When the kids come to me with just about anything, complaint, fear, worry, good news, the response is always some variation of “I’m so glad you told me.”
Keeping screens at bay is hard. We instituted once a week movie night and no screens the rest of the week. Total is less screen time and less whining about it.
Mold is a silent threat, often going unnoticed as it quietly harms health. What’s concerning is that exposure to mold during early childhood leaves its mark way into adolescence. In a study published in Environmental Research: Health, a team from the University of Bristol, UK, tapped into data from the Avon Longitudinal Study of Parents and Children (ALSPAC)—a well-known birth cohort study also known as Children of the 90s—to explore how early-life exposure to indoor mold may affect lung function, its development over time, and the risk of doctor-diagnosed asthma.
The researchers analyzed medical data from nearly 14,000 children, whose health and development were followed closely from birth through to approximately 24 years of age, using information collected from clinic visits and questionnaires.
The data indicated that serious exposure to indoor mold at age 5 was associated with a nearly 6% reduction in lung function by age 15. There was also a strong association with asthma, with children exposed to serious mold by age 5 being 1.85 times more likely to have been diagnosed with asthma by age 8 compared to those with no mold exposure. This link, however, weakened as the child approached adulthood.
https://medicalxpress.com/news/2026-02-early-life-indoor-mold-linked.html
Same. My daughter tells me about her petty squabbles with classmates over all sorts of things, but I do my best to listen and encourage her to share. And we do the same with screens. Got rid of them entirely, and everything has been better. No more fighting over the TV remote or what to watch on Netflix. No more damn americanisms creeping into their vocabulary. And I would like to believe it makes them more creative, since now they need to kinda invent their own fun sometimes. Sometimes when I sleep longer on a Saturday morning I go downstairs and they’ve got out a whole bunch of paper, pens, crayons, glue, and they’re furiously working away trying to make stuff. Before we disabled the TV, they’d just be on the sofa staring at it.
Summary: The food on a two-year-old’s plate may cast a long shadow over their future academic performance. A longitudinal study following thousands of children in Brazil has found that toddlers who habitually consume “unhealthy” diets—characterized by ultraprocessed foods like instant noodles, candies, and processed meats—score significantly lower on IQ tests by ages six and seven.
Interestingly, the study found that while unhealthy foods actively hindered cognitive development, a “healthy” diet of fruits and vegetables didn’t necessarily boost IQ above average, largely because these foods are already so common in early childhood. This research highlights a “cumulative disadvantage,” where poor nutrition combined with early biological vulnerabilities (like low birth weight) creates a permanent gap in a child’s cognitive potential before they even start school.
Cannabis is detrimental to sperm: even if they can fertilize, there can be DNA damage. Many miscarriages and (in the case of IVF) “day 3 crashes” which is when paternal DNA normally kicks in, are cannabis related. Dr Natalie Crawford on the Huberman Lab.
Source: https://x.com/hubermanlab/status/2043696336567222393?s=20
The research behind this is wild. Your sperm carries a set of instructions that tell your genes when to turn on and off. A Duke University study found that THC rewrites those instructions. The more weed in your system, the bigger the changes. It goes straight for the genes your future embryo needs in its first week of life. I had to read the “day 3 crash” part twice. For the first three days after fertilization, an embryo runs entirely on the mother’s DNA. Day 3, the father’s genes switch on. If those genes carry cannabis damage, the embryo just stops growing. Fertility doctors see this happen in their labs: embryos that fertilized fine and looked healthy on day 2 go completely still by day 5. Boston University tracked 1,535 couples trying to have a baby. Men who smoked weed once a week or more doubled their partner’s miscarriage risk. That number held up even when the woman herself never touched cannabis. And the miscarriages clustered in the first 8 weeks, right when the father’s damaged DNA would be doing the most harm. Duke also found that the specific genes THC alters in sperm overlap with genes linked to autism. One of those genes, called DLGAP2, helps brain cells communicate with each other. It was changed in cannabis users’ sperm. When researchers bred THC-exposed male rats and checked their offspring, the same altered gene pattern showed up in the pups’ brains. The damage crossed a generation. Weed has gotten way stronger over the last 30 years. THC content was about 4% in the 1990s but nearly quadrupled to 15% by 2018, and modern dispensary strains regularly sit at 20-30%. Concentrates go up to 95%. Quitting for about 11 weeks (one full cycle of sperm production) reverses some of the DNA changes. Not all of them. Duke’s lead researcher says men should stop at least 6 months before trying for a baby. Half of your kid’s genetic blueprint comes from you, and right now, THC is editing that blueprint before conception even happens.
