I’ve talked about how Olaplex and other bond builders probably don’t act at broken disulfide bonds before – they do work to make hair feel and behave like it has more bonds, but they likely do this via other mechanisms, such as adding more hydrogen and ionic bonds. But there’s an independent study titled “Bleached Hair as Standard Template to …
AI-generated science content is super prone to factual errors. Here’s how to spot it… Why spot AI slop? Lots of typos and grammatical errors used to signal that something wasn’t checked carefully. Now, it’s AI slop signs. LLM-based chatbots (ChatGPT, Claude, Gemini) are prone to particular accuracy issues, and it’s unclear if these can be fixed People tend to believe …
Lazy AI-generated content is everywhere now. Unfortunately, AI chatbots like ChatGPT, Claude and Gemini aren’t reliable for factual content, especially science content. AI chatbots don’t “know things” AI chatbots don’t simply report information from a database, and they haven’t “learned all of human knowledge”. This is a common misconception that’s perpetuated by AI companies – when people think AI chatbots …
There’s been a huge increase in social media posts about how: “The sun doesn’t cause skin cancer” “Sunscreen doesn’t prevent skin cancer” “Sunscreen causes skin cancer” I’ve been asked by more than one person in real life: “How do I explain to someone that it’s not sunscreen, it’s the sun, it’s obviously the freaking sun?” Here’s a summary of the …
Sunscreen use is increasing, but skin cancer rates are also rising. Does that mean sunscreen doesn’t work, or – even worse – sunscreen might cause skin cancer? This was one of the common sunscreen myths I debunked in this video. Here’s one example, from @TonicHealth on TikTok: “Why is nobody talking about this? All these sunscreens are not doing the …
Today’s video is on one of the more commonly asked questions I get about sunscreen. You put your sunscreen on in the morning, apply your makeup over it… but you’re meant to reapply it every 2 hours. So how do you reapply it without messing up your makeup? And do you really need to reapply it? Here’s the video on YouTube, including a …
Sunscreen sticks are really convenient, but it’s difficult to measure out how much you need to apply, or whether you’ve applied enough. So I decided to put them to the test! I recently did a few investigations of sunscreen sticks. I tried to work out: How much protection you’re getting with reasonable amounts of sunscreen sticks How much you would …
There’s a lot of haircare advice based around the idea of “hair porosity”. This is a pretty complex term that can mean a lot of different things in different contexts (this might become a longer deep dive one day!). A lot of the advice does lead people to products that suit their hair better, but this is mostly just coincidence …