Hormonal and sexual health: what changes at each stage of life
Introduction
Hormones are chemical messengers coordinating processes that occur in different organs and at different rhythms: metabolism, sleep, mood, bone density, muscle mass, fertility and desire. They don't work in isolation or at a constant level; they follow daily rhythms, monthly cycles and trajectories stretching across decades.
That last scale is the least understood and the least discussed. We know puberty and menopause exist, but in between there's a series of gradual changes often experienced with confusion because nobody explained them in time. And there's a notable asymmetry: female hormonal health has been studied and communicated considerably more than male hormonal health, which usually gets reduced to advertising messages about testosterone.
This article is a general map of those stages, not a treatment guide. The reason is simple: almost everything that matters here — when to investigate a symptom, which tests to request, whether hormone therapy is indicated — depends on individual history and requires medical assessment. What you'll find here is what's expected, what warrants a consultation and which common claims don't hold up.
And a caveat running through the whole text: lifestyle genuinely influences the hormonal system, but it doesn't substitute for diagnosis. Sleeping badly, under-eating and over-training dysregulate hormones; sorting that out helps. It doesn't cure hypothyroidism or ovarian insufficiency.
The hormonal system responds to how you live. That doesn't mean everything hormonal is fixed by living better.
The 12 keys to hormonal health
1. Understand that it's a circuit, not a list of substances. Hormones work through feedback: the brain detects levels and adjusts the signal. That's why "raising a hormone" is rarely the simple solution advertising promises, and why altering one from outside affects others.
2. Sleep is the biggest hormonal regulator you have. Growth hormone is released mainly in deep sleep, cortisol follows a daily rhythm that poor sleep flattens, and sleep deprivation disrupts leptin and ghrelin — which regulate appetite and satiety — as well as reducing testosterone in men. If something is going wrong hormonally, sleep is the first place to look.
3. Energy availability conditions everything else. Chronically eating below what you expend, especially combined with a lot of exercise, makes the body shut down functions it considers expendable: reproduction first. It's the mechanism behind amenorrhea in athletes and behind falling testosterone and libido in men with sustained energy deficit.
4. Body fat is an endocrine organ. Adipose tissue produces hormones and converts androgens into estrogens. Both excess and deficiency disturb the balance: obesity is associated with lower testosterone in men and with cycle disturbances in women, and extreme thinness with suppression of the reproductive axis.
5. The menstrual cycle is a vital sign. It's worth treating it as one: its regularity reports on general health. Cycles that disappear, become very irregular or change markedly deserve assessment. Losing your period from training hard or eating too little is neither normal nor desirable, even though it's sometimes presented as a sign of being in shape.
6. Perimenopause starts earlier than people think. The transition can begin several years before the final period, and in it estrogen doesn't fall linearly but fluctuates, which explains erratic symptoms: hot flashes, insomnia, mood changes, brain fog, dryness. Their fluctuating nature is why many women take a long time to connect them with this stage.
7. Menopause accelerates bone loss. Estrogen restrains the cells that resorb bone; when it falls, that loss accelerates over the following years. That's why the years around menopause are an especially valuable window for strength training and for securing protein, calcium and vitamin D.
8. Menopausal hormone therapy has been reinterpreted. After the initial results of the WHI study in 2002 its use fell sharply. Later analyses have considerably qualified that interpretation: the risk-benefit balance differs by age at initiation, time since menopause, route of administration and individual profile. It's a decision made with a professional, case by case, not one settled by what you read online.
9. In men the decline is gradual, not a cliff. Testosterone falls roughly one percent a year from the thirties or forties. There's no male equivalent of menopause. When marked symptoms appear, the cause very often lies in sleep, weight, alcohol, medication or an underlying illness rather than in age.
10. Be wary of testosterone clinics. Using testosterone without demonstrated deficiency or medical indication is widespread and not harmless: it suppresses your own production, reduces fertility and has cardiovascular and hematological effects requiring monitoring. A serious diagnosis requires compatible symptoms plus low levels confirmed on more than one morning blood test.
11. Sexual health is part of general health. Erectile dysfunction, for instance, is associated with vascular disease and can be an early sign of a cardiovascular problem: it's a warning worth heeding, not merely a performance matter. And desire depends on sleep, stress, medication, relationship and mood as much as on hormones.
12. Beware hormones sold without oversight. Melatonin, DHEA, growth hormone and personalized "bioidentical" preparations are offered with anti-aging promises the data don't support. They're hormones, not harmless supplements, and some aren't regulated as medicines despite acting as such.
In adolescence
This is when the hormonal axis starts up, and also when the habits that condition it later become established. Two things matter especially: getting enough sleep — the adolescent phase delay is physiological and clashes with school schedules — and not entering severe dietary restriction during the years of greatest bone building, because peak bone mass is reached shortly afterward.
In the reproductive years
Regular cycles usually indicate the system is working. It's worth consulting for absent or very irregular cycles, heavy bleeding causing anemia, disabling menstrual pain — which isn't normal and isn't something to endure — or difficulty conceiving after a reasonable period of trying. Conditions such as polycystic ovary syndrome or endometriosis are frequently diagnosed late, and consulting early shortens that delay.
In midlife
For women, perimenopause and menopause. For men, a gradual decline in testosterone usually accompanied by changes in body composition. In both cases, this is the stage where strength training stops being optional: it's the most direct countermeasure to the loss of muscle and bone that the hormonal decline accelerates.
From sixty onward
The focus shifts to maintaining function: muscle mass, bone density, vascular and cognitive health. Sexual health remains relevant and is frequently no longer asked about in consultations, which doesn't mean it stops mattering. And it's worth periodically reviewing accumulated medication, since several common drugs affect desire and sexual function.
When to consult
Cycles that disappear without pregnancy, bleeding after menopause — always — pain that prevents you living normally, hot flashes or insomnia that impair your functioning, a marked drop in desire accompanied by fatigue and loss of strength, unexplained weight changes, or any persistent symptom you've attributed to "age" without ever having it checked. That something is common doesn't mean it has no solution.
A final thought
Much hormonal distress is experienced in silence because nobody explained what was expected and what wasn't. Knowing that perimenopause can start years before the final period, that losing your period from training isn't an achievement, that testosterone falls slowly rather than suddenly, or that erectile dysfunction can flag something vascular, changes how you interpret what's happening. Look after the levers you do control — sleep, adequate energy, strength, alcohol — and take to a consultation whatever doesn't fit. In this area, self-medication and clinics promising hormonal rejuvenation do considerably more harm than good.