How do colour-changing lipsticks and blushes work? The science

Red 21 Red 27 colour changing

Have you seen colour-changing lipsticks and blushes online? A lot of these claim to “adjust” to your skin’s pH to give a personalised shade… but is it just a gimmick? Here’s the chemistry behind these products. Colour-changing ingredients Red 27 Most colour-changing products – whether lipsticks or blushes – contain an ingredient called Red 27, also listed as CI 45410 …

Read more

Ultimate Guide to Drug Retinoids

drug retinoids thumbnail

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 …

Read more

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 …

Read more

Is Retinol a Scam? The Science

Retinol Scam thumbnail

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, …

Read more

DIY sunscreen test? Reacting to Style Theorists’ video

style theorists sunscreen reaction video

The Style Theorists recently did a video where they tried to test sunscreen “scientifically”, including… in a tanning bed. A lot of people sent it to me, so I filmed a video reacting to it! You can watch it here. Some of the topics covered: People should wear more sunscreen Sunscreen absorbing into blood Coral reefs and science by press …

Read more

Sunscreen myths in the media

myths in sunscreen articles

It’s sunscreen season, and as you’d expect, there are lots of sunscreen articles coming out, full of common myths.  I’ve debunked a lot of myths about sunscreens before – sunscreens are toxic, you can make your own sunscreen – but this time I’m going to focus on incorrect advice from trusted media sources. These myths tend to be a bit …

Read more

Are plastics and petrochemical products bad for the environment?

plastic eco beauty

More beauty brands are talking about sustainability, but there’s a lot of greenwashing. In the last installment we talked about the impact of producing natural ingredients and after they go into the environment, as well as organic versus conventional farming. In this part, Jen of The Eco Well and I are breaking down myths about synthetic ingredients made from petroleum …

Read more