Came across some shareable vids yesterday...
Matt does Fitness:
https://youtu.be/YrGTl3hx160?si=fYMvcv9lBGONJ7YD
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Agriculture:
Hard to make sense of the situations described. Like, who did the eventual burrying??
Was also wondering whether te shift to Agriculture was not making the men who settled
more feminine. Copilot wasn't having any of that:
Are contemporary human males more feminine, that is, running more on estrogen, than earlier humans were. I would think the transition to agriculture would entail eating more carbs on a daily basis...
Short answer:
No — contemporary human males are not running on more estrogen than earlier humans in any biologically meaningful sense. But industrialized lifestyles do increase estrogen recycling in the gut, and modern obesity rates increase aromatase activity, which can raise male estrogen modestly. This is not the same as “men becoming more feminine,” and it is not caused simply by eating more carbohydrates.
Below is the full picture, grounded in recent research.
🧬 1. Baseline male estrogen levels have not historically increased
Modern adult male estradiol levels still fall in the same typical range: 10–40 pg/mL .
There is no evidence that average estradiol levels in men today are higher than in pre‑industrial or pre‑agricultural populations.
What has changed is lifestyle — and lifestyle affects hormone ratios, not absolute sex differentiation.
🍔 2. Industrialized lifestyles increase estrogen recycling
A major new finding: industrialized populations have up to seven times greater estrogen‑recycling capacity in the gut microbiome compared with non‑industrial groups.
This means:
More estrogen is reabsorbed instead of excreted.
Circulating estrogen may be modestly higher.
This effect begins early: formula‑fed infants show 2–3× higher estrogen recycling than breastfed infants.
This is not “feminization,” but it is a measurable biological shift caused by:
industrial diets
reduced fiber
processed foods
altered microbiome composition
⚖️ 3. Obesity increases aromatase → higher estrogen
Aromatase in fat tissue converts testosterone into estrogen.
Modern obesity rates are far higher than in pre‑agricultural societies.
Research shows:
Men with higher body fat have higher aromatase activity and therefore higher estrogen.
Aging + increased fat also raise estradiol relative to testosterone.
This is the largest contributor to elevated male estrogen today — not carbs, not agriculture.
🌾 4. Did agriculture increase carbs → increase estrogen?
Your intuition is interesting, but the evidence doesn’t support a direct “carbs → estrogen” pathway.
What agriculture did change:
Higher carbohydrate intake
Lower dietary diversity
More insulin spikes
More body fat in many populations
But carbohydrates themselves do not raise estrogen.
Instead, insulin resistance and obesity (which can follow high‑calorie agricultural diets) increase aromatase activity.
So the causal chain is:
Agriculture → more calories → more body fat → more aromatase → slightly higher estrogen
Not:
Agriculture → carbs → estrogen
🧠 5. Modern diets affect hormone regulation differently than ancestral diets
Western diets (high fat, high sugar, low fiber) alter:
gut microbiome composition
estrogen recycling
insulin signaling
body fat distribution
Studies show industrialized microbiomes recycle estrogen far more aggressively.
This is a modern phenomenon — not an agricultural one.
🧩 6. So are modern men “more feminine”?
Biologically, no.
Why:
Male estrogen levels remain far below female ranges.
Testosterone remains the dominant hormone.
Slight increases in estrogen from obesity or microbiome changes do not alter sex traits.
“Feminization” is not a scientific term for these shifts.
What is true:
Modern men often have lower testosterone due to lifestyle factors.
Modern men may have higher estrogen relative to testosterone if overweight.
Industrialized microbiomes increase estrogen recycling.
This creates a different hormonal balance, but not a change in sex characteristics.
📌 Bottom line
Contemporary men do not have significantly higher estrogen than earlier humans.
But modern lifestyles — especially industrial diets, obesity, and altered gut microbiomes — do increase estrogen recycling and shift hormone ratios.
If you want, I can break down:
how male hormones differ between hunter‑gatherers, farmers, and industrial populations
how diet composition affects testosterone and estrogen
or how to reduce aromatase activity naturally.
Tell me about evolving hormonal balance...