Source: https://x.com/anishmoonka/status/2043873122395533525?s=20
The research detailed in the text is grounded in several recent, high-impact empirical studies, primarily driven by epigenetic researchers at Duke University and epidemiologists at Boston University.
Below is the verified source material supporting each claim, alongside an analysis of the data and current scientific knowledge gaps.
Claim: THC alters epigenetic instructions, correlating with dosage, and targets genes needed in the first week of embryonic life.
Source: Cannabinoid exposure and altered DNA methylation in rat and human sperm (Epigenetics, 2018)
Analysis: The Murphy lab at Duke University identified altered DNA methylation at 3,979 CpG sites in the sperm of human cannabis users compared to non-users. The magnitude of these methylation changes correlated directly with the concentration of THC metabolites in the subjects’ urine. Pathway analysis revealed that the affected genes are heavily enriched in pathways critical for early embryonic development and organogenesis.
Knowledge Gap: While the alteration of the sperm epigenome is clear, it remains unproven how many of these specific methylation signatures survive the global epigenetic reprogramming (rapid demethylation and remethylation) that naturally occurs immediately after fertilization in humans.
Claim: Embryos rely entirely on maternal DNA for the first 3 days; paternal genetic damage triggers growth arrest by Day 5.
Source: Paternal contributions to offspring health: role of sperm small RNAs in intergenerational transmission of epigenetic information (Frontiers in Cell and Developmental Biology, 2019) & standard embryological data on Zygotic Genome Activation (ZGA).
Analysis: The “Day 3 crash” refers to the maternal-to-zygotic transition (MZT). For the first 72 hours (cleavage stage), embryonic development is driven exclusively by maternal RNA transcripts loaded into the oocyte. Around the 8-cell stage (Day 3), the embryo’s own genome—including the paternal contribution—activates. If the paternal genome is highly fragmented or epigenetically compromised by factors like THC or oxidative stress, the embryo fails to negotiate ZGA. Clinically, this presents as IVF embryos that divide normally on Days 1-2 but arrest and degenerate by Day 5 (blastocyst stage).
Claim: Male weekly cannabis use doubles the risk of early miscarriage, clustering in the first 8 weeks.
Analysis: Researchers at Boston University tracked 1,535 couples. Male cannabis use of ≥1 time per week during the preconception window resulted in an adjusted hazard ratio (HR) of 2.0 for spontaneous abortion.This doubled risk persisted even when strictly controlling for female cannabis use. The highest clustering of pregnancy loss occurred before 8 weeks of gestation, which perfectly aligns with the critical window of paternal gene transcription and early placental development.
Claim: THC alters the DLGAP2 gene in sperm, which is linked to autism; damage transfers to offspring in animal models.
Analysis: Duke researchers isolated significant hypomethylation in the DLGAP2 gene—a locus essential for synapse organization and heavily implicated in autism spectrum disorder (ASD) and schizophrenia. In a parallel in vivo rat model, adult males exposed to THC exhibited altered DLGAP2 methylation in their sperm.Crucially, their offspring subsequently exhibited corresponding epigenetic alterations in the nucleus accumbens of the brain.
Knowledge Gap: Translating rodent neurobehavioral and epigenetic models directly to human ASD is complex. Definitive proof of intergenerational transfer of ASD phenotypes in humans requires longitudinal, multi-generational cohort studies, which are currently underway but incomplete.
Claim: THC concentrations rose from ~4% in the 1990s to >15% by 2018, with concentrates reaching 95%.
Source: National Institute on Drug Abuse (NIDA): Cannabis Research Report
Analysis: Federal confiscation data confirms a rapid, systemic escalation in THC potency. Average flower potency was <4% in the early 1990s and exceeded 15% by 2018. Modern dispensary data indicates commercial flower frequently exceeds 20-30% THC, while extracted concentrates (shatter, wax, oils) sit between 80-95%. This dose-escalation fundamentally alters the toxicological and epigenetic impact of modern cannabis compared to historical baseline data.
