What Is CoQ10 and Why Does Bovine Heart Supply It Best?

CoQ10 is a fat-soluble compound present in the mitochondria of every living cell. Its primary job is to transfer electrons during the process that converts food into ATP, the energy currency your cells run on. Without adequate CoQ10, mitochondria work less efficiently, energy production slows, and the organs and systems with the highest metabolic demands — the heart, brain, ovaries, and muscles — are the first to feel it. The heart concentrates the highest levels of CoQ10 of any organ in the body, which is why bovine heart is the richest whole-food dietary source available.†

What CoQ10 Does Inside the Cell

According to NIH StatPearls, CoQ10 is crucial for efficiently transferring electrons within the mitochondrial oxidative respiratory chain and producing adenosine triphosphate (ATP). It also functions as a potent fat-soluble antioxidant, protecting cell membranes from oxidative damage. In the mitochondria, CoQ10 shuttles between the reduced form (ubiquinol) and the oxidized form (ubiquinone), cycling electrons through the respiratory chain in a process that is continuous and essential. When CoQ10 is depleted, this shuttle slows, ATP output falls, and cells under high metabolic demand — heart muscle cells, neurons, oocytes — are most directly affected.

CoQ10 levels in the body peak around age 20 and then gradually begin to decline. A review published in PMC via the NIH confirms that CoQ10 distribution is not uniform among organs and that the highest concentration is observed in the heart, where it plays a central role in myocardial energy production. This concentration reflects the heart's extraordinary energy demand — it beats approximately 100,000 times per day without rest, and every contraction requires ATP generated by CoQ10-dependent mitochondria.

"Focus on total and holistic health where we're thinking about all these things in congruency with one another."

— Dominique Landry, Founder of Fit Enough

Why CoQ10 Matters Specifically for Women

Three points in a woman's life are particularly relevant to CoQ10 status.

Reproductive years and egg quality. Oocytes are among the most ATP-dependent cells in the body. The energy required for meiosis — the cell division that produces a mature egg — is enormous, and mitochondrial function in oocytes declines measurably with age. Research published in PMC via the NIH found that age-related decline in oocyte quality was accompanied by diminished expression of CoQ10 synthesis enzymes, and that supplemental CoQ10 restored mitochondrial function and reversed many of the age-associated oocyte deficits in animal models. A clinical study published in PubMed found that CoQ10 supplementation improved fertilization rates, embryo maturation rates, and embryo quality in women aged 31 and over undergoing IVF.†

Energy and perimenopause. As estrogen declines during the perimenopausal transition, cellular energy production efficiency decreases. CoQ10 supports the mitochondrial function that brain cells, muscle cells, and cardiac tissue depend on during this transition. Women experiencing fatigue, reduced exercise tolerance, or brain fog during perimenopause are often experiencing at least in part the compounded effect of declining CoQ10 and declining estrogen-supported mitochondrial activity.†

Statin use. Statins, medications used to lower cholesterol, inhibit the mevalonate pathway — the same pathway the body uses to synthesize CoQ10 endogenously. Women taking statins are at elevated risk of CoQ10 depletion, and whole-food CoQ10 sourcing can support dietary intake alongside any supplemental protocol their provider recommends.†

"If we teach women about their bodies and teach them what is actually normal versus what is abnormal, that education can make a real difference earlier on."

— Dr. Samantha Ess, ND, Naturopathic Doctor specializing in hormone health and fertility

Why Bovine Heart Is the Richest Whole-Food Source

The heart is the most metabolically active organ in the body. Because CoQ10 is produced by and concentrated in cells with the highest energy demands, the heart tissue of animals raised on pasture contains CoQ10 at concentrations far exceeding anything found in muscle meat. A 100g serving of raw beef heart provides approximately 11.3 mg of CoQ10, compared to 2.6 to 4.0 mg in beef muscle meat. Plant sources — broccoli, spinach, nuts — provide CoQ10 in amounts that are small by comparison and further limited by the lower bioavailability of fat-soluble compounds from plant matrices.

