Energy and mitochondrial
Unlock Your Energy
You are getting seven or eight hours in bed most nights and waking up as though you never went. Your labs came back normal, and the conversation more or less ended there, somewhere between managing your stress and considering an antidepressant. A second cup of coffee does not touch it, and ordinary things like the school run and the grocery list feel like wading through wet sand. That is not a discipline problem, and it is worth working through in order rather than guessing at it.
Educational and screening-oriented. Nothing here is a diagnosis.
Recognition
Does this sound like you
Fatigue is the most common complaint walked into a functional medicine practice, and also the one most likely to be waved off, because nothing on a standard panel looks alarming enough to act on. How your tiredness behaves across a week usually tells you more than the panel did.
- You are in bed for eight hours and you wake up exhausted anyway, which is one of the most common sentences said in a fatigue intake and one of the most confusing to live inside.
- Your morning is workable and then somewhere around three in the afternoon everything collapses, and it lifts within the hour once you eat something.
- You do something ordinary and pay for it a day or two later, and the crash is out of all proportion to what you actually did.
- You have been told your labs are normal or borderline more than once, and nobody has ever told you what your ferritin number actually was, while the fog and the word finding trouble have not moved at all.
- You menstruate, your periods are heavy, and the fatigue is reliably worse in the second half of your cycle.
- Cooking a real meal costs so much of the day that you end up eating whatever is nearest, which makes the afternoon worse, which makes cooking harder the next day.
What actually gets looked at
The two most decisive findings are not blood tests
My energy work runs through eight root causes, and blood work answers some of them cleanly. For others the honest answer is that no panel will tell you, and the two most consequential items, whether your sleep is actually restoring you and whether exertion costs you a day later, are both in that second group. So this starts with the shape of your week, and then orders the testing your pattern actually justifies rather than the biggest panel available.
The exertion question
The highest consequence finding in this whole area is answered by a question rather than a test: do your symptoms reliably worsen a day or two after exertion, out of proportion to what you actually did? If the answer is yes, that is post-exertional malaise, and it reframes everything downstream of it. Graded exercise is not the answer where it is present, and pushing through causes harm. Pacing, meaning planning to your average day rather than your best one, stops being a step inside the plan and becomes the thing that governs the plan.
The ferritin threshold
This is the single highest yield test in the workup, particularly if you menstruate. A double blind randomised placebo controlled trial in 144 non-anaemic women aged 18 to 55 with unexplained fatigue found that iron improved fatigue, and the subgroup analysis is the part that matters: only the women with ferritin at or below 50 improved. Most laboratory ranges still call a ferritin of 15 or 20 normal. So your iron is normal and your iron is high enough to not be causing your fatigue are two different statements. I ask for ferritin alongside serum iron, TIBC, transferrin saturation, and a complete blood count.
Sleep that does not repair
Hours in bed are not hours of repair, and two things are worth ruling out before you decide your fatigue is metabolic. Sleep apnea is the first. If you snore, wake with a headache, wake unrefreshed, or someone has seen you stop breathing, that deserves an assessment, because treating apnea treats the fatigue in a way no supplement will. The second is insomnia as its own condition rather than a symptom that will clear once the real problem is found. What I want here is not a blood test but a two week sleep log, which shows a pattern that an impression cannot.
The cortisol curve
I do run four point diurnal cortisol testing, and I am careful about what it is for. What it shows is the shape of the curve across a day, because a flat and low pattern and a wired and high pattern both present as exhaustion and they call for different approaches. A single morning blood draw cannot show that. What it is not is a validated diagnostic threshold, and it does not name a condition. Used for the pattern, it changes what I do next. Used as proof of a diagnosis, or as the justification for a glandular protocol, it is being asked to carry far more than it can.
Thyroid and blood sugar
A TSH on its own is a screening test, not a thyroid picture. Free T3 is the active hormone your cells actually use, and reverse T3 is an inactive form that rises under stress and illness and can block T3 from working even when free T3 looks adequate. Subclinical hypothyroidism, a raised TSH with normal thyroid hormone levels, affects up to one in ten adults and commonly shows up as fatigue and cognitive fog while the panel still reads in range. On the blood sugar side, fasting insulin is the marker most often left off, and it catches a resistance pattern years before glucose itself drifts.