Claim: An 11-week cessation reverses some, but not all, DNA changes; a 6-month abstinence is advised.
Analysis: Human spermatogenesis requires approximately 74 days (roughly 11 weeks). Duke researchers found that a 77-day abstinence period successfully mitigated the most severe methylation changes seen in the active-use baseline. However, residual epigenetic anomalies remained. Lead author Dr. Susan Murphy clinically advises abstaining for “multiple spermatogenic cycles” to achieve a complete epigenetic washout.
To avoid mental illness in children / adults… as much as possible help your kids avoid trauma:
The long-standing debate over “nature vs. nurture” in mental health has moved into a more complex phase: understanding how they collaborate to produce specific symptoms. A massive study of 163,704 individuals from the UK Biobank, published in 2026, has mapped how genetic predisposition and Adverse Childhood Experiences (ACEs) jointly influence the landscape of psychopathology.
The researchers from the Karolinska Institute found that while both genetics (measured by Polygenic Risk Scores, or PRSs) and childhood trauma are independent drivers of psychosis, their interaction is not uniform across different symptoms. For “non-specific” domains like anxiety and depression, the risk is largely additive: having both high genetic risk and a history of trauma simply piles on the danger. However, for “core” psychotic symptoms like hallucinations or mania, a multiplicative interaction occurs—where the presence of one factor significantly modifies the impact of the other.
Crucially, the study revealed that ACEs—ranging from emotional neglect to physical abuse—frequently exert a more prominent influence on adult mental health than common genetic variants. This aligns with the Stress-Vulnerability Model, suggesting that environmental insults during critical developmental windows can override or amplify genetic blueprints. One of the most striking findings was a “ceiling effect” in cognitive impairment: individuals with a high genetic burden for schizophrenia already face such significant cognitive challenges that additional childhood trauma does not worsen their cognitive scores to the same degree as it would for those at low genetic risk.
This research shifts the focus from broad clinical diagnoses like “Schizophrenia” or “Bipolar Disorder” to a more granular, symptom-centered perspective. By identifying which symptoms are most sensitive to environmental trauma versus genetic liability, clinicians can better tailor psychological care and preventative strategies.
The primary takeaway for those optimizing for long-term psychological health and neurological longevity is the dominant role of the early environment. Because Adverse Childhood Experiences (ACEs) demonstrate a dose-response relationship with severe adult psychopathology, early intervention is the most effective lever for maintaining psychological resilience.
Prioritize Trauma Resolution: Since ACEs can be stronger predictors of adult symptoms than common genetic variants, resolving the psychological and physiological impacts of early trauma is essential for long-term health, regardless of genetic “luck”.
Targeted Monitoring: Individuals with a family history of psychosis who also experienced ACEs should be hyper-vigilant for symptoms in the “additive” domains—specifically anxiety and depression—as these are the most likely to manifest early and synergistically.
Cognitive Buffering: Given that genetic risk for schizophrenia impacts longevity through cognitive-relevant pathways, engaging in cognitive-enriching activities may help mitigate some of the “ceiling effects” seen in the interplay between genetics and environment.
Acknowledge Help-Seeking Barriers: Recognizing that both genetics and environment influence the likelihood of seeking professional help can empower individuals to proactively bypass these internal “biases” and seek care earlier, which leads to significantly better long-term clinical outcomes.
Gentlemen, In addition to the women, You need to get healthy well before having kids…
For decades, the burden of “preconception health” has rested almost exclusively on mothers. Science is now correcting this imbalance, revealing that a father’s lifestyle choices are etched into his sperm long before fertilization occurs. A recent analysis in Nature Reviews Urology highlights a breakthrough study by Yin and colleagues, demonstrating that paternal endurance exercise acts as a powerful epigenetic modifier, gifted to the next generation via microRNA (miRNA) signatures.
