If you happen to wander onto a skincare website or browse through Sephora, you may wish you’d paid a little more attention in your high-school statistics class. One product after another is accompanied by a list of numbers, usually percentages, intended to convey their efficacy. Interpreting them may require an advanced degree.
Estée Lauder Advanced Night Repair tells us that 91 percent of 535 women who used the serum for three weeks reported that their “skin looks more rested,” and 89 percent attest that it also feels firmer. Caudalie rattles off figures for its Vinoperfect serum: 65 people said their dark spots were “visibly reduced by 63% after 1 bottle.” Medik8’s Super C Ferulic Serum offers a “brighter more even complexion” in seven days, with 93 percent of users claiming it “worked faster than any vitamin C product they’d tried.”
