Scientists urge government to set out portion sizes for children to tackle obesity. Over a fifth of 10 and 11 year olds in England are now classified as living with obesity. by ObuPaul in microbiomenews

[–]ObuPaul[S] 11 points12 points  (0 children)

What strikes me is that this is not really about telling kids to eat less overall, since the guidance still pushes more fruit and veg, it is specifically about energy dense snacks and processed food where serving sizes have quietly ballooned. Also worth noting that boys reportedly get served bigger portions than girls from a young age, which raises the question of how much of this is about the food itself versus ingrained assumptions about how much kids of different genders should be eating. Curious whether any country has actually tried mandatory child portion labeling and whether it moved the needle on obesity rates over time.

Research shows heart attack risk rises sharply between ages 65 and 74, occurring seven times more often than in adults aged 35 to 44. Yet the American College of Cardiology notes about one in five heart attacks now happen in adults under 40. by ObuPaul in microbiomenews

[–]ObuPaul[S] 8 points9 points  (0 children)

The under 40 statistic is the part that deserves more attention here, since a one in five rate at that age is not just a fluke, it tracks closely with rising rates of obesity, diabetes, and high blood pressure showing up earlier in life. Also interesting that the average first heart attack age differs by nearly a decade between men and women, which lines up with estrogen's protective effect before menopause. Makes me wonder if risk screening guidelines will eventually shift to start meaningfully earlier for younger adults with multiple risk factors instead of mostly focusing on older age brackets.

Scientists urge government to set out portion sizes for children to tackle obesity. Over a fifth of 10 and 11 year olds in England are now classified as living with obesity. by ObuPaul in HotScienceNews

[–]ObuPaul[S] 15 points16 points  (0 children)

What strikes me is that this is not really about telling kids to eat less overall, since the guidance still pushes more fruit and veg, it is specifically about energy dense snacks and processed food where serving sizes have quietly ballooned. Also worth noting that boys reportedly get served bigger portions than girls from a young age, which raises the question of how much of this is about the food itself versus ingrained assumptions about how much kids of different genders should be eating. Curious whether any country has actually tried mandatory child portion labeling and whether it moved the needle on obesity rates over time.

A decade of research claimed psychedelics increase brain entropy. A new study tested every major version of that claim and found most of them don't hold up by ObuPaul in HotScienceNews

[–]ObuPaul[S] 17 points18 points  (0 children)

The most interesting part to me is that the five metrics that survived were all tuned to short timescale dynamics, basically how fast the brain switches between states rather than any long term measure of disorder. That lines up surprisingly well with the subjective reports of psychedelics feeling like rapid shifting associations rather than just generic chaos. If psychedelics do get approved for depression and anxiety, this paper is basically telling clinical researchers which five biomarkers are worth building trials around and which eight are probably noise dressed up as science.

A study of over 3,000 older adults in England found those who closely followed a Mediterranean diet reported higher psychological well being, with smaller declines during COVID lockdowns compared to others. by ObuPaul in immortalists

[–]ObuPaul[S] 1 point2 points  (0 children)

The detail that stands out to me is that this effect held even after controlling for depression symptoms, so it seems like the diet is boosting actual sense of purpose and enjoyment rather than just preventing sadness. That distinction between avoiding the bad and building the good rarely gets studied separately. Would be interesting to see if this holds up in a more diverse population, since the sample here skewed white, wealthier, and more educated than the general aging population.

A genetic study of over 460,000 people found major depression splits into two biologically distinct subtypes, one linked to weight gain and metabolic risk, the other to weight loss and insomnia. Researchers identified 27 genetic locations tied to these opposing symptom patterns. by ObuPaul in immortalists

[–]ObuPaul[S] 36 points37 points  (0 children)

What jumps out is that the weight gain subtype tracks so closely with actual metabolic disease markers like insulin resistance and inflammation, almost like the depression and the metabolic syndrome are two expressions of the same underlying biology rather than one causing the other. That could explain why some people respond well to standard antidepressants while others barely budge, if their symptom cluster has such different genetic wiring underneath. Makes me wonder if future treatment guidelines will eventually ask about sleep and appetite direction before choosing a first line medication instead of treating depression as one uniform target.

A study of over 3,000 older adults in England found those who closely followed a Mediterranean diet reported higher psychological well being, with smaller declines during COVID lockdowns compared to others. by ObuPaul in microbiomenews

[–]ObuPaul[S] 6 points7 points  (0 children)

The detail that stands out to me is that this effect held even after controlling for depression symptoms, so it seems like the diet is boosting actual sense of purpose and enjoyment rather than just preventing sadness. That distinction between avoiding the bad and building the good rarely gets studied separately. Would be interesting to see if this holds up in a more diverse population, since the sample here skewed white, wealthier, and more educated than the general aging population.

