Hey Chloe,
That's what I started with as well. 12.5 from MUAC. Is that where you ordered yours? I then moved to 15% Skin Obsession, which their peels have a lower ph and are a bit stronger for the percentage, so it might be closer to an 18% from MUAC. (I'm guessing, give or take).
Do you use any actives right now? Retinoids or Hydroxys? Or any other home peels? (glycolic, lactic or salicylic acid).
I believe it definitely helps to kind of prepare your skin prior, and especially when doing home peels, on your own.
That said, I've done tons of reading on this on various forums, and there have been people who have not prepped their skin ahead of time and they have been fine, so long as they start at a low percentage.
I am now using 20%, two layers, and have done some spot treatments at 25%. I've been doing combo peels, and in fact when I did my first TCA I did it as a combo with a glycolic first. But unless you have been using peels already, I don't think I would recommend that. I had been doing glycolic peels for weeks first, so I felt brave enough.
Through trial and error as well as reading other's experiences, I've learned a few things:
Wash your face with a mild cleanser, and then after patting dry do give it a good 20 minutes to air dry. Then prep your skin. I started using that blue stuff that MUAC sells, but moved on from that to alcohol. When I was still not getting a good frost, I then moved on to straight acetone, which is what they used on me at my doctor's office, and is very common with people who do a lot of home tca peels. I know it sounds insane, but it works, and amazingly doesn't feel dry after the peel. I use a cotton ball and really scrub the skin to make sure to get absolutely all traces of anything, including oils, off.
Let that dry a couple minutes.
I use vaseline and I put some in my eyebrows, to keep any from dripping into my eyes. I then put some on right under my nose, almost inside it. Then some on my lips.
Wear gloves! If you get this on your fingers, once it starts to peel it feels awful. For days you feel like you have glue stuck on the ends. Then it peels and your fingers feel slippery without that layer of skin! No pain, just not a nice feeling and hard to type. Anyway...
What I have found works best for me, is I use those little tiny measuring cups that come attached to the tops of otc cold medicines. They are the perfect size. I pour a little bit of the TCA in there, and I use gauze pads from the drug store. I think they are 2x3 inches? Around that size. I fold one over, and I hold on to the one end and dip the other in the cup, then I press it against the side to squeeze the extra out. I go from left to right across my face. I now do under my eyes, but I did not at first (I also use RA there so they were prepped).
It should not be so wet that it stays wet looking for long. I had some drip down the side of my face and I did not know it and it left red drip marks for weeks.
Keep a blow dryer right there and plugged in and on cold setting. I don't feel much pain from TCA, as glycolic or SA are worse, IMO. But you may really feel it. It is not so much pain, as itching so bad it almost hurts.
TCA self neutralizes. You do not need to wash it off, but it will not start to neutralize for I think 5-8 minutes or so. So if you are really uncomfortable and are nervous, it will slow it down to wash it off early, but try to keep it on at least a minute or two (the pain/itching does lessen with time). If you just can't though, then wash it off for sure! However, if you are fine, then you can just keep it on and not remove it til you next wash your face next day. It won't hurt to rinse if you want to, but I don't. Most people do but I think they think they need to to neutralize it, because some instructions tell you that. I know it is not necessary though, and my doctor did not with me. I just immediately apply moisturizer after ten minutes or so. If you are doing more than one layer, then you would add the second after five minutes or so.
If you have frosted in any areas, don't put more on those particular areas. I have done that but not my first peels. You really should just do one layer the first time. You may be disappointed if you don't think you peeled much and never frost, but I promise you that it is still working. It is still speeding up cel turnover and you will get a good peel still!
Some people like to "starve" their face and put no moisturizer on it. They think it peels faster. From my experience that was misery. MISERY. Once your face starts to harden (like a layer of glue), it can crack. Mistake number two I made was my face was cracking so bad and I opened my mouth too wide (meaning more than a slit, as it was practically glued shut), and it cracked and gave the same effect as if I had peeled my skin with my fingers: the dreaded red marks again, for weeks.
Keep moisturized with bland moisturizer. I use a moisturizer and then either Aquafor or emu oil over that. I keep it goods and moisturized all the time. It will still harden like that glue look/feel. Not as bad as without moisture though.
Sorry this is so long. It is definitely a process, and they don't tell you much in the instructions.
I can't even tell you what to expect at all, regarding peeling or frosting or if you will have it bad with a 12.5 or not. Some people really peel and others are saying they had a very mild reaction. If that is the case, then you can consider it a good "prep" for your next peel and maybe do two layers or add a Jessner first (helps the peel penetrate better, and makes it a much stronger peel).
I think so much of this you learn as you go, but I would definitely recommend doing a series. Since I am doing the stronger peels I wait 6 weeks. The weaker ones I was doing 3-4 weeks. Really until you know your skin is all healed and then give it some time after that. I think some people do them too often.
If you have any questions let me know or if you want to email me about anything, please do!
jaclassics@aol.com. Or PM, whatever.
Oh, as far as results. My best results have been on my hands and my chest, because they were way more damaged, and I didn't really use anything on them religiously like I had already been doing my face.
My face I can tell you that the texture GREATLY improved (and this after 25 years using RA, and a few years using AHA creams). Also some fine lines have disappeared and I definitely have some tightening. Not much, but I can tell for absolute positive, without a doubt. But this took a few peels...
Also has helped pigmentation and evened out my uneven skin tone. That was quite noticeable after one or two peels.
My most prized improvement though are some cracks I had outside of my mouth, that I developed at age 28 from poor nutrition. Herman Munster has these for point of reference. ;) I have never used anything on them. No RA, no aha...was always afraid. But I braved it and I have done 3 TCAs on them, including the last one was a "spot" at 25% (no jessner or glycolic first).
I can tell you that those horrible cracks are now a good 40% shallower and shorter in length. It is like a miracle. Oh, I have also been using copper peptides on them (and I do use that now after my peels, but only started that two peels ago). Even if those cracks don't get any better than they are now, they have come a long way and I am thrilled. They are very embarassing. Straight out the corners and run down diagonally. (they are not marionette, they are actually cracks, like maybe smokers lines on crack.;) Deeper and longer).
Sorry for all the typos I probably have up there.
I think I better make a copy of this post, as I'm not sure it will all load. LOL