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If there's one part of your biology worth understanding when it comes to energy, ageing, and longevity, it's the mitochondria. They show up in almost every meaningful conversation about why we age — and how we might do it better.
What mitochondria actually do
Mitochondria are organelles — tiny structures found inside almost every cell in your body. Their primary job is producing ATP (adenosine triphosphate): the molecule your cells use as fuel for virtually every biological process, from muscle contraction to brain function to immune response.
They do this through a process called the electron transport chain — a series of protein complexes on the mitochondrial membrane that transfer electrons to generate a charge difference, which drives the production of ATP. Think of it like a biological dam: the flow of electrons creates the pressure that powers the turbines.
The heart muscle alone contains mitochondria that account for around 30% of the cell's volume — a reflection of how energy-intensive keeping it beating continuously actually is.
Most cells contain hundreds to thousands of mitochondria. The number, size, and efficiency of those mitochondria is a key determinant of how energetic, resilient, and capable those cells are.
Why mitochondria decline with age
Mitochondrial function doesn't stay constant. From around your late 20s onwards, a gradual but meaningful decline begins — and by the time most people reach their 60s and 70s, the difference is significant.
Several things drive this:
- Oxidative damage accumulates. The energy production process itself generates reactive oxygen species — free radicals — as a byproduct. Over time, these damage mitochondrial DNA (which, unlike the DNA in your cell nucleus, has limited repair mechanisms), membranes, and proteins. Damaged mitochondria produce energy less efficiently and generate more free radicals, creating a self-reinforcing cycle of decline.
- CoQ10 levels fall. Coenzyme Q10 is the mobile electron carrier within the electron transport chain — it physically shuttles electrons between the protein complexes that generate ATP. Endogenous production of CoQ10 declines by an estimated 40–65% between the ages of 20 and 80. Less CoQ10 means less efficient energy production and more electron "leak" — which generates additional free radicals.
- Mitochondrial biogenesis slows. Your body has a process for generating new mitochondria, regulated largely by a protein called PGC-1α. With age, this process becomes less active — meaning old, damaged mitochondria aren't replaced as readily.
- NAD+ declines. Nicotinamide adenine dinucleotide is a coenzyme essential to mitochondrial metabolism. NAD+ levels fall significantly with age, further impairing the efficiency of energy production.
The practical result of all of this? Less cellular energy — which shows up as fatigue, reduced physical capacity, slower recovery, and poorer cognitive performance, among other things. Mitochondrial decline is now considered one of the primary hallmarks of biological ageing.
The broader consequences
Mitochondria don't just power cells — they regulate them. They play a role in:
- Apoptosis — the controlled death of damaged or dysfunctional cells (a process that goes wrong in both cancer and neurodegeneration)
- Calcium signalling — coordinating cell-to-cell communication
- Immune regulation — mitochondrial function directly influences inflammatory signalling
- Metabolic health — mitochondrial efficiency is closely linked to insulin sensitivity
This is why mitochondrial decline doesn't just make you feel tired. It's implicated in the progression of cardiovascular disease, type 2 diabetes, neurodegenerative conditions, and accelerated biological ageing more broadly.
A 2010 landmark study by Hagen and colleagues, published in FASEB, demonstrated that restoring mitochondrial substrates in aged models partially reversed age-associated mitochondrial dysfunction — early evidence that mitochondrial decline, while real, is not entirely irreversible.
What supports mitochondrial health?
The evidence base here has grown substantially. The interventions with the strongest support include:
- Exercise — particularly resistance training and zone 2 aerobic exercise — is the most powerful stimulus for mitochondrial biogenesis. Exercise activates PGC-1α, driving the creation of new, more efficient mitochondria. The mitochondria of trained athletes are larger, more numerous, and more efficient than those of sedentary individuals of the same age.
- Nutritional support — several compounds have direct roles in mitochondrial function: CoQ10 (the electron carrier itself), alpha lipoic acid (a mitochondrially-active antioxidant and metabolic cofactor), B vitamins including thiamine (essential cofactors in energy metabolism), and potent antioxidants like astaxanthin that protect mitochondrial membranes from oxidative damage.
- Caloric restriction and time-restricted eating — both activate mitochondrial biogenesis pathways and reduce the oxidative load mitochondria are exposed to. The longevity effects of caloric restriction observed in animal models are partly attributed to improved mitochondrial function.
- Reducing inflammatory burden — chronic inflammation directly impairs mitochondrial function. Addressing upstream inflammatory drivers protects mitochondria over time.
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Adequate sleep — mitochondrial repair processes are disproportionately active during sleep. Consistently poor sleep accelerates mitochondrial dysfunction.
The bigger picture
The mitochondrial theory of ageing — first proposed in the 1970s by Denham Harman — holds that the accumulation of mitochondrial damage over a lifetime is a primary driver of biological ageing. While the science has evolved considerably since then, the core insight has held up: how well your mitochondria function is one of the most important determinants of how well you age.
This isn't a fringe idea. It's the basis for a significant portion of longevity research currently underway in academic and pharmaceutical settings. The question has shifted from "do mitochondria matter for ageing?" to "how much can we do about it?"
How AEVUM's Daily Vitals Longevity Complex supports mitochondrial health
Several of the ten ingredients in AEVUM's Daily Vitals longevity complex were selected specifically for their roles in mitochondrial function and protection.
- CoQ10 (100mg) directly supports the electron transport chain — providing the substrate mitochondria need to produce ATP efficiently. It also acts as an antioxidant within the mitochondrial membrane itself, reducing the oxidative damage that accumulates with age. In the Q-SYMBIO trial (2014, JACC Heart Failure), CoQ10 supplementation was associated with significant reductions in major adverse cardiovascular events — one of the first supplements to demonstrate mortality reduction in a powered clinical trial.
- Alpha lipoic acid (100mg) is produced endogenously within mitochondria and functions as a cofactor in key enzyme complexes involved in energy production. Unlike most antioxidants, it is both water- and fat-soluble — active across the full range of cellular environments. ALA also actively regenerates CoQ10, vitamin C, vitamin E, and glutathione, amplifying the effectiveness of the antioxidant network.
- Astaxanthin (5mg) provides full-membrane antioxidant protection — its unique molecular structure spans the lipid bilayer, neutralising free radicals on both inner and outer surfaces simultaneously. It is estimated to be around 800× more potent than CoQ10 in certain antioxidant assays.
- Vitamin B1 / Thiamine (30% NRV) is a cofactor in the enzyme complexes that convert carbohydrates into acetyl-CoA — the molecule that enters the energy cycle. Without adequate thiamine, carbohydrates cannot be efficiently converted into cellular energy, regardless of how well other parts of the system are functioning.
Together, these ingredients address mitochondrial health from multiple angles: providing the electron carrier, protecting the membrane, regenerating the antioxidant network, and ensuring the metabolic inputs arrive efficiently.
References
Harman, D. (1972). The biologic clock: the mitochondria? Journal of the American Geriatrics Society, 20(4), 145–147.
Hagen, T.M. et al. (2010). Mitochondrial decay in the aging rat heart. FASEB Journal.
Mortensen, S.A. et al. (2014). The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure (Q-SYMBIO). JACC Heart Failure, 2(6), 641–649.
López-Otín, C. et al. (2013). The hallmarks of aging. Cell, 153(6), 1194–1217.
Gal, A.F. et al. (2020). HydroCurc® exercise recovery study. Nutrients.
