Hi!
First of all I need to apologize for my poor english, cause I'm scandinavian.
But I really need help with some ingredients when it comes to powders, foundations and acne. I have adult acne cause of my hormones since many years...
1) First of all I wonder which powders you guys use, and how they work, and what they contain?
2) Then I wonder if it's true that cornstarch (B.E. Mineral veil), rice starch (Youngblood) is comedogenic? And what about talc, silica, mica, kaolin clay, and other common ingredients, which is worst/best?
3) I also wonder about your foundations; I use Everyday minerals matte foundation, but have heard that the lauroyl lysine is unsafe for acne prone skin - is there any alternative that you like? I think I break out from titanium dioxide actually...i had that experience from some sunscreens and mineral makeups - strange! But, what do you use and what have you tried?
Really need help, my face is always "bumpy" and I need to change something!!
Thanks a lot!!!
Hi Emma
I am not sure if I can help much but can share my personal experience.
I have used powder makeup for over 10 years but in the past couple of years my skin has become more acne prone and I think the powder mineral makeup is contributing to it. The one I use doesn't contain corn starch or rice starch, only mica, kaolin and titanium dioxide. I am not sure which clogs my pores but I have read online several views that mica can be pore clogging. I find that most sunscreens break me out, so possibly the titanium dioxide is a problem. I am not sure.
My theory with powder mineral makeup is that because the particles are so small they get into the pores more easily where they soak up oil and clogs your pores.
I've been using LilyLolo mineral makeup for seven years, and I don't think I'll be using anything else any time soon! 
I don't have it on hand now, so can't tell you the ingredients right away, but I know it contains mica (which is for the colour I think). Just have a quick look at their website: [Removed]
I definitely recommend this brand! (and they do beautiful blushers and eyeshadows too!
I would stay away from any sort of mineral makeup products, as acne-prone skin is often reactive. Despite being "natural" products, they contain irritants that affect sensitive skin.
I would go for a liquid concealer and liquid foundation, applied with a brush. Regardless, good luck!
I had horrible luck with powders because as one commenter said they contain irritants- but... lets be real what cosmetic product doesn't! All i can comment about is the Talc- which is like a crushed up rock..../ Anyways, talc back in the day and still today is used in baby powder among many other products as a base. And many are unaware that when applying baby powder to oneself or young infant it should be applied from the hand and not throw on the skin straight from the container. because if inhaled it can be very harmful to ones body because it contains carcinogens (is that how you spell it?) But many forget- you dont have to inhale it for it to be harmful to ones body- the human bodies biggest and most important organ is the skin. The skin absorbs usually what you put on it- so by applying something that contains talc to your body can do as much damage as inhaling it. I did a paper at Uni on the Food, Drug, and Cosmetic Act and talc in cosmetics is Not regulated. And be aware many drug store products do use talc in their products as a cheap base additive- but also is found in many high street brands so dont be fooled. Anyways, i cant tell you what products are good and which are not- thats for a specialist. Ask your dr. or a derm they may know best on which products are safe to use.