Reader questions

What is glycerin, and why is it used in skin care products?

Let's take a closer look at this popular ingredient and ask my dad what concentration is included in a moisturizer.

Ever since I started blogging about skin care, I’ve grown accustomed to seeing the same ingredients pop up over and over again. One of them is glycerin. A few months ago, a reader contacted me with an intriguing question: What’s the typical concentration of glycerin that would be included in a rich facial moisturizer? In this post, we’ll ask my dad that very question and give this ingredient some overdue attention.

Why you should probably buy name-brand sunscreen

If you find a sunscreen that works for you (hallelujah!), it's probably best to stick with it rather than trying a slightly cheaper version.

I received a question from a reader the other day, and it got me thinking about when it makes sense to save or splurge on skincare products. Sara left a comment on the Neutrogena vs. Trader Joe’s Sunscreen Stick Comparison blog post, saying that she had tried Trader Joe’s sunscreen stick as a less expensive alternative to her normal go-to sunscreen stick from ThinkBaby—but unfortunately, the TJ’s version wasn’t able to protect her daughter from sunburn. For reference,…

Save or Splurge? The Ordinary EUK 134 vs. NIOD Superoxide Dismutase Saccharide Mist

Which DECIEM option should you go with: The Ordinary's EUK 134 or NIOD's superoxide dismutase saccharide mist?

Despite all the recent-ish drama surrounding the future of The Ordinary, DECIEM is taking the world by storm. Here in NYC, there are now seven locations—I still remember there were only two stores around a half year ago (~March or April), when I first visited the location in SoHo. Here’s a drive-by picture of the new Upper West Side location: