I’ve talked about visible light and blue light, and their effects on pigmentation in lots of detail before. There’s been more studies done since then – fortunately my conclusions are still correct! In short, the vast majority of us don’t have to worry about visible light or blue light coming from our screens. There just…
Do We Need to Worry About Heat From Sunscreens? (with video)
One of the big misconceptions about sunscreens is how they work, in particular chemical and physical sunscreens. All sunscreens work mostly by absorbing UV and converting it to heat. I’ve talked about this a whole bunch of times before, and I recently did a deep dive about the mechanisms behind how chemical and physical sunscreens…
How Do Sunscreens Work? The Science (with video)
I’ve had a lot of people ask me to explain the nitty gritty behind how sunscreen ingredients work. I warned everyone it would be super nerdy and really quite complicated, but a lot of people said it was fine… so here it is: the deep dive into how sunscreen ingredients work! A warning: this goes…
Should you avoid aluminium in deodorants? The science (with video)
I’ve recently been approached by several natural deodorant companies to talk about the health risks of aluminium-containing antiperspirants. As much as I’d like that sweet sweet cheque… I can’t. Because the science just isn’t there. So instead, I’m going to debunk the aluminium scaremongering. (Note to deodorant companies: There are valid reasons to switch to…
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