I can get a 2.5% benzoyl peroxide. Can I use a higher concentration?
2.5% is best. However, anything up to 5% should most likely be fine, albeit more drying and no more effective. Avoid 10% preparations which will over dry. One exception when dealing with pimples on the back. The skin in this area is tough and may withstand 10% nicely. If you can find a 10% much cheaper, you may want to try it on the back. It will not be more effective than a 2.5% solution, but may save you money. So why not simply use less of a 10% solution? Through trial and error I have found this does not work. I do not know exactly why using more of a 2.5% solution works better. My guess would be that when you use more of the product, there is more available to be absorbed into the skin.
2.5% is best. However, anything up to 5% should most likely be fine, albeit more drying and no more effective. Avoid 10% preparations which will over dry. One exception is when dealing with pimples on the back. The skin in this area is tough and may withstand 10% nicely. If you can find a 10% much cheaper, feel free to try it on the back. So why not simply use less of a 10% solution? Through trial and error I have found this does not work. I do not know exactly why using more of a 2.5% solution works better. My educated guess would be that when you use more of the product, there is more available to be absorbed into the skin.
