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DOES ROSEMARY OIL WORK FOR HAIR GROWTH? THE SCIENCE

27 February 202427 February 2024


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 …

Read more

Categories Analysis, Critical Thinking, Hair, Science, Video


WHY YOU CAN’T TRUST STUDY ABSTRACTS

27 February 202427 February 2024

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 …

Read more

Categories Analysis, Critical Thinking, Science, Tutorial


WHY “SCIENTIFIC” PRODUCTS DON’T ALWAYS WORK: MECHANISTIC REASONING

27 February 202427 February 2024


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 …

Read more

Categories Analysis, Critical Thinking, Science, Tutorial



WHY “PEER REVIEWED” STUDIES AREN’T RELIABLE (ESPECIALLY FOR BEAUTY SCIENCE)

27 February 202427 February 2024


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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Categories Analysis, Critical Thinking, Science


IS BATISTE DRY SHAMPOO RUINING YOUR HAIR? THE SCIENCE

20 February 2024


Batiste is one of the most popular dry shampoos, but there are lots of posts on
social media warning people not to use it. Is it actually bad for your hair?
Here’s the lowdown. What are the claims? Here’s an example of one of these
videos, which I debunked recently as part of a YouTube video on haircare myths:
Video: …

Read more

Categories Analysis, Critical Thinking, Hair, Science, Video



CAN YOU TEST HEAT PROTECTANTS WITH FIRE? THE SCIENCE

26 February 202419 February 2024


You might’ve seen videos of people testing their heat protectant products by
trying to light them on fire. As many of you may have suspected, this is a
really ineffective test for whether a product protects your hair from heat.
Where does this test come from? This test seems to be promoted by a lot of
people selling Monat, an …

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Categories Analysis, Critical Thinking, Hair, Science, Video


DMDM HYDANTOIN AND FORMALDEHYDE IN HAIRCARE

19 February 202420 January 2024


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 …

Read more

Categories Analysis, Critical Thinking, Hair, Health, Science, Video



THE “EVERYTHING” SERUM: OLAY SUPER SERUM

17 January 20247 January 2024


I’ve been reviewing beauty products for more than 10 years, so not a lot of
things excite me – but some things did in 2023. The Olay Super Serum was one of
them! The video version of this review is here, keep scrolling for the text
version…. Olay Super Serum is the best new skincare product I’ve tried in a …

Read more

Categories Favourites, Review, Skincare, Video
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Hi! I'm Michelle, chemistry PhD, science educator and cosmetic chemist, and I'm
here to help you figure out which beauty products are and aren't worth buying,
using science.

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