want more formulations? More ideas on how to use the ingredients? (I'm going to turn this section into a list with information on things like niacinamide and ferulic acid, as well as vitamins!)
Click here for the new cosmeceuticals section of the blog!
section on skin chemistry to get a few ideas on what kinds of ingredients your aging, rosacea or acne prone skin might like! (And yes, these products will be suitable for men and women!)
There were a few questions about making our own emulsifiers. I'm guessing that you mean the HLB system type emulsifiers? If so, I've written about them extensively on the blog in the past. (Click here for all the HLB posts or click here to start the series (hit "newer post" to see the next one in the series)). After taking a look at those, can you advise what more I can offer in that area?
MMU! I have posts on making your own base, turning a blush into a foundation, creating a base from scratch (part 1 and part 2), creating a translucent base, creating an opaque base, and so on. The mineral make-up series starts here - mineral make-up: a primer - and just click "newer post" to see the next entry in the series.
How to know when to add an ingredient to your product? Click here!
Some ideas for substituting when you don't have the ingredient I suggest? Click here for the posts I wrote on substituting! (As for your specific question about what you could substitute for cetrimonium chloride. Nothing. Nothing really replicates what it offers to you hair. You could use Incroquat CR for detangling and softening, but nothing really compares to what cetrimonium chloride brings to your product!) My goal with this entire blog is that my recipes are generic enough to allow you to make loads of changes, and that you can learn enough from the ingredient posts to figure out how to make substitutions.
I really appreciate your help on finding topics for the blog! I'm never sure if I should re-visit a topic or if I should start from scratch, and you've offered some interesting ideas! If you take a look at the links and still don't find the information you want, write to me (comment or email) and let me know!
As for the new ideas, give me a bit and I'll get to making more facial products, like eye creams and sera. Unfortunately, I can't test most of them on me as my skin really doesn't like oils, so I'll have to find some willing guinea pigs in my friends, co-workers, and family! In the meantime, here's the link to 85 facial product recipes and ingredients that might interest you!
And thanks for the idea to do some things on surfactants, Tara! You know that's one of my favourite topics!
As for the picture of the Mario mushroom, it's from a local restaurant - Seven Sushi - and the chef has been having fun with the garnishes! I just thought it was awesome!