Oversubscribed: Exponent Beauty Founder Liz Whitman
The World's First Podcast with Erin & Sara Foster
How Long Does a Serum Last?
The average length of time that somebody expects to use like a one-ounce serum dropper bottle is usually about three to four months. The active ingredients degrade so fast that you're losing about half in a six-week period. So for the majority of the time that you intend to use it, and it's really just not delivering the benefit that it needs to. And that's of course just assuming it started out with enough in there to actually do anything for your face to begin with.
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