Ultimate Guide to Drug Retinoids

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Drug retinoids – tretinoin, adapalene, tazarotene and trifarotene – are some of the most powerful ingredients in skincare. They can help with issues like acne, uneven texture and hyperpigmentation. But what are the differences between them? Here’s the guide for you! My PhD is in medicinal chemistry, so I’m going to be diving into the differences at a drug structure …

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Vitamin C doesn’t work? Debunking Science Vs Skin Care Podcast

Science Vs Skincare Podcast

The Science Vs podcast episode on Skin Care: Is Anti-Aging a Scam? in part inspired my recent post on whether retinol in cosmetic skincare products worked. I’ve had some questions about some of the other parts of the podcast, especially about vitamin C and whether it actually penetrates skin. As I’ve discussed before, vitamin C in L-ascorbic acid form is …

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Is Retinol a Scam? The Science

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If there’s one skincare ingredient that works, it’s retinol. Pretty much everyone agrees – whatever skin concern you have, it’s one of your best bets. But is it all a scam? Let’s dive into the science behind retinol, and the bigger question of why skincare science looks so different from what academic scientists are used to. The video is here, …

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Is Your Sunscreen Killing Coral Reefs? The Science

Is Your Sunscreen Killing Coral? The Science (with Video)

You might have seen that Hawaii has banned certain sunscreens that have been linked to coral bleaching. In particular, it’s the organic “chemical” sunscreen ingredients oxybenzone and octinoxate that have been banned. It sounds like a great victory for the environment, right? But if you search a little past the headlines, you’ll find that there are actually a lot of …

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Fact-check: What is micellar water and how does it work? An Update

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Over the past two years, my post on the chemistry of micellar water with dodgy photographed scrawlings has become one of the most popular, so I thought it was high time to update it with nicer drawings and finetune the explanation of the science. This also comes in video form – check it out here! There are tons of micellar …

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Why Vitamin C Can Stain Your Skin (and How to Avoid It!)

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Vitamin C is one of the few skincare ingredients with a decent amount of independent research to back up its properties, like its brightening and anti-wrinkle benefits. Related Post: Vitamin C – what does it do for your skin? But those of you who are vitamin C enthusiasts may have noticed that with some vitamin C serums that contain ascorbic acid, …

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Easy (5 Minute) DIY Vitamin C Serum Recipe

I’ve mentioned my super-easy DIY vitamin C serum a few times before on social media, and some of you have been asking me for the recipe… but I’ve been so distracted with other things I never got around to posting it until now. I’m sorry! Please forgive me. I hope the results make up for my tardiness! Here’s the video …

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