If you are tired in a way that sleep and coffee don't seem to fix, hormones are a reasonable suspect, but rarely the only one. Hormones and energy are linked through a handful of key players: thyroid hormone sets your metabolic pace, cortisol shapes your daily rhythm, and sex hormones such as oestrogen, progesterone and testosterone shift across the month or the decades. Most of the time, though, the biggest levers are still sleep, iron, blood sugar and stress.
This guide walks through what each hormone actually does for your energy, how things differ for men and women, and when "I'm just tired" is worth a blood test. We'll also be clear about where our THRIVE can help (low iron and B vitamin intake) and where it can't (almost everything hormonal).
Key takeaways
- Thyroid hormone, cortisol, insulin and sex hormones all affect how energetic you feel, but they interact with sleep, diet and stress rather than acting alone.
- An underactive thyroid is a common, very treatable cause of fatigue, and it is more common in women.
- Testosterone falls only gradually with age (under 2% a year from 30–40, according to the NHS); poor sleep and excess weight often lower it more than birthdays do.
- Menstrual blood loss makes iron deficiency far more common in women, and it can mimic "hormonal" tiredness.
- Persistent fatigue lasting more than a few weeks deserves a GP visit and basic blood tests, not a hormone-balancing supplement.
How do hormones affect energy levels?
Hormones are chemical messengers. A few of them have an outsized effect on how awake, motivated and physically capable you feel:
- Thyroid hormones (T4 and T3) set the speed at which almost every cell burns fuel. Too little and everything slows down: energy, digestion, even thinking.
- Cortisol is not just a "stress hormone". It follows a daily rhythm, rising sharply in the 30–45 minutes after you wake and falling through the evening. That morning surge is part of what gets you out of bed.
- Insulin moves glucose out of the bloodstream and into cells. Big swings after a heavy, refined-carb meal are one reason for the post-lunch slump.
- Oestrogen, progesterone and testosterone influence mood, sleep quality, muscle and motivation, and they change over the menstrual cycle and across life stages.
- Melatonin signals night-time to the body. Late-night screens and bright light delay it, which pushes back sleep and leaves mornings foggy.
The honest caveat: these systems are tightly connected. Bad sleep raises evening cortisol and worsens insulin sensitivity; being overweight lowers testosterone; chronic stress can disrupt periods. So "fix your hormones" usually means fixing the inputs that drive them.
Hormones and energy in women: the cycle, iron and midlife
The menstrual cycle
Many women notice more energy in the first half of the cycle, as oestrogen rises, and more fatigue, poorer sleep or lower mood in the week or so before a period, when progesterone and oestrogen fall. The NHS notes that premenstrual symptoms such as tiredness, bloating and irritability affect a large share of women, and that regular exercise, enough sleep and reducing stress can ease them. Tracking your cycle for two or three months is often more illuminating than any supplement.
Iron: the non-hormonal culprit hiding behind the hormonal one
Monthly blood loss is why iron needs differ so sharply. The NIH Office of Dietary Supplements sets the recommended intake at 18 mg a day for women aged 19–50, compared with 8 mg for men. Heavy periods, pregnancy and plant-heavy diets all raise the risk of deficiency, which causes tiredness, breathlessness and poor concentration. We cover this in detail in why iron deficiency could be the hidden reason you're always tired.
Perimenopause and menopause
Menopause typically arrives between 45 and 55, but the run-up (perimenopause) can start years earlier. Fluctuating oestrogen can bring night sweats, broken sleep, brain fog and low energy, and many women don't connect these to hormones because their periods are still happening. This is a stage worth discussing openly with a doctor: effective options exist, including hormone replacement therapy for suitable women.
Hormones and energy in men: testosterone, sleep and the waistline
"Low T" is heavily marketed, but the real picture is more modest. According to the NHS, testosterone levels in men decline by less than 2% a year from around 30 or 40, which on its own is unlikely to cause dramatic symptoms. When men in their 30s and 40s do have low testosterone, lifestyle is often involved.
Sleep matters a lot. In a small but widely cited 2011 study in JAMA, healthy young men restricted to five hours of sleep a night for one week saw their daytime testosterone levels drop by 10–15%. Abdominal fat and type 2 diabetes are also associated with lower testosterone, and obstructive sleep apnoea (common in men who snore heavily) can drag down both energy and hormones at once.
True hypogonadism does exist and needs medical diagnosis: morning blood tests, usually repeated, plus a look at symptoms such as low libido, erectile problems and loss of muscle. Testosterone boosters sold online are not a substitute, and some have been found to contain undeclared ingredients.
What about thyroid problems?
An underactive thyroid (hypothyroidism) is one of the most common medical causes of tiredness, and it is considerably more common in women than men. The NHS lists tiredness, sensitivity to cold, weight gain, constipation, low mood, dry skin and heavy or irregular periods among the typical symptoms. Because these creep in slowly, people often blame age or workload.
The good news: a simple blood test (TSH, often with free T4) usually confirms it, and treatment with daily levothyroxine is inexpensive and effective. An overactive thyroid can also cause fatigue, alongside anxiety, weight loss and a racing heart.
