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why is it bad to use sa and bp together?

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it isn't bad, its wonderful, sa unclogs pores, bp kills existing acne, if you dont have one or the other you will most likely be unsuccessful.

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purely because it can be over-irritating. the more you irritate your skin, the less likely the meds can effectively work...see here from Colombia University's Go Ask Alice!: http://www.goaskalice.columbia.edu/1819.html or check below


Use of salicylic acid with certain other products may also cause severe skin irritation, so avoid the following unless directed by a health care professional:

-abrasive soaps and cleansers

-skin products that contain alcohol

-other acne medications, including benzoyl peroxide, resorcinol, sulfur, or tretinoin

-drying cosmetics or soap

-medicated cosmetics

-other skin medications applied topically

Let's look at the other option you mentioned in your question: benzoyl peroxide...Also steer clear of the following, unless your provider tells you otherwise:

-skin products with peeling agents, such as resorcinol, salicylic acid, sulfur, or tretinoin

-irritating hair products, such as hair removers

-skin products that cause sensitivity to the sun (ones containing lime or spices)

-skin products that have a large amount of alcohol, such as astringents, shaving creams, or after-shave lotions

-abrasive and drying skin products


but you also have to consider the strength of each. i guess that why some people say the botchla method (BP wash + SA wash) works...they're washes = low percentage of BP and SA....

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