SUNSCREENS - What do you look out for?
Image is screenshot of DOI: 10.1039/b9pp00178f Source: Pubmed (Fig 2 is + great read)
I've talked about my search for the perfect sunscreen before and wanted to open up the discussion as to how other people choose theirs. Personally this is the sort of criteria I look at (in no particular order):
SPF - as high as possible, not least because there also tends to be a reasonable correlation with UVA-PF e.g. you're not going to find a low SPF product with stellar UVA protection, in general.
UVA-PF - as high as possible.
High critical wavelength/Broad-spectrum protection - Generally I like the high critical wavelength to be as high as possible (and simultaneously have a high peak absorbance which ties into ideas like high SPF and UVA-PF).
UV Filters with good coverage across UVB (280nm-320nm), UVII (320-340nm) and UVI (340-400nm) ranges - sort of the same idea as above.⠀⠀⠀ ⠀
UV Filters with good coverage across all wavelengths. Like the previous point, this sort of ties in with previous ideas on SPF, UVA-PF and broad-sunscreen protection but unlike those aforementioned ideas, examining UV filters on an individual basis ignores any potential synergistic effects of certain compositions of sunscreen filters. That said, I still find it a useful exercise to refer to Figure 2 in the paper I have screenshotted above and try to see if the filters in my sunscreen, in total, span a wide range of wavelengths and have relatively high absorbances across the whole UVA/UVB range.⠀⠀⠀ ⠀
In particular, I like to see good coverage between 380nm-400nm which if you see in the graph above, is sorely lacking in a lot of sunscreens - only Avobenzone and Tinosorb M perform as well as I would like in this range - problem is, as we'll get onto later, Avobenzone has poor photostability. The reason being is, if you read my review on the Heliocare 360 Fluid Cream sunscreen then you'll note that it has been postulated that protection in the far UVA region could be particularly critical for protecting against UVA1-induced photoageing (mediated by UVA-1 induced expression of MMP-1) ⠀⠀⠀ ⠀
CONTD IN 1ST COMMENT
First thoughts on these guys I cracked open last night: I’m really loving them. I read a lot of people suggest putting the Himalayan Charcoal on before your shower, because it’s messy to remove - I definitely concur with this. Even in the shower it was super messy due to the tea leaves in the formula. Washing it off in the shower is obviously fine for me and I’ll continue doing it like that! I could see the mask sucking a lot of unwanted stuff out of my nose and chin it did dry super stiff, so if you don’t like that feeling, this might not be the one for you.
After my shower I put the British Rose plumping mask on, and that felt amazing. My skin felt great last night and again this morning. Hoping to continue seeing results with further use
Good news: I found some good light in the new flat
PM routine, Sunday 15 October:
Body Shop Himalayan Charcoal Mask followed by Rose Plumping Mask
Thayers Witch Hazel and Rose
Glossier Super Bounce
The Ordinary Rosehip Oil
Aesop Camellia Nut Cream