I've tried absolutely everything to cure or at least control my acne in the last 10 years. Prescriptions, OTC products, expensive OTC products, acutane, even UT (Don't ask why I tried that before this.) ACV has worked extremely well for me in the last two weeks. It took some time to really see results, but I would rather have delayed, sustainable results, than some over the night cure that isn't really good for my skin in the long run.
It works, because it's a natural antiseptic, and when diluted with a little water, it's supposed to balance the skin's pH. After years of various types of txs, it makes sense that my skin's acid mantle is all out of whack, so with repeated use I believe this product is helping to restore my skin's natural durability.
I use it twice a day, morning and night, after washing my face, as a toner. I started by diluting it 1:4 vinegar to water. I'm currently using a 1:3 ratio, and I might even get closer to 1:2 with the next batch I make, at least for spot treatment. I apply it with a cotton ball, let it dry, and apply my regular moisturizer over it, because it can dry your skin out. I haven't had any cystic acne since using this, and any new pimples either dry out or come out within a day or two. I've also noticed that it has helped with my scarring. This is huge for me, and acne products and product for scarring are rarely one in the same.
I also maintain a healthy vegan diet. Cutting out gluten has made a big difference for me. I'm running out of room to write, but please look in to that!! I take a digestive enzyme, EFA oil with DHA, and a calcium/mag/zinc supplement. I've been getting microderms to help with scarring. I try to get at least 10 minutes of sun on my face most mornings. I use Dr. Bronner's 18-in-1 soap, because it's one of the most natural soaps I've found. But even with all of this, ACV has made the most noticeable difference in my skin. Definitely worth trying. Give it some time. Go