Does it make sense to have my hormones tested if I feel listless?
If, alongside listlessness, you also have other complaints such as weight gain, feeling cold, or mood problems, blood tests for your thyroid or testosterone are well worth having. If you have fatigue alone without any further complaints, the benefit of testing is small.
Listlessness can have many causes, and hormones are just one of them. Even so, testing is certainly worthwhile if you also recognise other complaints that fit with thyroid or testosterone problems. Think of persistent fatigue combined with weight gain, feeling cold all the time, or depressive feelings. That combination points more strongly to an underactive thyroid than fatigue alone.
When a genuinely underactive thyroid is present, treatment with thyroid hormone demonstrably helps: blood values normalise and most people notice that their symptoms improve. That said, around ten percent of patients continue to have complaints even when their results look good. This shows that a hormone test result does not explain everything.
Interestingly, a mildly abnormal thyroid value, where TSH is slightly too high but T4 is still normal, often does not lead to less fatigue or a better quality of life at all, even after treatment. A pooled analysis of 21 studies involving more than two thousand patients showed that thyroid hormone makes no measurable difference in how people feel when the abnormality is this mild. Treatment is therefore not recommended in such cases, unless TSH is above twenty or you are trying to become pregnant.
In men over forty, low testosterone is also a possible cause of listlessness, mood swings, and a low libido. But the diagnosis is not straightforward: you need multiple morning measurements as well as several matching symptoms occurring at the same time. Supplementation can help when a deficiency is proven, but it does not return everything to normal. Moreover, excess weight or diabetes may play a larger role than ageing itself.
Getting tested without any symptoms makes little sense: broad screening for hormone problems in people who feel well does not produce any health gain. If you do have multiple persistent complaints, a blood test is a logical first step, taken together with your general practitioner.
This answer is based on multiple reviews and individual studies, including a pooled analysis of 21 previously conducted studies involving more than two thousand patients. The evidence on the effectiveness of thyroid hormone for a genuinely underactive thyroid is strong. For a mildly abnormal thyroid value, the evidence is also well substantiated and consistently negative: treatment does not help against fatigue. The evidence on testosterone is less fully worked out; associations are plausible, but cause and effect are harder to establish because no single study has conclusively demonstrated causation.
How do I know whether my mood swings are hormonal or something else?
The cyclical pattern of your symptoms is the best distinguishing factor: if they occur only in the two weeks before your period and disappear afterwards, a hormonal cause is most likely. Track your symptoms over several cycles, and if they persist outside that window, discuss this with your GP.
How do you get your hormone levels tested during perimenopause?
Hormone tests during perimenopause are difficult to interpret: AMH is the most practical option, but does not reliably predict your fertility. Always have results interpreted with the guidance of a doctor.
Can eating too little disrupt your hormones, even if you do not have an eating disorder?
Even a temporary, substantial calorie deficit can disrupt sleep and reproductive hormones in healthy women; the timing of your meals also plays an independent role. If you are structurally eating little and experiencing hormonal complaints, that is a good reason to reconsider your eating pattern and potentially discuss it with a doctor.
Does my growth hormone decline with age, and does that matter?
Your growth hormone does indeed decline sharply with age. Reversing that with hormone injections offers little benefit in healthy older adults and carries health risks, including an increased risk of cancer.
Does excess weight really make your hormones worse?
Excess weight disrupts your hormones in multiple ways simultaneously, and this is not a coincidental association. In men, testosterone drops substantially, and losing weight partially reverses that.
Can low blood sugar disrupt your hormones, and how do you notice it?
Low blood sugar immediately raises stress hormones and causes symptoms such as trembling, sweating and irritability. People who experience this repeatedly risk those warning signals becoming progressively weaker, which makes it wise to discuss this with your doctor.