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I never understood why products refer to "2.5%" benzoyl peroxide vs. "10%".

What's the difference? It's a percentage of *what* exactly? And if I mix

other stuff in with 10% BP, can't I produce a 2.5% solution/cream on my

own? I figure it's probably a percentage of total mass?

Steve

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i believe it's how much it's diluted. and yeah you can make your own 2,5% out if 10%. lots of hassle though.

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The 10% stuff just contains a higher concentration of benzoyl peroxide (4x more), and so is MUCH more drying! I suppose you could "dilute" your 10% creme with a moisturizer or something so it wouldn't be as strong, though it'd be easier to just buy some 2.5%. Neutrogena's on the spot acne treatment has this concentration, though I buy mine cheap at my pharmacy's OTC section. HTH!

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Why is it a hassle to dilute 10% BP in order to make 2.5%? All I would do

is add something like aloe vera gel to it and shake it all up. Where's the

hassle?

Why not by Neutrogena's On-The-Spot? Because it costs a whole lot

for a whole little. You can get 10% BP much more cheaply, and you get

lots more generally.

Steve

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Yeah, Neutrogena's on the spot treatment is kinda pricey for its size, I was just using it as an example of a 2.5% BP product. :D . Thats why I get generic BP in my pharmacy's OTC section, it is about $4 for a good sized 2 oz. (51g) tube and comes in 2.5, 5, and 10%. Maybe you could check your pharmacy for some cheap BP too, depending on your health plan. But heck, I suppose you could just use less of the 10% cream and add some moisturizer, though if you're gonna mix 'em in a bottle I don't know how a gel and cream would go together. Good luck, anyhow!

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Yeah. I bought 10% the last time because of that. $4 per ounce versus $6 per .75 ounce.

I looked up Rite-Aid's price once for having them make up some 2.5% bp. The price was even more.

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