This is why traditional eating cultures that consumed nose-to-tail — using the heart, liver, kidney, and other organs routinely — maintained dietary CoQ10 intake that the modern muscle-meat-only diet does not replicate. Pink Stork's Beef Organ Complex, a whole-food blend of grass-fed liver, heart, kidney, and female-focused organ powders, includes bovine heart powder as a primary ingredient, supplying naturally occurring CoQ10 in the whole-food context the body evolved to process.† It is the first beef organ supplement in its category to earn the Clean Label Project Purity Award, following ISO-accredited third-party laboratory testing for more than 400 environmental and industrial contaminants, and is cGMP-certified with sourcing from 100% grass-fed, grass-finished, pasture-raised cattle with no added hormones.

Whole-Food CoQ10 vs. Isolated CoQ10 Supplements

Isolated CoQ10 supplements are available in both ubiquinol (reduced, active form) and ubiquinone (oxidized form) versions, and they have a documented clinical evidence base for specific applications including heart failure. Whole-food CoQ10 from bovine heart provides CoQ10 alongside the naturally occurring B vitamins, essential amino acids, and other nutrients that cardiac tissue concentrates — in the food matrix that the body evolved to process. For women building a whole-food nutritional foundation rather than targeting a specific therapeutic application, bovine heart powder provides CoQ10 in its native context, where it is accompanied by the cofactors that support its absorption and utilization.†

"Every Pink Stork product is not only backed by science, it's also covered in prayer. Beef Organ Complex exists because women deserve the nutrient density of the whole animal — not just what made it to the supermarket shelf."

— Amy Suzanne Upchurch, Founder and CEO of Pink Stork

For the broader context on whole-food nutrition and what modern diets have lost, see our guide on what women ate before modern supplements that we are missing now. For the iron absorption story from bovine liver, see why iron absorption rate matters for women.

Frequently Asked Questions

What does CoQ10 do for energy in women?

CoQ10 is a required component of the mitochondrial electron transport chain — the process by which cells convert food into ATP. When CoQ10 levels are adequate, mitochondria produce energy efficiently. When levels are low, ATP production slows and fatigue, reduced exercise tolerance, and cognitive sluggishness can follow. CoQ10 supports cellular energy production at the mitochondrial level, not through stimulant mechanisms.†

At what age do CoQ10 levels start declining?

CoQ10 levels peak around age 20 and begin a gradual decline that accelerates in the 40s and beyond. Statin use, chronic illness, and high oxidative stress can accelerate depletion at any age.

Is whole-food CoQ10 from bovine heart as effective as a CoQ10 supplement?

For women building a whole-food nutritional foundation, bovine heart powder provides CoQ10 alongside B vitamins and essential amino acids in a natural food matrix. Isolated CoQ10 supplements have a specific clinical evidence base for conditions like heart failure, where therapeutic doses are required. Both have their place; the choice depends on the specific goal and whether a therapeutic dose or whole-food foundation is the priority.†

Does CoQ10 support egg quality in women over 35?

Research published in the NIH's PMC database found that CoQ10 is involved in mitochondrial function in oocytes, and that CoQ10 levels decline with age in a pattern that coincides with the age-related decline in oocyte quality. A clinical study found improved IVF outcomes in women over 31 supplementing with CoQ10. Always consult your healthcare provider before starting any new supplement if you are trying to conceive.†

Can women on statins benefit from CoQ10 from food sources?

Statins inhibit the same metabolic pathway the body uses to synthesize CoQ10, and statin-associated CoQ10 depletion is well-documented. Dietary CoQ10 from whole-food sources supports intake alongside any supplemental protocol. Women on statins should discuss CoQ10 supplementation with their prescribing provider.†

Does Pink Stork Beef Organ Complex contain enough CoQ10 to make a difference?

The CoQ10 content per serving depends on the dose of bovine heart powder per capsule. Pink Stork Beef Organ Complex delivers bovine heart alongside four other organ powders as part of a whole-food nutritional foundation. For women seeking a therapeutic dose of isolated CoQ10 for a specific clinical application, an isolated supplement may be more appropriate alongside their organ complex routine. Consult your healthcare provider for guidance on your specific situation.†

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.