Tired All the Time? What's Actually Worth Checking

Of course you're tired. You have kids. That's the answer everyone gives, including the one you give yourself. And most of the time, it's true. But sometimes "just tired" is covering for something that has a name, a lab test, and a fix.

This isn't a post about adrenals or detoxes. It's about the unglamorous, checkable list of things that can drain your energy, and when it's worth asking for bloodwork instead of pushing through.

First, the Honest Baseline

Fatigue is one of the most common reasons adults see a doctor, and in most cases there isn't one single cause. Broken sleep, long days, stress, and under-eating all stack. That's normal. What's not worth ignoring is fatigue that doesn't improve when you get a few better nights, or that comes with other symptoms.

Low Iron, Even When You're Not Anemic

Iron deficiency is common, especially in women who menstruate, are pregnant, or are postpartum. It can cause fatigue before it ever shows up as anemia. In a randomized trial of non-anemic women with unexplained fatigue, those with low ferritin who took iron reported less fatigue than those on placebo (Verdon et al., 2003, BMJ). That does not mean everyone should take iron. Too much iron causes its own problems, which is exactly why it's worth testing first.

Thyroid

An underactive thyroid can cause fatigue, feeling cold, weight changes, low mood, and brain fog, and it's more common in women, particularly after pregnancy. It's diagnosed with a simple blood test, and it's very treatable (Garber et al., 2012, Endocrine Practice, clinical guidelines for hypothyroidism).

Even as a coach, I'm sometimes quick to reach for a solution for my own "tiredness." And to be honest, I often miss something. Years ago, while I was still taking graphic design projects, I was finishing up a big project. I was absolutely tired. I could barely function, couldn't sleep, and I could barely stay awake. But I fought through, loading up on vitamins and eating as healthy as possible. It turns out the stress I was already feeling was starting to affect my thyroid. My chronic stress was elevating my cortisol and suppressing my thyroid production. I was only able to find that out through bloodwork, and I'm glad I did, as it pointed to what I needed to do and the importance of it to regulate myself and get back to my baseline.

Sleep Apnea, the One People Miss

If you sleep a full night and wake up unrefreshed, especially if you snore, wake up gasping, or a partner has noticed pauses in your breathing, sleep apnea is worth asking about. It's far more common than most people think, and it affects men and women, including people who aren't overweight (Young et al., 1993, New England Journal of Medicine).

Other Checkable Culprits

Vitamin B12 and vitamin D levels, blood sugar, and mood (depression and anxiety often show up as exhaustion first) are all worth discussing with your provider. Some medications also cause fatigue. We're not telling you to take any of these supplements. Levels vary person to person, and guessing is how people end up taking things they don't need.

What You Can Do While You Sort It Out

Ask for a basic panel instead of guessing: a complete blood count, ferritin, thyroid (TSH), B12, vitamin D, and blood sugar are common starting points, and your doctor will decide what fits your situation. In the meantime, the unexciting basics still count. A meta-analysis of 70 studies found regular exercise reduced fatigue in healthy adults, even though exercise is the last thing you feel like doing when you're drained (Puetz et al., 2008, Psychotherapy and Psychosomatics). A 10-minute walk counts. So does eating regular meals. You don't need to fix everything at once.

Being tired is normal. Being tired for months with no improvement is information. Treating it like information, not a character flaw, is the whole point.

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Frank Madore is co-founder of ThriveLife, helping parents build sustainable health without the all-or-nothing mindset. More at thethrive.life.