The “Big Idea” centers on molecular cargo. Sperm do more than deliver DNA; they transport a complex payload of small RNAs that influence the earliest stages of embryonic development. When a father exercises, he triggers a specific “fitness signature” in his sperm—a group of ten miRNAs. One specific molecule, miR-148a-3p, serves as a master switch. Upon entering the egg, it suppresses a protein called NCOR1, which normally acts as a brake on mitochondrial biogenesis. By silencing the silencer, paternal exercise effectively “primes” the offspring’s cells for enhanced energy production and oxidative metabolism.
In mouse models, the results were striking: male offspring of exercised fathers showed superior glucose tolerance, higher endurance capacity, and more robust muscle mitochondria. Perhaps most significantly, this isn’t just a rodent phenomenon. Researchers found that seven of these key “fitness miRNAs” were also significantly elevated in the sperm of endurance-trained men compared to their sedentary counterparts. This suggests a deeply conserved biological mechanism for transmitting aerobic advantages across generations.
However, the “dosage” of exercise is a critical variable. While 3 to 8 weeks of moderate paternal training yielded metabolic benefits, excessively long-duration voluntary wheel running (12 weeks) in some studies actually led to offspring with increased obesity risk and reduced energy expenditure. This “Goldilocks” effect emphasizes that the germline is highly sensitive to the duration and intensity of physical stress. For the modern male, the message is clear: your gym sessions are not just for your own longevity—they are a biological legacy that could determine your children’s metabolic health.
The primary takeaway for men in the preconception window—defined as the months leading up to conception—is that moderate endurance training is a viable epigenetic intervention. To optimize the metabolic health of future offspring, fathers should aim for consistent, structured aerobic exercise (e.g., treadmill or cycling) rather than extreme, high-volume overtraining, which has shown potential for adverse “programming” in mouse models.
Identifying miR-148a-3p as a causal factor provides a specific target for future longevity-focused diagnostics. While commercial sperm miRNA testing is not yet standard, the correlation between high peak oxygen uptake (VO2 peak) and the presence of these beneficial miRNAs suggests that improving one’s own aerobic fitness is the most direct way to ensure a healthy epigenetic payload. Clinically, urologists and fertility specialists should treat the preconception period as a critical “window of opportunity” to modify the father’s metabolic risk profile, as these benefits appear to be conserved between mice and humans.
As suggested by @L_H (there), I’m starting this thread for parents.
First question asked by @relaxedmeatball (there):
On a related note - what are your opinions about EPA/DHA in children? There are various supplements specifically marketed for parents to give children for neurodevelopment and cognition, ADHD and behaviour, visual development, allergy/asthma, etc. They are extremely popular, and just in my kids playground, I’ve heard parents discussing it. I assume that most of the claims are bullshit, or at least highly speculative, but you’ve definitely read more about this than I have. Any thoughts?
2 portions of salmon or sushi a week probably mean supplementation has no extra benefit. But if fish not on the weekly diet for your kids, this is a Gemini response to get the discussion going:
Recent large-scale systematic reviews and meta-analyses provide clearer, more grounded context regarding how omega-3s impact childhood ADHD and behavior.
The current scientific consensus relies on a few critical, high-impact meta-studies that redefine how clinicians view fatty acid therapy.
A large-scale meta-analysis evaluated 22 randomized controlled trials (RCTs) covering more than 1,500 children aged 7 to 12 years to see how omega-3s affect core ADHD symptoms over time.
A major meta-analytic review shifted the conversation from purely academic focus (like reading or math scores) to emotional and behavioral regulation.
Comprehensive reviews across major databases (including PubMed and the Cochrane Library) evaluated both marine-sourced supplements and omega-3-enhanced foods to map out overall pediatric development.
If you look across all of these current meta-studies collectively, the medical guidance for utilizing omega-3s boils down to three strict criteria:
| Clinical Variable | Modern Meta-Study Directive |
|---|---|
| Duration | Must be administered continuously for at least 4 months to observe structural neuronal change. |
| Dosing | Must hit a therapeutic threshold (typically \ge 500mg–1,200mg of combined EPA/DHA) rather than token dietary amounts. |
| Expectation | Should be viewed as a foundational, complementary therapy to support behavior and focus, rather than a standalone clinical cure for neurodevelopmental conditions. |
Ha, I already made an ongoing thread about parenting for longevity. Enjoy!
Oops. Merging them then.
