I suppose the specifics are novel enough to warrant a paper, but on a layman’s level it has been known for decades that UV ages your skin rapidly.

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tannhaeuser 14 hours ago | parent | next [-]

We can do better than "known for decades, on a layman's level" folklore and the answer actually isn't as straightforward ([1]). Recently there's even been discussion (by a Brit scientist I believe but I have no reference) on skin cancer vs more serious forms of cancer, and also about skin pigmentation playing a role here.

[1]: https://www.sciencedirect.com/science/article/pii/S0022202X2...

	▲	adrianN 9 hours ago \| parent \| next [-]
		Yeah of course scientists can still learn more, but at some point the layman can’t really get any new information from the press release.
	▲	anon373839 9 hours ago \| parent \| prev [-]
		That link does not refute the claim that UV ages your skin, which it unquestionably does.

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7bit 15 hours ago | parent | prev | next [-]

"known" is the wrong word. Laymen know a lot of things, like ingesting lead, radium, mercury and arsenic. Up until a couple of years ago, people "knew" that one glass of wine a day was healthy, when infact every drop is poisonous to the body.

In reverse, people thought (and too many still "know") that MSG and pasteurization is bad.

Don't use the word know, when in fact you mean "assume".

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djtango 15 hours ago | parent | next [-]

Is MSG not bad for you in the way aspartame is not bad for you? I totally get that MSG is naturally present in dashi but the chemistry of dashi (a very messy and complex mix of substances) vs purified msg is going to be different, and the concentrations the japanese consume food containing dashi are very different to the way UPFs and chinese restaurants gratuitously smother your food in it. MSG is to many cuisines what butter is to western cuisine (ie moar is always bettah)

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padjo 14 hours ago | parent | next [-]

There’s no evidence linking MSG specifically with any chronic health issues and little reason to suspect there would be in healthy people at the quantities generally consumed. Funnily enough many people who are wary of MSG and try to avoid it would be better off looking at their sodium intake, which we know for sure has long term health risks.

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djtango 11 hours ago | parent | next [-]

Well it seems pretty accepted that refined sugar is worse for you than consuming sugars locked up in fibrous fruits. From a similar intuition glutamates locked up in natural sources probably has a different bioavailability profile to refined MSG, incidental sodium intake notwithstanding.

In any case, everyone is different and catchall health advice lacks nuance. I have to very consciously consume more and more salt because I habitually cut it out to the point that I now suffer from hyponatremia especially as I exercise and sweat bucket loads.

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jtbayly 14 hours ago | parent | prev | next [-]

salt is bad again?

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loeg 7 hours ago | parent | next [-]

Salt's bad if you have sodium-responsive hypertension (maybe 30% of the population).

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shlant 13 hours ago | parent | prev [-]

salt was always advised to be limited, especially for those with high blood pressure. This hasn't changed, there are just vocal diet ideologues (mostly carnivore/keto) that are trying to post-hoc rationalize otherwise.

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amanaplanacanal 10 hours ago | parent | next [-]

From what I understand it's only really a problem for a specific set of high blood pressure folks. Something genetic I think.

I'm on blood pressure medication, and haven't received any advice about sodium intake.

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loeg 7 hours ago | parent | prev [-]

Only ~50% of the population is hypertensive, and only about half of them are sodium sensitive.

	▲	jtbayly 3 hours ago \| parent [-]
		And half of the half that are sensitive, it lowers blood pressure.

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Noaidi 10 hours ago | parent | prev [-]

I am someone who is sensitive to MSG and the new substitutes they put in food to replace it.

It is not "dangerous", and I think that is the problem with the messaging, but it does increase my anxiety, insomnia and fibromyalgia symptoms. And I also thing for most people it is fine, but it certainly does not work with my family's genetics. My mother had the same issue.

Many things in food now replace MSG. Any time you see a protein isolate, what they are isolating is the glutamate. Malted Barley Flour also contains high levels of glutamate and purines (like inosine) that work synergisticly with it to enhance flavor.

Glutamate is an excitatory neurotransmitter, and it makes your taste buds more "excited". My mouth tastes like metal whenever I have foods with glutamate. It is not pleasant for me at all.

https://pmc.ncbi.nlm.nih.gov/articles/PMC9883458/

https://www.eurofins.com/media-centre/newsletters/food-newsl...

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sallveburrpi 15 hours ago | parent | prev | next [-]

MSG is only bad for you because it makes things taste amazing so you are going to eat more than you actually should. Nothing wrong with butter btw.

As with most food stuffs if not consumed in moderation it can become a problem.

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throwup238 8 hours ago | parent | prev [-]

MSG is very safe in normal quantities with a similar safety profile to salt. You can drink MSG water to kill yourself but it’d be like drinking a gallon of seawater. It’s monosodium glutamate. Monosodium as in NaCl (table salt) and glutamate as in the amino acid and neurotransmitter. Once they disassociate in water, they’re both some of the most basic molecules used by all life, including for protein production.

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loeg 9 hours ago | parent | prev [-]

A glass of wine a day is within epsilon of the most healthy possible option. You're making this out as if this is a big shift, but it isn't. There are just huge error bars on the measurements relative to the effect of the intervention.

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baxtr 15 hours ago | parent | prev [-]

I don’t think it’s super straightforward. Another thing laymen know: Most younger people in southern Europe don’t look old.

	▲	blell 15 hours ago \| parent \| next [-]
		I actually live in southern Europe and most of my friends who are >35 and have been out and about for most of their lives do indeed look much older than they are.
	▲	brabel 15 hours ago \| parent \| prev [-]
		I think that’s because locals have some level of adaptation to their region. In Australia, you can really see how the high levels of sunshine affect the Northern Europe descendants who live there today. Some 30 yo women look easily 40.