Unexplained fatigue, chronic stress, a lingering post-Covid picture… This kind of clinical presentation increasingly points to an often underestimated lead: the mitochondria.
And on the patient side, the questions come thick and fast in consultation: What should I eat to get my energy back? Which supplements are genuinely useful?
Here is a brief clinical and nutritional overview of mitochondrial support, drawn from the work of Sarah Bredon (Oreka Formation), which you can revisit through our Simplycure webinar on mitochondria and diet.
1. When should you think of the mitochondria?
Before we even talk about food or supplements, you first need to recognise the clinical contexts in which mitochondrial dysfunction may be at play.
In adults, several typical pictures should alert you:
- Persistent chronic fatigue, not relieved by rest or sleep
- Post-infectious asthenia (notably post-Covid) or an abnormally long convalescence
- Burnout, occupational exhaustion, difficulty “getting back on track”
- Chronic fatigue syndrome (CFS) or fibromyalgia, often associated with high oxidative stress
- Chronic digestive problems, linked to intestinal permeability or a stubborn dysbiosis
- Moderate cognitive complaints: problems with concentration, attention or “mental clarity”
In these contexts you can suspect cellular fatigue: the mitochondria are ticking over slowly, ATP production no longer keeps up, and the antioxidant defence systems are overwhelmed.
This is where targeted nutrition and the right supplements come in: to restart energy production, restore redox balance, and give cells back the cofactors they need to do their job.
2. Essential mitochondrial nutrients (from food or supplements)
There is no mitochondrial support without a solid nutritional foundation.
Certain molecules play a central role in ATP production, the regulation of redox status and intracellular enzyme function.
And while food often covers these needs, supplementation may prove useful in cases of deficiency or metabolic overload.
Main mitochondrial nutrients:
NutrientRoleFood sourcesVit. B1/B2/B3/B5Krebs cycle, respiratory chainPulses, wholegrain cereals, eggsMagnesium+300 metabolic reactions, ATPCocoa, nuts and seeds, green vegetablesZincATP cofactor, antioxidantOysters, walnuts, eggsIron / CopperCarriers in the respiratory chainLiver, dried fruit, dark chocolateCoQ10Electron transport, membrane protectionOily fish, offal, rapeseed oilAlpha-lipoic acidInterface between glycolysis and KrebsBroccoli, spinach, potatoes
In practice, these can be supplied through supplements (preferably bioactive or liposomal forms) as a short course, generally 6 to 12 weeks, particularly during a phase of exhaustion or post-infectious recovery.
3. Mitochondria and diet: the good practice to pass on in consultation
When energy fails there is no miracle solution: you first need to make sure the nutritional terrain is solid enough to make supplementation work.
Sarah Bredon makes the point in the Simplycure webinar: a tired mitochondrial cell can do very little if it has neither the right fuel nor the right tools to convert that fuel.
The mitochondrion therefore depends as much on what the patient eats… as on the way they eat.
Here are a few key practices to explore in consultation:
- Limit excessive intakes, even of “good” fats: chronic overeating slows mitochondrial biogenesis through AMPK activation.
- Check digestive tolerance: a balanced diet is not enough if absorption deficiencies persist (B2, magnesium, iron…).
- Reduce the sources of mitochondrial damage: alcohol, heavy metals, high-temperature cooking, chronic stress…
- Adjust carbohydrate intake to avoid energy swings: favour a low glycaemic index, spread across the day. Worth noting: a well-run ketogenic diet may stimulate mitochondrial biogenesis, but it should be used with caution.
4. Real-world cases: what should you advise?
In consultation it is often the small, targeted, gradual, consistent adjustments that make the difference to the mitochondrial terrain. The essential thing is to match the strategy to the clinical profile, targeting the right levers at the right time.
Case 1: chronic fatigue, stress, sleep problems
Profile: woman of 38, intense work pace, unrefreshing sleep, persistent fatigue despite a normal blood work-up.
Targeted supplementation (a 6 to 8 week course): Magnesium bisglycinate (200 to 300 mg/day), Vitamins B1-B6-B12, CoQ10 ubiquinol (100 mg/day), adaptogenic plants (rhodiola, eleuthero).
Case 2: long post-Covid or post-infectious convalescence
Profile: man of 52, persistent asthenia, breathlessness, brain fog.
Targeted supplementation (an 8 to 12 week course): Iron + copper (liposomal forms), Alpha-lipoic acid (100 to 200 mg/day), CoQ10 (100 to 200 mg/day) + L-carnitine (500 to 1000 mg/day), Vit. D + K2.
Case 3: mild cognitive problems, reduced concentration
Profile: woman of 61, frequent forgetfulness, mental fatigue, chronic stress.
Targeted supplementation (a 2 to 3 month course): Lion's Mane / Hericium erinaceus (1 to 2 g/day), CoQ10 ubiquinol + magnesium, B complex (B1, B3, B6, B9, B12).
Mitochondria & diet: simple, concrete, effective levers
Taking mitochondrial health into account opens one more door to a better understanding of persistent fatigue, difficult recovery or vulnerability to stress.
Even without a complex protocol, targeted adjustments may be enough to restart energy, improve recovery and restore a lasting balance in your patients' daily lives.
Need to dig deeper into particular clinical cases or to structure a supplement strategy? The Simplycure prescribing software for functional medicine doctors lets you build these multi-brand protocols in a few minutes. Head over to Simplycure!