Ha, you’ll see my first very post is saying that we give the kids 250mg DHA per day. And my wife took fish oil right through the whole pregnancy and while breast feeding.
Argument/logic is/was: DHA is the predominant lipid in a child brain (15% of all fatty acids apparently), particularly in grey matter of the prefrontal cortex. It’s in breast milk. It’s compulsory to be included in infant formula in the EU. The developing brain rapidly accumulates DHA, especially through the first 2 years of life. Interestingly, children with ADHD also have lower O3 levels. So you have all this rationale saying that DHA is important for development etc. Plus, the western diet means that most children do not even come close to daily targets. However, it doesn’t necessarily mean they are O3 deficient, since they likely do consume ALA.
However, after looking into it some more, the evidence in favour of supplements is weaker than I thought. A couple trials have shown moderate benefits in asthma, but most of the big ones have failed. One study showed an IQ increase, but a followup found no changes in behaviour, performance etc.
The end conclusion is that maybe there are some benefits in people who are deficient or in the lowest percentage of intake. For otherwise healthy kids, I have no idea. Luckily my kids do eat plenty of fish, so I think based on our chats and the report below, I will stop buying DHA supplements for them.
I had Claude write a deep research report which I attach here:
Research Report.pdf (89.5 KB)
People who have experienced hardships both in childhood and in adulthood age faster than others, a new study shows.
Childhood trauma can have consequences for both our mental and physical health.
Research has shown this for a long time.
A new study now indicates that experiencing adversity both early and later in life may be especially damaging to health.
“Those who experienced adversity both as children and as adults showed the clearest signs of faster clinical and biological ageing. This was more pronounced than among those who experienced adversity during only one stage of life,” Monica Aas tells Science Norway.
The Norwegian researcher is the lead author of the study from King’s College London.
Together with colleagues, she examined nearly 154,000 people who answered questions about health and life events and also provided blood samples to the UK Biobank. This is the world’s largest health registry for research.
Abuse had the greatest impact
The researchers looked at people who had experienced physical, psychological, and emotional abuse.
They also included individuals who reported neglect and financial hardship.
Overall, 27 per cent reported having experienced things in life that had been a major burden for them.
“Our study shows that abuse was most strongly linked to earlier ageing, more strongly than neglect,” says Aas.
Paper:
Posted on May 13, 2026
Children who experienced adverse childhood experiences such as abuse or neglect were more likely to be healthier and higher earners as adults if they also were exposed to positive childhood experiences, including safe, supportive relationships, according to a new study.
The study, “Positive and Adverse Childhood Experiences and Adult Health and Economic Outcomes,” published in the June Pediatrics (published online May 13) analyzed data from the Behavioral Risk Factor Surveillance Survey from four states between 2015–2020, including 18,773 adults.
Researchers categorized positive and adverse childhood experiences and evaluated them against adult health and life opportunity outcomes. The states included in the survey were Kansas (2020), Michigan (2016), South Carolina (2019), and Wisconsin (2015). Adverse childhood experiences (ACEs) have been shown to have a significant association with alcohol and substance use; smoking; high-risk sexual behaviors; chronic diseases such as heart disease, diabetes, and autoimmune disorders; and mental health issues like depression, anxiety, and post-traumatic stress disorder.
In the survey, respondents were asked questions such as if they had a supportive adult in their lives, if they felt supported by friends or felt a sense of belonging in high school. Adults who had been exposed to childhood adversity and also reported having some positive childhood experiences (PCEs) were less likely to report having chronic conditions, poor physical health, and tobacco use.
The authors observe the potential power of positive experiences, especially among those who have experienced adversity, and emphasize the clinical and public health implications of interventions that effectively promote positive experiences among all children.
The seven positive childhood experiences (PCEs) evaluated in this study—derived from the Behavioral Risk Factor Surveillance System (BRFSS) relational health metrics—quantify specific aspects of emotional, environmental, and community support experienced prior to age 18.
The specific PCE items cited and analyzed are:
Family Communication: Feeling able to talk to family members about personal feelings.
Family Solidarity: Feeling that one’s family stood by them during difficult or challenging times.
Domestic Safety: Feeling safe and protected by an adult in the home.
Peer Support: Feeling supported by friends.
Institutional Belonging: Feeling a distinct sense of belonging while in high school.