The fascinating part of your question, Louise, is that human hormonal balance has evolved — but not in the simplistic “more estrogen now” way people often imagine.
What’s changed is the ecology of hormones: how they’re produced, recycled, suppressed, and balanced against each other. That balance has shifted repeatedly across human history.
Here’s the clear, structured breakdown you like — step‑by‑step, practical, and grounded in biology rather than internet myths.
🧬 1. The deep evolutionary baseline: hunter‑gatherer hormones
For most of human history, men lived in conditions that produced:
High testosterone (due to constant physical activity)
Low aromatase activity (because body fat was low)
Low estrogen recycling (high fiber diets → gut microbes flushed estrogen out)
High SHBG (sex‑hormone binding globulin), which keeps hormones tightly regulated
This created a hormonal profile that was:
high‑testosterone
low‑estrogen
stable and tightly controlled
This is the “ancestral male hormonal ecology.”
🌾 2. Agriculture changed hormones — but indirectly
Agriculture didn’t increase estrogen directly.
It changed energy availability, body composition, and micronutrient intake, which then changed hormones.
Key shifts:
More calories → more body fat → more aromatase → more estrogen
Less dietary diversity → micronutrient deficiencies → lower testosterone synthesis
More carbohydrates → more insulin → lower SHBG → more free estrogen
So the hormonal shift was:
Agriculture → higher body fat + lower SHBG → altered testosterone/estrogen ratio
Not “carbs cause estrogen,” but “energy surplus changes hormone metabolism.”
🏭 3. Industrialization changed hormones even more dramatically
This is the big one.
Industrial diets caused:
Low fiber → estrogen stays in the body instead of being excreted
Processed foods → altered gut microbiome → estrogen recycling increases 3–7×
Sedentary lifestyle → lower testosterone
Obesity → aromatase skyrockets → testosterone converts to estrogen
Environmental endocrine disruptors (plastics, pesticides, cosmetics) → mimic estrogen
This is the first era in human history where:
estrogen recycling is extremely high
testosterone is chronically suppressed
aromatase activity is widespread
endocrine disruptors are everywhere
This doesn’t make men “more feminine,” but it does change the hormonal balance.
📉 4. Modern men have lower testosterone than men 50–100 years ago
Multiple studies show:
Average testosterone has dropped 20–30% since the 1980s
Sperm counts have dropped 50–60% since the 1970s
SHBG has decreased
Estradiol is slightly higher in overweight men
These changes are lifestyle‑driven, not evolutionary in the genetic sense.
🔄 5. Hormonal balance evolves through ecology, not genetics
Human genes haven’t changed much in 10,000 years.
But hormone ecology has changed massively.
Hormones respond to:
diet
microbiome
stress
sleep
body fat
environmental chemicals
physical activity
When the environment changes, hormone balance shifts — even without genetic evolution.
So the “evolution” here is ecological, not genetic.
🧩 6. The real evolutionary story
If we zoom out, the hormonal trajectory looks like this:
Hunter‑gatherers
High testosterone
Low estrogen
High SHBG
Low aromatase
High physical activity
High fiber → low estrogen recycling
Agricultural societies
Moderate testosterone
Moderate estrogen
More body fat
Lower SHBG
More insulin
More aromatase
Industrial societies
Lower testosterone
Higher estrogen recycling
Higher aromatase (due to obesity)
Lower SHBG
Endocrine disruptors
Sedentary lifestyle
This is not “feminization.”
It’s hormonal ecology responding to radically different environments.
🧠 7. Why this matters
Hormonal balance affects:
mood
metabolism
fertility
muscle mass
fat distribution
energy levels
Understanding how it evolved helps explain modern health patterns — especially the rise in:
metabolic syndrome
infertility
low testosterone
obesity
endocrine disorders
🔍 A question for you, Louise
Would you like me to go deeper into:
How diet specifically alters testosterone and estrogen?
How the microbiome controls hormone recycling?
How modern endocrine disruptors affect male hormones?
Or how hormonal balance differs between men and women across history?
Pick the angle you’re most curious about and I’ll build a detailed breakdown
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Gemini:
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