Coenzyme Q10 (CoQ10) has gained attention for its potential benefits, which range from supporting heart health to enhancing fertility. However, does it truly merit its popularity? Here’s what the experts have to say…
What is Coenzyme Q10?
CoQ10 is a vital antioxidant that plays a crucial role in energy production within cells, as well as maintaining the health of various tissues and organs, according to registered nutritional therapist Emily Barker. It is predominantly found in the heart, liver, and kidneys and boasts anti-inflammatory properties. However, CoQ10 levels decline with age, as well as due to certain illnesses and medications like statins, prompting discussions about supplementation.
So should I be supplementing?
The answer varies. Most healthy individuals consuming a balanced diet should obtain adequate amounts of CoQ10 from their food choices. Good sources include oily fish, whole grains, and organ meats like liver. Conversely, those following a plant-based diet may have lower CoQ10 levels.
“As with many dietary supplements, the most significant health benefits are usually observed in individuals who have a deficiency—though primary CoQ10 deficiency is quite rare,” notes registered dietitian Sammie Gill.
What about the claims that it can manage certain health conditions?
There is increasing interest in the potential role of CoQ10 in managing various health conditions, according to Dr. Gill. Most studies conducted thus far have involved individuals with specific health issues. However, the evidence is stronger for some conditions than others.
“Research has included lab tests, animal studies, and human trials,” Dr. Gill adds. “CoQ10 has shown promise as a complementary therapy for managing certain health conditions.”
Conditions like Type 2 diabetes, migraines, chronic fatigue syndrome, polycystic ovary syndrome (PCOS), and heart failure may benefit. Sinceissues like stress and inadequate sleep can heighten the demand for antioxidants, adds Barker, a supplement might be beneficial, particularly for those engaged in regular physical training.
A study from Japan indicated that CoQ10 supplementation in healthy individuals reduced feelings of fatigue and enhanced performance during exercise bike sessions.
What about the fertility claims?
There is some foundational support for fertility claims, but research is still limited. More studies suggest benefits prior to conception rather than during pregnancy. “Animal studies indicate CoQ10 might enhance fertility, especially in conditions like ovarian dysfunction or PCOS, by managing oxidative stress and reducing free radical levels,” states Dr. Gill.
“In men, research indicates that CoQ10 may positively affect sperm quality, quantity, and motility.” Barker, who focuses on couples’ fertility, commonly advises her clients experiencing fertility issues, particularly those over 35, to consider supplementation.
“CoQ10 is crucial for mitochondrial energy production,” she explains, noting that egg cells have a high concentration of mitochondria due to reproductive energy demands. With advancing age, egg cells become less efficient in energy production, and CoQ10 levels within them significantly decline.
Supplementing may help replenish these levels, potentially improving egg quality and thereby increasing the chances of conception.
Indeed, a recent meta-analysis found that CoQ10 significantly increased clinical pregnancy rates among women with diminished ovarian reserve undergoing IVF treatment.
And is it safe?
The British Heart Foundation suggests discussing CoQ10 with your doctor if you’re taking blood pressure medications or the blood thinner warfarin, given potential interactions. Generally, however, Dr. Gill states that CoQ10 is well tolerated, with side effects such as stomach upset, nausea, or insomnia occurring rarely—primarily with higher doses.