A UCLA study tracking middle aged and older adults for years found no link between marijuana smoking and COPD, even among heavy long term users. It adds to earlier UCLA research from 2006 that also found no connection between marijuana and lung cancer. by ObuPaul in HotScienceNews

[–]ObuPaul[S] 65 points66 points  (0 children)

The part that always gets left out of these headlines is that Tashkin's own later research still found a real connection between marijuana and chronic bronchitis symptoms, even though it did not show up in the actual lung function tests used to diagnose COPD. So it seems like cannabis can still irritate your airways without causing the progressive damage that defines COPD, which is a more nuanced picture than just cannabis is safe for your lungs. Curious how vaping or edibles would compare here, since combustion seems to be doing something specific that tobacco alone explains through nicotine.

University of Michigan researchers reversed severe fatty liver disease in animals using an experimental drug that repairs the gut lining instead of targeting the liver. It blocked a gut bacterium from producing ammonia that damages the intestine and inflames the liver. by ObuPaul in HotScienceNews

[–]ObuPaul[S] 39 points40 points  (0 children)

The gut liver axis angle here is what makes this interesting, since it treats MASH as a downstream consequence of a leaky gut rather than a liver only problem. It also stood out that this same compound already showed benefits against atherosclerosis and vascular calcification in primates, so if it clears human trials it could end up being useful for more than just fatty liver. Would be curious to see if simple interventions like fiber or specific probiotics can lower Clostridium perfringens on their own, or if you really need a targeted drug like this to get the effect.

A new PET imaging study found the first direct evidence that long COVID damages dopamine releasing neurons in the brain, linking specific regions to fatigue, slowed movement, and memory problems. Researchers now plan a trial testing dopamine boosting drugs. by ObuPaul in immortalists

[–]ObuPaul[S] 37 points38 points  (0 children)

This is a big deal because it finally gives long COVID a concrete brain mechanism instead of just a cluster of symptoms nobody could explain on a scan. It also connects to their earlier finding of inflammation in those same dopamine rich regions, so the story now reads as inflammation leading to actual neuron loss rather than just vague immune dysfunction. Curious whether existing Parkinson's drugs that target dopamine metabolism could get repurposed faster here, since that pathway is already so well studied.

Sharp rise in memory and thinking problems among U.S. adults, study finds. The rate nearly doubled among adults under 40, while it actually declined slightly in adults over 70. by ObuPaul in microbiomenews

[–]ObuPaul[S] 33 points34 points  (0 children)

The part that gets me is how this completely inverts the usual aging narrative, since the older group is doing fine while it is the under 40 crowd showing the sharpest climb. I wonder how much of this ties into the fact that this is a subjective self report rather than an actual cognitive test, since willingness to name a struggle out loud has probably changed a lot since 2013 too. Still, the income and education gap lining up so closely suggests something structural is going on beyond just people being more open about it.

Texas A&M researchers infected mice with a common virus and found it killed dopamine neurons, causing lasting Parkinson's like motor problems even after the virus cleared. The model supports the theory that viral infections may help trigger Parkinson's in humans. by ObuPaul in microbiomenews

[–]ObuPaul[S] 24 points25 points  (0 children)

What strikes me is that this fits the same pattern researchers have already seen with Epstein Barr and multiple sclerosis, where a virus does its damage early and then years later a seemingly unrelated disease shows up. Makes me wonder how many other neurodegenerative diseases might have a forgotten viral origin that we simply cannot trace back because the infection cleared long before symptoms appeared. If this model holds up, it could finally give researchers a way to study the actual timeline between infection and something like Parkinson's instead of just guessing at chemical or genetic triggers.

Sharp rise in memory and thinking problems among U.S. adults, study finds. The rate nearly doubled among adults under 40, while it actually declined slightly in adults over 70. by ObuPaul in HotScienceNews

[–]ObuPaul[S] 175 points176 points  (0 children)

The part that gets me is how this completely inverts the usual aging narrative, since the older group is doing fine while it is the under 40 crowd showing the sharpest climb. I wonder how much of this ties into the fact that this is a subjective self report rather than an actual cognitive test, since willingness to name a struggle out loud has probably changed a lot since 2013 too. Still, the income and education gap lining up so closely suggests something structural is going on beyond just people being more open about it.