Non-Parental Mentorship: Having at least two non-parent adults who took a genuine, supportive interest in them.
Community Connection: Enjoying active participation in broader community traditions.
https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2836904
Help them develop a healthy lifestyle
Healthy Diet
Exercise
Outdoor activities
Limit screen time
Reading books
Social activities
Community activities
One on one time with each parent.
Fundamentals - but… having raised 4 of our own, it’s not easy to achieve all the above.
Each person has their own individual traits and enabling them to explore their own humanity can put parent and child at odds. Then they become their own person, where the parent has little to zero influence.
What we have found is that while every one of the 4 went down a different path, some were on very dark paths, they have all, as adults come back to relative “health”. They love, support and respect their siblings and enjoy being in our family unit.
They had a foundation that weathered the storms and they recognize that. Each are working at doing the same for their little families.
Perhaps the biggest gift you can give your children… healthy parents before a child’s conception.
A summary from Google Gemini:
The biological trajectory of offspring longevity is shaped by a dual-lineage system of preconception health. While intrauterine programming via maternal overnutrition is well-documented, clinical and animal data reveal that paternal obesity independently drives epigenetic age acceleration, metabolic dysfunction, and shortened lifespans in subsequent generations. When both parents are obese, these risks compound synergistically.
Study: Soubry, A., et al. Paternal obesity is associated with IGF2 hypomethylation in newborns: results from a Newborn Epigenetics Study (NEST) cohort. Data hosted on DukeSpace / BMC Medicine.
Methodology & Findings: The NEST cohort evaluated DNA methylation patterns in umbilical cord blood to isolate the impact of paternal obesity from maternal variables. Paternal obesity was strongly associated with significant hypomethylation at the IGF2 (Insulin-Like Growth Factor II) differentially methylated region (DMR) in newborns (β-coefficient = -5.28, P = 0.003). Because IGF2 is a critical locus for placental growth and metabolic programming, its disruption establishes early-life vulnerabilities to cardiometabolic disease and subsequent premature mortality.
Study: Moore, E., et al. (2026). Maternal Obesity Decreases Offspring Lifespan. Indexed on PMC / Molecular Metabolism.
Methodology & Findings: Utilizing a controlled C57BL/6J rodent model to isolate pure in uteroprogramming from postnatal confounding, researchers demonstrated that maternal obesity restricts both median and maximum lifespan in offspring. Offspring were weaned exclusively onto a non-obesogenic control diet, yet still suffered early mortality driven by multi-organ, age-related systemic fibrosis (affecting the liver, heart, and kidneys). Gompertz mathematical modeling confirmed that mortality risks were permanently hardwired during early development rather than accelerating normal aging later in life.
Media Source: University of Toronto Temerty Faculty of Medicine. Before Baby: New study links father’s prenatal weight to early growth patterns, obesity risk in children. Full text accessible at the University of Toronto.
Coverage Context: This science communication release highlights human tracking data showing that children of obese fathers are twice as likely to follow a rapid, adverse BMI growth trajectory up to age five. Crucially, when both parents are obese, the child’s subsequent risk of metabolic acceleration increases more than fourfold, demonstrating a compounding intergenerational effect.
The Environmental Confounding Dilemma: In human epidemiological datasets, separating biological germline inheritance (sperm/egg epigenetic marks) from shared household environments remains highly complex. Families with high parental BMIs typically share obesogenic microenvironments, dietary habits, and socioeconomic variables that independently drive cellular attrition and shorten lifespans.
Sex-Specific Susceptibility Divergence: Animal models suggest that maternal and paternal lineages affect male and female offspring differently. For instance, paternal high-fat diet exposure frequently impairs glucose tolerance and placental vascularization more severely in female offspring than in males, a phenomenon currently attributed to sex-specific placental stress adaptations.
Tissue-Specific vs. Systemic Biological Clocks: While human data confirms that paternal obesity accelerates epigenetic clocks (like GrimAge) in peripheral blood, it is still an open question whether this correlates perfectly with accelerated aging in vital parenchymal organs (such as the heart or brain).
From a geroscience perspective, the transgenerational damage induced by parental obesity is not entirely immutable. Active research targets several molecular correction vectors: