If you are tired no matter how much you sleep, you are asking a question millions of people ask every month. The unhelpful answers are everywhere: drink more water, take a multivitamin, try our energy blend.
Here is the more useful version, in the order a sensible person would actually work through it. We sell supplements, and they come fourth on this list — not first. That ordering is deliberate, because for most people persistently low energy is not a supplement problem.
Step 1: Rule out the medical causes first
Persistent fatigue is a symptom, and it belongs to a fairly short list of common, treatable conditions. Working through supplements before a blood test is how people lose six months.
The usual suspects your GP will consider:
- Iron deficiency — with or without anaemia. Extremely common, particularly in menstruating women, and it makes people profoundly tired.
- B12 or folate deficiency — more likely on a plant-based diet, after 50, or on long-term metformin or reflux medication.
- Thyroid dysfunction — an underactive thyroid causes fatigue, cold intolerance and weight change, and is easily missed.
- Vitamin D deficiency — common in Australia despite the sunshine, especially for indoor workers.
- Blood sugar problems — both diabetes and pre-diabetes cause fatigue well before anyone thinks to check.
- Sleep apnoea — people with it sleep eight hours and wake exhausted, because their sleep is fragmented all night without them knowing.
- Coeliac disease — fatigue is one of the most common presenting symptoms, often with no obvious gut complaint.
- Depression or anxiety — fatigue and loss of motivation are core physical symptoms, not a character failing.
If you have not had bloods in the last year and you are persistently exhausted, that is the single highest-value thing on this page. Our guide to what blood tests to ask for when you are always tired lists what to bring up so the appointment is productive.
See a doctor promptly, not eventually, if
Fatigue arrives alongside unexplained weight loss, night sweats, fever, breathlessness, chest pain, a new lump, blood in your stool or urine, or if it came on suddenly and severely. These change the priority.
Step 2: Look at sleep quality, not just hours
"Why do I wake up tired after eight hours of sleep" is one of the most searched versions of this question, and the answer is usually that the eight hours were not eight good hours.
Things that fragment sleep without waking you enough to remember:
- Alcohol. It helps you fall asleep and wrecks the second half of the night. One of the most reliable causes of eight-hours-and-still-tired.
- Caffeine too late. Half-life of five to six hours, so a 3pm coffee is still working at 9pm. More on this in why you crash after lunch.
- Snoring and apnoea. If a partner says you snore heavily or stop breathing, that is a GP conversation, not a lifestyle tweak.
- An irregular schedule. Going to bed at wildly different times costs you more than losing an hour consistently.
- Screens and light at night. Real, though smaller than the first four.
Fixing sleep quality beats every supplement in existence. If your wind-down routine is the gap, our Sleep, Stress & Mood range is built for that part specifically — but it supports a routine rather than replacing one.
Step 3: The everyday causes people skip past
Dehydration. Unglamorous and genuinely common.
Under-eating, or eating erratically. Especially low protein at breakfast, which sets up a mid-morning dip.
No movement. Counter-intuitive but well established — regular moderate exercise raises energy levels rather than depleting them.
Chronic stress. Sustained stress is exhausting in a way that sleep does not fix. This is where adaptogens like maca and ashwagandha get discussed — they work on the stress side rather than on energy directly.
The post-meal crash. If your tiredness is specifically after lunch, that is its own pattern with its own fixes.
Step 4: Where supplements actually fit
Now, and only now.
If a test found a deficiency, correcting it can make a dramatic difference — iron and B12 especially. That is treating a deficiency, and it should be guided by your GP with a follow-up test.
If your diet has real gaps, a foundation helps: see Daily Essentials. Omega-3 and a multivitamin cover the widest ground for the least money.
If you want a genuine lift rather than a fix, that is a different goal and worth being clear about. Beet root improves blood flow and has real evidence behind it for exercise performance. Yerba mate is caffeine, honestly labelled. NMN works on cellular energy over months and is not something you feel this afternoon.
We go through each of these properly in the best supplements for energy, and what each one actually does.
What supplements will not do: fix sleep debt, treat depression, correct an untreated thyroid problem, or substitute for a diagnosis. Anything sold to you on that basis is being oversold.
Questions people ask
My blood tests came back normal but I am still exhausted. Now what?
Common and frustrating. "Normal" often means a standard panel, which does not include everything relevant — and some results sit in the low-normal range while still causing symptoms. We wrote a whole guide on what to look at when bloods come back normal.
Why am I tired specifically in the afternoon?
A predictable dip in your circadian rhythm, usually made worse by lunch composition and caffeine timing. See the afternoon slump.
Is adrenal fatigue real?
The exhaustion people describe is real. The diagnosis is not recognised by endocrinology bodies, and the label can delay finding what is actually wrong. We looked at the evidence in is adrenal fatigue real.
Why am I more tired than I used to be in my forties?
Sleep architecture changes with age, and for women perimenopause commonly brings fatigue and brain fog years before any obvious cycle change. Worth raising specifically with your GP rather than accepting it.
Could it just be my period?
Cyclical fatigue is common, and heavy periods are a leading cause of iron deficiency in Australia. If tiredness tracks your cycle, mention it — it points somewhere specific.
If low mood is part of it
If the tiredness comes with persistent low mood, loss of interest in things you used to enjoy, or no motivation for weeks rather than days, that deserves attention in its own right and responds to treatment. Please talk to your GP.
If things feel heavier than that, support is available in Australia any time: Lifeline on 13 11 14 and Beyond Blue on 1300 22 4636.
Who wrote this, and why the order matters
Written by Daniel, founder of Nutritions Lab. We are a retailer, not a clinic — nobody here is a doctor, dietitian or pharmacist.
We sell energy supplements, and this article puts them fourth behind blood tests, sleep and basic habits. That ordering costs us sales and it is the correct advice: the person whose fatigue is untreated iron deficiency or sleep apnoea does not need our products, they need a diagnosis. We would rather say so.
Our approach is set out in our editorial policy. If something here is wrong, tell us and we will correct it.
General information only, not medical advice, and not a diagnostic tool. Supplements are not intended to diagnose, treat, cure or prevent any disease. Persistent fatigue warrants medical assessment.
