Learn your signalsbefore chasing changes.

Evidence-led men's health guides covering testosterone, DHT, hormone balance, hair loss, fertility, semen analysis, sleep, gym nutrition, and supplement claims — with visible sources and clear non-diagnostic limits.

FEATURED SIGNALNEW BASELINE

Start with the
right question.

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Hormone Fundamentals / 01Established

What does testosterone actually do?

A foundational men's health guide to testosterone — the hormone behind muscle, libido, bone strength, mood, and more — and why it is not a one-number answer to every health question.

Read the signal
EVIDENCE NOWNOT A NEWS FEED

Three things worth
understanding slowly.

Each note shows its confidence level up front, so the design never implies more certainty than the source can carry.

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Hormone Fundamentals / 02Established

Low testosterone: why one test is not a diagnosis

Guidelines recommend diagnosis only when compatible symptoms or signs occur alongside unequivocally and consistently low testosterone, confirmed with accurate testing. One result is not enough.

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Hair & Androgens / 03Established

DHT vs testosterone: what is the difference?

Testosterone and its metabolite dihydrotestosterone (DHT) are both androgens. Their effects — on hair follicles, prostate, skin, and other tissues — depend on receptor activity and tissue-specific biology, not a simplistic good-versus-bad label.

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Hair & Androgens / 04Established

Male-pattern hair loss: evidence, time, and tradeoffs

The American Academy of Dermatology identifies topical minoxidil and prescription finasteride as FDA-approved treatments for male-pattern hair loss (androgenetic alopecia), with different timelines, maintenance needs, and possible side effects.

PATTERN FILESTHE LONG READ

Evidence you can
come back to.

Cornerstone explainers designed to make health information more usable, not more urgent.

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Fertility & SpermEstablished

Testosterone therapy and fertility: what changes the conversation

A men's health explainer on why testosterone replacement therapy (TRT) and fertility planning are not interchangeable goals — including sperm production effects, alternative treatments, and why this conversation belongs with a urologist or endocrinologist.

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Fertility & SpermEstablished

Semen analysis: what the measurements can and cannot say

A men's fertility health guide to semen analysis: sperm concentration, motility, morphology, and what WHO reference values mean — without turning a single result into a personal diagnosis.

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Evidence LedgerSupported, limited

Do testosterone boosters work? Read the evidence before the label

A men's health evidence review of testosterone boosting supplements — zinc, ashwagandha, D-aspartic acid, fenugreek, and others — covering study populations, comparators, outcomes, durations, and what most gym supplement labels leave out.

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Daily InputsUncertain

Sleep and testosterone: what we can and cannot say

Sleep is one of the most impactful natural levers for men's health and hormone balance — but short-term experimental findings are not a universal testosterone promise. Here is what the evidence actually shows.

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START HEREDON’T SELF-DIAGNOSE

Tracking a pattern
is not the same as
treating a condition.

Corhack can help you keep the context around sleep, training, meals, and daily tasks in one place. A useful record of a day can help you ask a clearer question; it cannot diagnose a condition, interpret a laboratory result, or replace a qualified clinician.

Track context. Keep the inputs you chose to notice in one personal view.

Ask a better question. Use the pattern as a starting point for reflection or a clinical conversation.

Keep the boundary. Seek qualified care for symptoms, test results, or treatment decisions.