The Role of Mitochondria and Ubiquinol in Men’s Reproductive Wellness

Executive Takeaways

1. Ubiquinol, the active antioxidant form of CoQ10, supports mitochondrial function, which is closely linked to sperm development and motility.
2. Mitochondrial energy production plays an important role in sperm function, influencing motility and overall sperm quality.
3. Through its antioxidant activity, Ubiquinol helps maintain oxidative balance, which is associated with healthy sperm parameters in men.

Mitochondrial function is closely linked to the health and performance of sperm cells. Ubiquinol, the active antioxidant form of coenzyme Q10 (CoQ10) that the body naturally produces, plays a role in this process. It supports the cellular energy production needed for sperm motility, helps maintain mitochondrial function, and provides antioxidant protection that helps maintain oxidative balance—factors associated with healthy sperm number and quality.

In this article, Dr. Evans examines the relationship between mitochondrial function and men’s reproductive health and how ubiquinol supports these processes.

Nearly every aspect of sperm health is influenced by mitochondrial function, from development to motility, which reflects how closely cellular energy production and reproductive function are linked. Human studies have identified associations between mitochondrial performance and sperm motility, count, morphology, and DNA integrity.^1-3

Mitochondria are essential throughout spermatogenesis, the process of developing and maturing sperm, which requires large amounts of adenosine triphosphate (ATP), the cell’s main source of energy, supporting cellular processes involved in sperm development. Mitochondria contribute to each stage of the process by supporting cell division, organelle remodeling, regulation of oxidative stress, cell signaling, and steroid hormone production.^1-3

Sperm also rely on ATP for motility to fuel the whip-like motion of the tail that allows the sperm to swim toward the egg. To meet the high energy requirements of this motion, the number of mitochondria increases as the sperm matures, and they become concentrated in the midpiece of the sperm at the top of the tail. In fact, mitochondria are one of the few organelles that are maintained in mature sperm because of the essential function of motility in fertilization.^1,2

Beyond cellular energy production, proper mitochondrial function contributes to the overall health and structural integrity of the sperm cell itself, including the DNA housed in the head and the membrane that surrounds and protects the cell, both of which are important for normal sperm function.⁴ This membrane helps safeguard genetic material and enables sperm to successfully interact with the egg.

Oxidative stress can affect mitochondrial function and influence sperm development and quality by disrupting energy production and the integrity and function of membranes and DNA.^2,5 This reflects the bidirectional relationship between oxidative balance and mitochondrial health. Research has found that men with higher oxidative stress markers in seminal plasma tend to have lower levels of ubiquinol. Lower seminal ubiquinol levels are associated with suboptimal sperm parameters, including reduced sperm count and motility.^6,7

To understand how oxidative stress develops, it helps to look at what happens during normal mitochondrial energy production, because this is where the process begins at a cellular level. ATP is generated within the mitochondrial electron transport chain (ETC). However, some electrons escape during transfer and react with oxygen, forming a superoxide, a highly unstable and reactive free radical that is a primary form of reactive oxygen species (ROS).^8,9 ROS seek stability by taking electrons from healthy molecules. These interactions can affect cellular structures, including mitochondrial membranes, the ETC, and nuclear and mitochondrial DNA.^10,11 Left unchecked, this damage can lead to an increase in ROS within the mitochondria.⁸

Antioxidants like ubiquinol keep ROS in check by neutralizing free radicals, which plays a part in maintaining cellular integrity and homeostasis. Oxidative stress occurs when there is an imbalance between the production of ROS and the body’s antioxidant defenses. While some ROS are necessary for sperm maturation and signaling, excess ROS from oxidative stress can overwhelm antioxidant defenses and impair sperm function.²

Lifestyle and environmental factors—such as diets low in nutrients, exposure to pollution and UV rays, tobacco, and alcohol consumption—contribute to oxidative stress. In addition, aging plays a role, as natural antioxidant mechanisms and ubiquinol levels decline.

Ubiquinol plays a key role in the ETC and contributes to the body’s antioxidant defense, which is tied to mitochondrial function and cellular homeostasis. Ubiquinol’s lipid-soluble nature allows it to reach the lipid-rich membranes of reproductive cells and mitochondria, where it helps neutralize reactive oxygen species, supporting mitochondrial integrity and function.^12-14

However, with age, the body’s ability to convert ubiquinone to ubiquinol declines, leading to lower blood ubiquinol levels. This decrease represents a change in the body’s ability to maintain antioxidant capacity. The combination of the natural decline in antioxidant capacity and the cumulative effect of environmental stressors can increase oxidative stress, which, over time, damages mitochondria and reproductive cells.

Kaneka  biquinol^® is a patented Ubiquinol ingredient that supports men’s reproductive health through its antioxidant properties, with relevance to the maintenance of healthy sperm function at the cellular level. When taken as a supplement, Ubiquinol offers a distinct advantage in bioavailability compared to CoQ10 (ubiquinone).
Kaneka Ubiquinol^® has been shown to be twice as well absorbed as conventional CoQ10.¹⁵

Ubiquinol’s enhanced bioavailability becomes increasingly significant with age, particularly as endogenous conversion becomes less efficient. Research demonstrates that 200 mg of Kaneka Ubiquinol^® increases ubiquinol levels by approximately eight times compared to baseline in healthy adults when taken daily for at least 30 days.¹⁶ Unlike conventional CoQ10 supplements, Kaneka Ubiquinol^® requires no conversion in the body to perform its antioxidant function,^17,18 making it readily available to provide protection at the cellular level.

Kaneka Ubiquinol^® supplementation helps maintain oxidative balance and supports the structural integrity of men’s reproductive cells, which aligns with sperm quality parameters observed in research. Clinical research using
Kaneka Ubiquinol^® has shown measurable changes in sperm quality markers—including motility, count, and morphology—in men with suboptimal sperm parameters.

In an open-label human study involving men with low sperm count and motility, daily supplementation with 150 mg of Kaneka Ubiquinol^® for six months was associated with a 53% increase in total sperm count and a 26% improvement in overall motility.¹⁹ The number of rapidly motile sperm increased, while non-motile sperm decreased. Additional research also reveals improvements in sperm morphology of up to 24%.²⁰

The link between mitochondrial function, oxidative stress, and sperm quality underscores the potential of Kaneka Ubiquinol^® supplementation in supporting men’s reproductive wellness, and reflects a broader shift toward understanding reproductive health at the cellular level. From a clinical perspective, this is less about a single outcome and more about supporting the cellular environment that underpins sperm function.

Kaneka Ubiquinol^® is backed by more than 50 years of ubiquinone and ubiquinol testing and research, 100 clinical studies using Kaneka Ubiquinol^®, and 18 years of positive consumer experience with Kaneka Ubiquinol^® supplementation.

As the only manufacturer of Ubiquinol in the United States, Kaneka Nutrients delivers the quality, safety, and performance that supplement brands and health professionals can rely on.

Partner with Kaneka Nutrients to strengthen your supplement portfolio with a clinically validated ingredient that addresses key concerns in the area of men’s reproductive wellness.

To learn more, read our white paper, The Antioxidant Edge: The Impact of Kaneka Ubiquinol^® on Reproductive Health.

A respected voice in functional and integrative medicine, Dr. Evans contributes to advancing foundational health through education, clinical leadership, and international engagement. His focus on hormone health and prenatal development reflects a commitment to evidence-based, science-led innovation.