critical thinking – Lab Muffin Beauty Science

Is benzene in benzoyl peroxide a cancer risk?

Michelle Wong — Wed, 27 Nov 2024 11:58:37 +0000

There’s been a lot of stories about benzene contamination in personal care products over the last 4 years. This year, benzene was discovered in benzoyl peroxide, a staple acne treatment. How concerned should we be? Petition and original paper I’ve written about the background behind Valisure’s benzene analyses before, as well as questions about the accuracy of their data and ...

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Red flags for unreliable sources: a guide

Michelle Wong — Wed, 23 Oct 2024 03:13:01 +0000

How do you check if information is reliable? One shortcut that works well (most of the time) is to check if the source itself is reliable! This is much faster and easier than trying to learn the science behind an area you’re not already familiar with – it takes a lot of time to properly factcheck information, even for experts. ...

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Benzene in your products, Part 2: The story of Valisure

Michelle Wong — Fri, 27 Sep 2024 15:01:50 +0000

Here’s Part 2 of our deep dive into benzene contamination in your products. In Part 1, we talked about whether the experiments were “realistic” (no), and whether the cancer risk was described accurately (also no). This time, we’ll be discussing the wider issues around the private lab behind these findings, Valisure. This is adapted from the video version (which works ...

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Does rosemary oil work for hair growth? The science

Michelle Wong — Thu, 22 Aug 2024 21:25:28 +0000

Is rosemary oil a natural, science-backed treatment for hair growth? According to a lot of doctors, scientists and trichologists across the internet, yes – there’s “scientific proof” that it works as well as minoxidil. But unfortunately, that isn’t true. It all seems to be a misunderstanding of a single study: Rosemary oil vs minoxidil 2% for the treatment of androgenetic ...

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Does tranexamic acid work? Response to The Beauty Brains

Michelle Wong — Wed, 31 Jul 2024 09:57:11 +0000

I recently talked about how I don’t think tranexamic acid works in most skincare products I’ve come across, in both a YouTube video and an Instagram post. Perry Romanowski and Valerie George of The Beauty Brains podcast commented on my opinions in Episode 369, “Can Tranexamic Acid Really Reduce Hyperpigmentation?”, published 14 July 2024. Unfortunately I don’t think they looked ...

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Why you can’t trust study abstracts

Michelle Wong — Mon, 26 Feb 2024 20:20:14 +0000

One of the biggest sources of myths in beauty is misunderstanding how scientific research works, and how to interpret scientific evidence. A huge problem I’ve seen is people relying on abstracts – the short summary of the paper – instead of reading the full text. Here’s why this isn’t a good idea. This article is based on part of this ...

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Why “scientific” products don’t always work: mechanistic reasoning

Michelle Wong — Mon, 26 Feb 2024 20:15:00 +0000

There’s a troubling pattern with a lot of “science-based” cosmetic products. Many of them make claims solely based on mechanistic reasoning, rather than any actual measured effects on humans. This is a big problem because mechanistic reasoning often doesn’t predict what happens on actual humans – and it’s especially the case with the ways these claims are often used for ...

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Why “peer reviewed” studies aren’t reliable (especially for beauty science)

Michelle Wong — Mon, 26 Feb 2024 20:00:04 +0000

There are a lot of myths in beauty, and over the years, I’ve noticed that a lot of them come from misunderstanding how science and scientific evidence works. Here’s one big misconception: the idea that if a source is “peer reviewed”, it’s automatically higher quality than a source that isn’t. Unfortunately, it isn’t any sort of guarantee, especially for a ...

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DMDM hydantoin and formaldehyde in haircare

Michelle Wong — Sat, 20 Jan 2024 07:00:12 +0000

DMDM hydantoin is a preservative commonly found in shampoos. It started getting a lot of attention in 2021, thanks to a number of lawsuits surrounding hair loss – so let’s talk about the science behind it and whether it’s safe. (This post is partly based off a longer video about haircare misinformation on TikTok, which also covers sulfates, silicones, testing ...

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Sunscreen absorption and receptor binding: Debunking TikTok Misinformation

Michelle Wong — Wed, 22 Feb 2023 11:00:25 +0000

There’s tons of misinformation on the dangers of sunscreen on social media, and it seems like all of the myths make the rounds each time a new platform emerges. Currently the trending platform is TikTok. Even though sunscreen safety is a topic I’ve covered many times, it repeatedly comes up in many different flavours. I’ll break down the misinformation in ...

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