labmuffin.com
#SciComm and educator, medicinal/supramolecular/synthetic chem PhD, cosmetic chemist, YouTuber
I explain the science behind beauty products and debunk misinformation. I talk a lot about sunscreen and "toxic" ingredients 🌞
labmuffin.com/links
362 posts
3,502 followers
437 following
Getting Started
Active Commenter
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This is so gorgeous, well done! Colourwork stresses me out, this looks super cute and ice creamy
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I'm not sure that explanation would be reassuring - given that only their formula dropped that much and that consistently, it would be an unusually unstable formula, which would be unstable during use as well (Lean Screen doesn't seem like an unstable formula IMO)
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Umbrellas actually give less protection than you'd expect! But layering everything is a good approach labmuffin.com/do-hats-and-...
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They only protect against UVA and UVB
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I talked about 2010 and 2019 ISO24444 together - 2010 is still allowed for AU sunscreens launched before July 2024 (changes mostly impacted reproducibility)
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I don't love the framing of one lab's results as the "true" SPF, but the imprecise nature of SPF testing doesn't seem well known (also SPF tests have a +/-17% (95% CI) limit, for methodology nerds)
MEASURE YOUR FINGERS 😤😤😤
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I think brands with lower SPF results should investigate - most brand statements indicate they're doing that, but there are a few bizarre claims in there (IMO)...
SPF 50+ actually means SPF 60 or over in Australia, so technically only 2 sunscreens "passed", not 4
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User error is a much bigger cause of sunscreen failure than formulas (not applying enough, not reapplying, relying on sunscreen alone)
MEASURE YOUR FINGERS 😤😤😤
The largest clinical trial on sunscreen (the Nambour trial) found huge benefits from SPF 16 (and it didn't look very photostable!)
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Mineral sunscreens are generally less robust, more easily affected by small changes (also seen in Consumer Reports tests)
The newer ISO tests should improve reproducibility, and make it easier for brands to ensure SPF won't drift over time (maybe this should be required?)
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Formulas can change over time (slight changes in raw ingredients etc)
I'd guess a lot of "fails" are explained by interlab variability (the lab Choice used tends to get numbers on the lower end), the rest by formulas changing over time (especially the ones that tested much lower)
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It looks so good! I love PetiteKnit patterns
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Extremely cool!
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We need to thank people for getting sick to build the wall of immunity
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(/s means sarcasm)
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Because if it mutates it'll become milder, mutations are always milder... that's what we learned with covid (/s)
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www.justonecookbook.com/green-tea-wh...
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I don't really have a favourite brand, but I'm also a fan of matcha soft serves!
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She sells a $597 USD "low tox university" course 🫠
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Oh that would be awesome! @dwisk.us pls
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It's when two atoms love each other very much
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I think if I ever met a knitter in person I'd get flustered and unknowingly say something offensive about fibre preferences 🫣
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This is a good reason to carry soy sauce fish around
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What was the gender split of viewers for that video?
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I'm glad you're enjoying it! 😊
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Alternative preservatives don't work as well, so you end up buying more products, and at a premium - fearmongering over trace levels is the actual scam, look up the huge uptick in product recalls over contamination
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Yuka is not based on science, it completely ignores dose which is crucial to work out safety (it's what happens when they make an app with no scientists involved)
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On the bright side, US drug prices have little relationship to cost... 🤷🏻♀️
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Medicinal chemist here, unfortunately there's a 99.9999% chance that multiple things used in the synthesis come from China, and are either unavailable or 10x the price elsewhere
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New development - turns out he's been plagiarising, to no one's surprise www.threads.com/@1elizabeth_...
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I think the problem here is more that they don't have much formal research training (most of the ones who recommended skipping the methods don't have any post-grad science qualifications, some are even undergrads) - journalists also often assume they don't need to understand the methods...
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A whole bunch of "science communicators" got really angry at me for saying this on Threads
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This is actually huge (it's a man's size), 4 mm needles and Aran weight yarn! Can't remember how long it took because I had a year-long break in the middle 😂
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Thank you! Husband picked it, I was skeptical at first but this was a gorgeous yarn
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Thank you!!
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Thank you queen! 🥰
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That's really nice to hear! Sometimes I wonder if people really want my random musings, but I like how it feels like 2010s blogs again ❤️
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Thank you! 🙏🏻
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Also the specific compound in the rosemary extract that had good receptor binding is hydrophilic, it isn't present in rosemary oil 🫠
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American Academy of Dermatology - they also keep featuring dermfluencers who promote random hair oils...
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Did you see the AAD rosemary oil thing? Mind-boggling
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Is 8 fps standard for gen AI videos? It's usually minimum 24 fps for a YouTube video, I assume that would be roughly 3 times more?