Hormones and Longevity: What Is Worth Doing and What Is Worth Avoiding
No hormone makes you live longer. What the evidence actually supports for ageing well, and why the clinics selling hormone optimisation are selling something else.
A man in his fifties came to me with a printout from a longevity clinic. Growth hormone, testosterone, a thyroid dose he did not need, and a panel of supplements. Eleven hundred dollars a month. He wanted to know whether I would keep prescribing it.
I would not, and the reasons are worth setting out, because this industry is growing quickly and it is built on a real question that deserves a better answer than it is getting.
The real question underneath
People do not want to live longer in the abstract. They want to stay strong, think clearly, sleep properly and avoid the decade of decline they watched a parent go through. That is a serious goal and endocrinology has genuine things to say about it.
What it does not have is a hormone that extends life. There is no such thing currently, and the confident claim that there is should be the first signal that you are being sold something.
Growth hormone, since it is the one they lead with
The logic sounds clean. Growth hormone declines with age, older people have less of it, therefore replacing it should reverse something. It is the same shape as an argument that works for thyroid hormone, which is presumably why it is persuasive.
It does not hold. In adults without a diagnosed deficiency, growth hormone administration has not been shown to extend life or meaningfully improve function, and it carries real adverse effects including fluid retention, joint pain, carpal tunnel syndrome and raised glucose. Raising glucose in someone whose actual risk is metabolic is working against the goal.
Worth knowing too: in several animal models, reduced growth hormone and IGF-1 signalling is associated with longer life rather than shorter. The relationship does not translate simply to humans in either direction, which is exactly why nobody should be selling you confidence about it.
Growth hormone deficiency is a real diagnosis, it has a proper diagnostic test, and it is treated by endocrinologists. It is not what is being prescribed in these packages.
Testosterone and oestrogen, more carefully
These need more nuance than growth hormone, because here there are genuine indications.
Testosterone replacement is appropriate in men with symptomatic, biochemically confirmed hypogonadism. It is not an anti-ageing intervention, there is no good evidence it extends life, and prescribing it on the basis of a single low-normal result and a tiredness questionnaire is not treating a condition.
Menopausal hormone therapy genuinely helps vasomotor symptoms, protects bone, and for many women started near menopause the risk-benefit balance is favourable. It is a treatment for symptoms and for bone, prescribed for those reasons. It is not a longevity drug and framing it as one does a disservice to the women who should be offered it for what it actually does. Some of that territory is in the perimenopause metabolic shift.
Thyroid hormone in someone with a normal thyroid does not improve ageing. It causes thyrotoxicosis, which among other things accelerates bone loss and raises atrial fibrillation risk. Why TSH alone is a poor basis for any of this is covered in TSH alone is not a thyroid panel.
What actually predicts ageing well
The measures that track most strongly with healthy ageing are unglamorous and none of them is sold in a package.
Muscle mass and strength. Among the most consistent predictors of functional independence and mortality in older adults. It is also the one you can directly change, at any age, and the one most people stop defending in exactly the decade it starts to matter.
Cardiorespiratory fitness. Similarly strong, similarly modifiable.
Metabolic health. Insulin sensitivity, blood pressure, lipids. These are the inputs to the diseases that actually shorten lives.
Sleep. Both duration and regularity, discussed in sleep is an endocrine event.
Not smoking, and alcohol within limits.
Notice that every item on that list is a thing you do rather than a thing you are given. That is not a coincidence, and it is the central difficulty of selling longevity medicine: the effective interventions are unbillable.
What the carousel got right
Longevity is not a supplement stack. It is protein, peace, deep sleep, and a body that works with you rather than against you. I would add resistance training to that sentence and otherwise leave it alone, because it is more accurate than most of what is published on this subject by people charging for it.
And the symptoms are worth taking seriously even when they are vague. Fatigue that sleep does not fix, skin that will not settle, cravings arriving from nowhere: these are worth investigating properly. Sometimes the investigation finds something treatable, which is the subject of your labs came back normal, so why do you still feel unwell. Sometimes it finds nothing, and that is also useful information, and it is a different thing from being handed a protocol.
What I told him
I stopped the growth hormone. We checked whether his testosterone result was real, on a proper morning sample with the right confirmatory testing, because it had been diagnosed on one afternoon draw. We stopped the thyroid hormone, which he had never needed. And we spent the appointment on resistance training, protein and sleep, which is less satisfying to leave with than a printout.
He is stronger now than he was then. None of it cost eleven hundred dollars a month.
Sources: Endocrine Society Clinical Practice Guidelines · National Institute on Aging
If any of this sounds like your experience, you can book a virtual consultation with Dr. Sater to review your history and testing in full.
This article is educational and is not individual medical advice. Speak with a qualified physician about your own health before making changes to your care.