Do we really have to reapply every 2 hours?
https://hidefromit.substack.com/p/there-is-no-evidence-you-s... seems to keep working over time better than this advice implies)
Is sunscreen the new margarine? (2019)
91–100 of 146 posts
Re: Is sunscreen the new margarine? (2019)
#92Coming from the skin cancer capital of the world (Australia) - no, no it is not
Yeah, lack of Vitamin D may or may not be a problem (well, obviously in extreme cases it leads to rickets, but that's rare). But skin cancer unquestionably is a problem, and not infrequently a deadly one. Pick your battles.
Very infrequently. Total death rate per year in the US is something like 900 per 100,000 adults, of which less than 3 are from skin cancer. Heart disease, stroke, other cancers, accidents, are all much bigger.
Re: Is sunscreen the new margarine? (2019)
#93Earlier quoted context omitted.
That logic is extremely broken. People who spend more time outside do so because of more physical activity . The sun exposure is a side effect. Drawing the conclusion that sun exposure is therefore safe is just totally bonkers.
He specifically mentions sunbathers. Not landscapers or construction workers
That is also selection bias. People who spend more time outside relaxing may have lower stress levels? Stress definitely contributes to cardiovascular illness.
Re: Is sunscreen the new margarine? (2019)
#94I made a small little web app calculator for myself and my family to figure out how long we could stay outside without needing sunscreen based on current UV and skin type. I use it daily in the summer and a couple thousand people use it every month also. You can check it out at https://sunburntimer.com . It's also free and open source software, github link in footer.
This is a clever idea.
Unfortunately, UV exposure is cumulative. So your skin is still getting damaged by the UV rays even if you're not getting burnt.
Re: Is sunscreen the new margarine? (2019)
#95Wow, it feels like nobody read the article. Findings: - high blood pressure leads to a lot of deaths - people that spend more time in the sun have lower blood pressure - skin cancer is caused by sun exposure, but it kills far, far less people than high blood pressure - people that spend more time in the sun have a lower rate of dying from skin cancer than people who spend less time in the sun! Summary: more sun expos…
Correction. More sun exposure is CORRELATED with being less likely do die. I don't think there's a single causal connection in this article.
Re: Is sunscreen the new margarine? (2019)
#96Wow, it feels like nobody read the article. Findings: - high blood pressure leads to a lot of deaths - people that spend more time in the sun have lower blood pressure - skin cancer is caused by sun exposure, but it kills far, far less people than high blood pressure - people that spend more time in the sun have a lower rate of dying from skin cancer than people who spend less time in the sun! Summary: more sun expos…
I did[1], and would be curious if anyone is familiar with the underlying study. How did they attempt to control for other factors? (I assume that they did, and am interested to know how) Also do you have to get a sunburn for sun damage to increase the risk of skin cancers? My understanding was accumulated sun exposure was the issue. [1] Lindqvist tracked the sunbathing habits of nearly 30,000 women in Sweden over 20…
The article cites another study by Richard Weller:
> Sure enough, when he exposed volunteers to the equivalent of 30 minutes of summer sunlight without sunscreen, their nitric oxide levels went up and their blood pressure went down.
I can't find information on the methods for this particular study. So I'm curious if he just set up UV lights on a timer and sat his subjects under them. That's something anyone can set up in their home office if they live somewhere gloomy. Instead of taking a vitamin D pill, turn the timer switch on for 30 minutes of a properly calibrated and positioned low-dose UV light (and out of direct line of sight to anyone not under it)
Or just take a nitric oxide supplement :)
Re: Is sunscreen the new margarine? (2019)
#97I made a small little web app calculator for myself and my family to figure out how long we could stay outside without needing sunscreen based on current UV and skin type. I use it daily in the summer and a couple thousand people use it every month also. You can check it out at https://sunburntimer.com . It's also free and open source software, github link in footer.
This is a clever idea. Unfortunately, UV exposure is cumulative. So your skin is still getting damaged by the UV rays even if you're not getting burnt.
Cumulative but with a repair mechanism. There's not necessarily "rollover exposure".
Re: Is sunscreen the new margarine? (2019)
#98Wow, it feels like nobody read the article. Findings: - high blood pressure leads to a lot of deaths - people that spend more time in the sun have lower blood pressure - skin cancer is caused by sun exposure, but it kills far, far less people than high blood pressure - people that spend more time in the sun have a lower rate of dying from skin cancer than people who spend less time in the sun! Summary: more sun expos…
Sigh. Correlation != causation It could be that people that spend more time in the sun are busy getting exercise. Which lowers blood pressure. It could be that people that spend a lot of time in the sun know that they have skin damage, and are more likely to detect melanomas due to more frequent checks of their damaged skin. Summary: More sun exposure may or may not lead to lower risk of death on two fronts. It seems…
Sigh indeed, since that's patently obvious and the study thus controlled for it.
Re: Is sunscreen the new margarine? (2019)
#99Earlier quoted context omitted.
I often embarrass my daughter when she has some new friend over. If the topic comes up, I give a demonstration. I'm 62 and I've never tried to get a tan and work indoors, and I haven't had a serious sunburn in close to 40 years. On the other hand, I lived spent the last 20 years in Austin, TX. I mow the yard and I ride a bike and in the summer months I put on sunblock before doing the bike rides an sometimes mowing.…
Photo claiming to be a 92 year old woman who used suncream on her face, but not her neck, for 40 years: https://i.ytimg.com/vi/ITlo7TAy_Hs/maxresdefault.jpg (She also appears to have Frank's Sign: https://en.wikipedia.org/wiki/Frank%27s_sign )
and then staying in the sun too long, over and over again.
Don’t forget that step.
Re: Is sunscreen the new margarine? (2019)
#100I made a small little web app calculator for myself and my family to figure out how long we could stay outside without needing sunscreen based on current UV and skin type. I use it daily in the summer and a couple thousand people use it every month also. You can check it out at https://sunburntimer.com . It's also free and open source software, github link in footer.
It would be useful to have an option to change the time of day, rather than always using the current time; e.g. for planning at night what to do tomorrow.
I came here to post this so glad I'm not the only one looking for specific time of day. Or at least give the user the estimated time they can be outside before getting burned? The timer feels great to fire and forget but I might want to plan and I couldn't figure out from the UI what the duration is "safe"