47 minutes ago, Control Panel said:

Benzoyl peroxide is in the peroxide family, so it's not stable in the presence of light. Keep it in a cool, dark place. If you do so it should last up to or longer than its expiration date.

I was wondering because I've been using the same one for about 7 months now and recently I have started breaking out again.

On 11/17/2016 at 6:07 PM, Control Panel said:

You can apply some of it to colored fabric to see if bleaching occurs. If it does, there is still some active benzoyl peroxide.

Thank you.