An Independent Magazine for the Second Act   ·   After Forty Feel
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The Sunday Letter Archive · 26 letters · 6 months

The Sunday letter archive.

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2025-2026 Gold-Standard Update (Harvard Health / NAMS / FDA-aligned): Recent data reinforces protein 1.6g+/kg + resistance training as top levers for midlife (Pontzer, Walker). FDA/HHS 2025 updates on MHT timing benefit body comp. GLP-1 synergy. Individualize with labs (ferritin, insulin, DEXA). Sources: NEJM, NAMS, 2025 reviews.

Not sure which letter? Take the Hormone Age Calculator (90 sec, free)

All 26 letters from the founding 6-month sequence. Free, searchable, citation-linked. Reply to any letter to ask a question — Alexander reads every response.

01
Mind · Cover

The HRT story your doctor learned wrong.

The 2002 panic was based on the wrong age group. The 2023 Hodis-Mack reanalysis tells a different story. 31% lower mortality in the 10-year window.

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02
Body · Research

The "meno-pot" isn't your metabolism crashing.

Pontzer 2021 in Science — 6,421 people. Energy expenditure is flat 20 to 60. The story is redistribution, not crash.

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03
Body · Sleep

Your sleep architecture is collapsing.

Deep sleep drops 75% from 20 to 50. Why you sleep 8 hours and still feel wrecked. The Walker-lab fix.

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04
Mind · Research

Brain fog has a name now.

Maki & Henderson 2023 — the neuroenergetic transition. Estrogen, glucose, and what HRT actually does for cognition.

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05
Money · Practical

The catch-up window most women miss.

The IRS opens a 7-year door at 50. $30,500/year for 10 years = $441,000. Only 14% of women walk through it.

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06
Looks · Research

Collagen: what the trials actually show.

A $2.5B category, mostly modest. Which 2 work. Which 47 don't. What outperforms it for skin.

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07
Life · Honest

The friendship architecture problem nobody warned you about.

The Harvard Study finding. Why loneliness peaks at 52. Five concrete moves to rebuild the social architecture.

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08
Mens · Cover

TRT after TRAVERSE.

The 5,246-man trial that answered the cardiovascular question. The 2023 result. The qualification criteria.

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09
Mens · Research

Peptides honestly — three tiers.

FDA-approved (Semaglutide, Tirzepatide) vs telehealth-compounded vs research-grey. Why we won't write buying guides for tier 3.

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10
Mens · Mind

The testosterone-cognition link nobody connects.

Why "low T" feels like brain fog (and isn't unrelated to your wife's brain fog). The diagnostic sequence.

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11
Body · Protocol

Visceral fat: four levers with numbers.

Sleep, protein floor 0.8g/lb, resistance 2x/week, alcohol below 4/week. The 12-week trajectory.

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12
Body · Protocol

Resistance training at 50, if you haven't lifted in 20 years.

The 6-week home protocol, no equipment. Then the gym transition. What to ignore.

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13
Body · Research

The alcohol cliff at 50.

Why one drink hits harder. The "moderate drinking is heart-healthy" myth dismantled. The actual safe-zone.

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14
Body · Sleep

The Walker-lab sleep protocol, step by step.

The 14-day reset. Temperature, light, food, alcohol, the anchor cycle. Measurable outcomes.

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15
Money · Tax

Your Roth conversion year is probably this year.

$40-$200K lifetime tax savings if you catch the dip. How to find your year. The 4-year retirement window most miss.

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16
Money · Social Security

Claim-age math: the move couples get wrong.

The survivor benefit math nobody runs. Why higher-earning spouse delaying to 70 protects whoever outlives the other.

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17
Life · Career

Second-act careers: pivoting at 52 without going broke.

20-25 productive years ahead, not 10. The pivot math. Three pivot types ranked by success rate.

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18
Life · Relationship

The midlife pivot conversation as a couple.

When one wants out and the other doesn't. The four conversations in order. What to do if the first one stalls.

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19
Life · Hormones

Hormones for both partners — what your spouse isn't saying.

The cross-spouse perimenopause/andropause translation. The five household interventions that compound for both.

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20
Body · GLP-1

GLP-1 truths for the woman on Ozempic.

What you weren't told before starting. Muscle loss, off-ramp, the chronic-use framing. The protein floor non-negotiable.

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21
Body · Peptides

BPC-157 and the healing-peptide category, honestly.

BPC-157, TB-500, CJC-1295. What we know. Why we won't write a buying guide. What outperforms them.

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22
Body · Microbiome

Microbiome reset at 50: signal vs hype.

What's worth your money (fiber, fermented food). What's over-marketed (custom microbiome tests, gut-reset cleanses).

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23
Body · Prevention

Bone density: the highest-stakes prevention conversation in your 50s.

The fracture you don't see coming until it ends your life. The 5-year post-menopause window. The DEXA scan most women don't get until too late.

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24
Body · Heart

Heart health post-menopause.

The pattern that doesn't get attention because it's not the male pattern. The CAC scan. The Lp(a) test. What gets undertreated.

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25
Mind · Mood

The hormone-mood link nobody connects.

Why depression spikes in late 40s for women. The hormone-mood link that gets treated as midlife crisis. HRT, SSRI, therapy — what works for which.

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26
Mind · Behavior

The 20-second principle.

How small changes actually compound in midlife when nothing big seems to be working. The five architecture changes. What you don't need.

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