joyjinmd
Region: US
Thursday 08 October 2026 00:37:30 GMT
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Mel :
If I put sunscreen on in the morning say around 7am, if I’m still indoors, do I have to reapply at 9am? Or is that just if I’m outside or driving in my car? Such a good post!
2026-10-09 02:02:19
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Courtney D :
Do people wash their face before applying a new layer of sunscreen? Or do you just keep adding it on?
2026-10-08 17:17:27
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Yumna :
Such an informative post! How come sunscreens haven’t been formulated to last longer than 2 hours? What’s the main barrier to that?
2026-10-08 13:29:21
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hisokasteardr0p :
Colorescience tinted sunscreen is the best thing I ever did for my skin (+microneedling)
2026-10-08 23:24:27
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AJ18 :
Really informative post!! Ty!!
2026-10-08 17:21:37
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som :
what are your favorite sunscreen brands dr. jin!!!
2026-10-08 01:14:28
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laurooirene :
I need somebody to make a list with the best sunscreens that follow these
2026-10-08 21:41:03
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Rae 🌀 PNW Outdoor Adventures :
This was so helpful thank you
2026-10-08 14:56:08
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Somi 🌸 :
I only started wearing sunscreen like 2 years ago am I cooked ??
2026-10-08 05:31:55
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UY Scuti 🍉 :
This literally scared me into remembering I didn’t put on sunscreen this morning and then putting on sunscreen
2026-10-08 18:00:07
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नीला | Nila :
If I don’t go in sunlight or only get 10 mins of sunlight when I go class to class in total do I still reapply every 2 hours? Or is it total time the sun is touching your skin
2026-10-08 13:28:18
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Ian :
Misconception: ‘UVA rays penetrate deep into the skin; UVB rays do not’ Science: We often read that UVB burns and UVA ages, seemingly because UVA penetrates deeper than UVB into the dermal extracellular matrix and thereby causes photoageing. Yet almost all experimental data from human and mouse studies show that UVB is more effective than UVA at causing biomarkers of photoageing, including elastosis, which is the hallmark of photoageing. Although UVA radiation penetrates slightly deeper into the dermis, a proportion of UVB radiation also penetrates to this depth. UVB radiation is more energetic than UVA, is more biologically reactive and is absorbed to a greater degree by DNA. Consequently, UVB is more able to cause direct damage to DNA, causing mutations in the epidermis that ultimately can lead to skin cancer. Source: https://onlinelibrary.wiley.com/doi/10.1111/ics.70068?af=R
2026-10-08 16:39:23
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sam :
The US needs to catch up on their sunscreen game! Loved this post, very informative!
2026-10-08 15:09:30
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