Absorption and the celiac window
You cannot correct an iron or B12 deficiency through a gut that is not absorbing, which is the concrete reason the gut belongs in a fatigue workup rather than a general terrain argument. Celiac disease presents with fatigue often enough that its serology belongs in the panel, and there is a timing trap worth knowing: the test is only interpretable while you are still eating gluten. Remove it first and you lose any clean answer without a deliberate challenge later. That is the single most common way this diagnosis gets missed for years. B12, folate, and homocysteine belong together for the same reason.
Honest limits
This is where the marketing is at its worst
Fatigue attracts more confident claims than almost any area I work in, so here is the careful version. Adrenal fatigue, meaning a diagnosis in which chronic stress exhausts the adrenal glands into underproduction, is not a recognized clinical diagnosis, and no panel can confirm it because there is nothing validated to confirm. The genuine neuroendocrine research in myalgic encephalomyelitis and chronic fatigue syndrome is subtler and considerably more interesting than the marketing, and it does not translate into a supplement that fixes it. The same applies one layer down: there is no validated clinical test of whether your mitochondria are working, and anyone selling you one is ahead of the evidence.
The uncertainty runs deeper than the products. A formal review of diagnostic methods for myalgic encephalomyelitis and chronic fatigue syndrome found nine different sets of clinical criteria in use, and concluded that none of them have been thoroughly validated for identifying patients when real diagnostic uncertainty exists. A systematic review of dietary supplement trials in that same population found some promising signals sitting alongside a high risk of bias, small samples, and inconsistent results. Even pacing, which is the approach I would defend hardest, has a scoping review stating plainly that the literature base is not yet sufficient to dictate treatment practice. What decides it there is harm rather than certainty: graded exercise is reported by many patients to cause real deterioration, and pacing is not.
So much of the work here is sequencing and subtraction. Working out which of the eight keys are actually yours, testing where a test exists, saying plainly where none does, and being willing to conclude that the answer is sleep or pacing rather than anything you can swallow. A clean panel is information, not a dismissal. It moves the work onto load, sleep regularity, blood sugar stability, and mood, none of which show up on a panel and all of which are addressable, and that is a real and useful outcome rather than a dead end. Nothing in this process asks you to stop or change a prescription. That decision belongs to you and your prescribing clinician.
The pattern across weeks is the finding
The assessment maps your symptoms across systems in a few minutes, including the exertion question that changes the whole plan. The discovery session is a straight conversation about which of the eight keys look like yours, what would be worth testing next, and what probably does not apply to you at all. Consultations and ongoing care are both available wherever you are located, and being outside North Carolina is not a barrier to working with me.
Prefer to start on your own?
Take the guides with you
The same clinician-written material, as an instant download. Covers below are the actual files you receive.
The ebook
$27
Unlock Your Energy, 22 pages
- The keys to understanding it: what is actually going on, in plain language
- The evidence and its limits, stated honestly rather than oversold
- An actionable plan to work through, and what to expect from it
The kit
$47
Three working guides, 48 pages
- Lab guide. Understanding Your Energy Labs: which tests are worth running, and how to read what comes back
- Dietary support. The Energy Diet Guide: what the evidence supports about eating with this condition
- Supplement support. The Energy Supplement Guide: what has been studied, tiered by evidence, with the medication cautions that matter
The ultimate guide
$67
Everything above in one PDF, 70 pages
- The ebook and all three guides in one document, with a single contents page
- A bridge section that connects the understanding half to the doing half
- One file to keep, print, or take to an appointment
Instant download, yours to keep. Educational only; personalized care starts with a free Discovery Session.
Testing
You can order the labs yourself
If your physician will run the testing, ask them first. That is usually the cheaper route. If you would rather not wait, or you have already been told your labs are normal, many of the panels I use in practice can be ordered directly through my patient portal.
Ordering a test and knowing what to do with the result are two different things. Bring your results to your physician, or to a Discovery Session, before you act on them.