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CoQ10 and reproductive energy metabolism
Coenzyme Q10 is involved in cellular energy production and antioxidant protection. These functions are relevant for reproductive cells such as sperm and oocytes, which require substantial mitochondrial energy for maturation and function.
Research on CoQ10 and fertility mainly focuses on oxidative stress and mitochondrial function in reproductive tissues.
CoQ10 and male fertility research
In male fertility research, CoQ10 supplementation has been associated with improvements in sperm motility, sperm concentration and normal sperm morphology. These effects are often linked to improved mitochondrial energy production and reduced oxidative stress in sperm cells.
CoQ10 is a highly lipophilic molecule and oral absorption can be limited. Plasma CoQ10 concentrations are therefore often used as a practical indicator in supplementation studies. Baseline plasma levels are typically around 0.6–1 mg/l, while supplementation may increase levels above 2 mg/l depending on formulation and dosage.
Coenzyme Q10 and fertility have been studied because of the molecule’s role in cellular energy metabolism and antioxidant protection.
Research has mainly focused on mitochondrial energy metabolism and oxidative stress in reproductive tissues.
Q10 science on Male Fertility
The exogenous administration of coenzyme Q10 is effective in improving sperm kinetic features in patients affected by idiopathic asthenozoospermia (Balercia 2009).
A randomized controlled study with 212 infertile men indicated that oral supplementation with Q10 significantly improves semen parameters (sperm density and motility) compared with that of placebo (Safarinejad 2009).
Q10 supplementation improves semen quality with a beneficial effect on pregnancy rate (Safarinejad 2011).
In patients with early chronic Peyronie’s disease, CoQ10 therapy leads to plaque size and penile curvature reduction and improves erectile function (Safarinejad 2010).
A systematic and qualitative review concluded that Q10 is one of the most thoroughly studied nutraceuticals showing a positive impact on sperm parameters and/or birth rates (Kuchakulla 2019).
Q10, alone or in combination with other antioxidant molecules, has a beneficial effect on seminal quality, especially regarding sperm motility. Indirect indications derive from an improvement in the antioxidant capacity of the seminal fluid and the chromatin integrity of spermatozoa. Improvements in semen parameters begin after 3–6 months of treatment but disappear when supplementation is discontinued (Salvio 2021).
Coenzyme Q10 and reproductive cell energy
A mature human egg is the largest cell in the female body. It has the largest amount of mitochondria in any cell and needs the most energy! Egg cells have around 100 000 mitochondria. This buffer will be used during cell division to pass on and empower immediately the first 100 daughter cells.
All human egg cells are present at birth. So they are the oldest cells in the body. The female reproductive system is the fastest aging organ in humans, far quicker than the male reproductive system. It relates to mitochondria and to aging. The importance of Q10 in female fertility is a new and exciting field of research.
High follicular fluid Q10 level is associated with optimal embryo morphokinetic parameters and higher pregnancy rates. These results might be supportive of the usage of Q10 as a supplement in women undergoing in vitro fertilization (Akarsu 2017).
Q10 improves oocyte and cumulus cells quantity and quality, by improving the mitochondrial metabolism in females of advanced maternal age (Ben-Meir 2015).
Q10 may improve follicular fluid oxidative metabolism and oocyte quality, especially in over 35-year-old women (Giannubilo 2018).
Pretreatment with Q10 improves ovarian response to stimulation and embryological parameters in young women with poor ovarian reserve in IVF-ICSI cycles (Xu 2018).
Compared with placebo or no-treatment, oral supplementation with Q10 can increase clinical pregnancy rates in women undergoing Assisted Reproductive Technology procedures (Florou 2020).