Is it hormones or something else? A quick comparison
| Possible cause | Clues that point to it | Typical first step |
|---|---|---|
| Underactive thyroid | Feeling cold, constipation, dry skin, slow weight gain | TSH blood test via GP |
| Iron deficiency | Heavy periods, breathlessness on stairs, pale skin, hair shedding | Full blood count and ferritin |
| Premenstrual changes | Fatigue that reliably appears in the week before a period | Track symptoms for 2–3 cycles |
| Perimenopause | Age 40+, changing cycles, night sweats, broken sleep | Discuss symptoms with a doctor |
| Low testosterone | Low libido, erectile problems, muscle loss, low mood | Morning testosterone tests, repeated |
| Poor or short sleep | Under 7 hours, loud snoring, waking unrefreshed | Sleep habits review; ask about sleep apnoea |
| Blood sugar swings | Crashes 1–2 hours after big carb-heavy meals | Adjust meal composition; check HbA1c if at risk |
What actually supports healthy hormones and steady energy?
None of this is glamorous, which is exactly why it gets skipped in favour of a "hormone reset" tea.
- Protect seven to nine hours of sleep. It is the single input that touches cortisol, testosterone, insulin sensitivity and appetite hormones at once. If late nights are the norm, our guide on why Southeast Asians sleep too little has practical fixes.
- Get daylight early. Ten to twenty minutes of outdoor light in the morning helps anchor your cortisol and melatonin rhythm. A walk to the MRT counts.
- Build meals around protein and fibre. A plate of nasi campur with more vegetables and a solid protein source keeps insulin steadier than a large plate of rice with a sweet drink. See why energy crashes after lunch for more.
- Lift something. Resistance training improves insulin sensitivity and supports healthy body composition in both sexes.
- Watch alcohol. It fragments sleep and, in heavier drinkers, is linked to lower testosterone.
- Check the basics before chasing hormones. Iron, vitamin D, B12 and thyroid function are cheap to test and common causes of fatigue.
When should you see a doctor about tiredness?
See a GP if fatigue has lasted more than three or four weeks without an obvious reason, or if it comes with unexplained weight change, very heavy or irregular periods, low libido, low mood, breathlessness or snoring with daytime sleepiness. Bring a short log: sleep times, cycle dates if relevant, and when the tiredness is worst. That turns a vague "I'm always tired" into something a doctor can work with.
Be wary of clinics or influencers selling hormone panels and personalised protocols without a proper consultation. Hormone levels vary by time of day and cycle phase, so a single random test is easy to misread.
Where TANO fits: THRIVE for the nutrition side of tiredness
No supplement rebalances your thyroid or testosterone. TANO THRIVE covers some of the nutritional gaps behind everyday tiredness: a daily 2-tablet serving provides 20 mg iron, B6 (6 mg), B12 (18 mcg) and 800 mg vitamin C, which increases iron absorption. Iron, B6 and B12 contribute to normal energy-yielding metabolism and the reduction of tiredness and fatigue.
It suits women with periods whose diets fall short of 18 mg iron. Men and post-menopausal women need only 8 mg, so ask a doctor before taking 20 mg daily long term. Diagnosed iron deficiency needs a doctor's plan, not a daily drink. If you take levothyroxine, keep it and THRIVE at least four hours apart, since iron reduces its absorption; the greens blend also contains a small amount of ashwagandha, so anyone with a thyroid condition should check first. Same for pregnancy, breastfeeding or other medication.
Take 2 tablets in 250–500 ml cold water once daily. Shop TANO THRIVE
This article is general information, not medical advice. Please talk to a doctor or pharmacist before making changes, especially if you are pregnant, on medication or managing a health condition.
Frequently asked questions
Can hormones really make you tired?
Yes. An underactive thyroid, the hormonal shifts before a period, perimenopause and low testosterone can all cause fatigue. However, poor sleep, iron deficiency and stress are more common causes, and they often interact with hormones, so it is worth ruling those out too.
Can TANO THRIVE help if I'm always tired?
It can help if part of the problem is low intake of iron or B vitamins: a daily serving of TANO THRIVE provides 20 mg iron plus B6 and B12, which contribute to the reduction of tiredness and fatigue. It won't fix thyroid problems, low testosterone, perimenopause or poor sleep; if tiredness lasts more than a few weeks, see a GP first.
What blood tests should I ask for if I'm always tired?
A GP will usually start with a full blood count, ferritin (iron stores), thyroid function (TSH), blood sugar or HbA1c, and sometimes vitamin D and B12. Hormone tests such as testosterone or oestrogen are typically added based on your symptoms, age and, for women, where you are in your cycle.
Do men have hormonal cycles too?
Men don't have a monthly cycle, but testosterone follows a daily rhythm, usually peaking in the morning. That is why testosterone blood tests are normally done early in the day. Levels also decline slowly with age, though lifestyle factors often matter more.
Do "hormone balancing" supplements work?
There is little good evidence that products marketed for "hormone balance" meaningfully change hormone levels in healthy people. Correcting a genuine deficiency, such as iron or vitamin D, can help energy, but that should be guided by a test rather than guesswork.
Does stress affect hormones and energy?
Chronic stress keeps the stress-response system switched on, which can disturb sleep, appetite and, in women, menstrual cycles. The result is often a "tired but wired" feeling. Reducing workload where possible, regular movement and consistent sleep help more than any single product.