> ## Content Index > Fetch the complete content index at: https://blog.foodandfertility.com/llms.txt > Use this file to discover other available public pages before exploring further. # CoQ10 for Egg Quality - URL: https://blog.foodandfertility.com/coq10-for-egg-quality/ - Published: 2026-11-10T15:00:00.000Z - Updated: 2026-11-10T15:00:02.000Z - Description: Can CoQ10 improve egg quality? Here’s what the research shows, who may benefit, and what to know before you try it. - Author: Lorena Akerman MS, RD, CDN, CDCES - Tags: Fertility Supplements & Nutrients If you've searched for ways to support egg quality, you've probably come across CoQ10\. It's one of the most widely used fertility supplements. Here's what the research shows, and what it doesn't. ### What Is CoQ10? Coenzyme Q10 (CoQ10) is a compound your body makes on its own. It helps cells turn food into energy, and eggs need a lot of energy to mature. CoQ10 also acts as an antioxidant, which may help protect cells from damage. Your body makes less CoQ10 as you age. For these reasons, researchers have studied CoQ10 for egg health. ### Can CoQ10 Improve Egg Quality? The research is promising but still limited. Most studies measured how many eggs were retrieved and pregnancy rates, not egg quality directly. A 2020 review of five clinical trials looked at women going through fertility treatment, including [in vitro fertilization (IVF)](https://blog.foodandfertility.com/what-to-eat-during-ivf/). Women who took CoQ10 had higher pregnancy rates than women who didn't. The studies were small, and they showed no clear difference in live births or miscarriage. Newer reviews of people with diminished ovarian reserve or a low response to IVF found more eggs retrieved, fewer cancelled cycles, and higher pregnancy rates. Results for live birth and miscarriage have been mixed. The trials were small, and not all were well designed. Lab studies found that eggs matured with CoQ10 had fewer chromosome problems. Those studies added CoQ10 directly to eggs in a dish, though, which is not the same as taking a supplement. Fertility medical societies don't currently recommend CoQ10 for routine use. CoQ10 may help some groups, but it hasn't been proven to improve egg quality or lead to a baby. ### Who May Benefit Most? Most studies looked at people who: - Have diminished ovarian reserve (fewer eggs than expected for their age). Some of the strongest results were in women under 35 with diminished ovarian reserve. - Had a low response to ovarian stimulation in IVF - Have [PCOS](https://blog.foodandfertility.com/pcos-and-egg-development/) and are going through fertility treatment (based on a few small studies) Research is limited for people without a fertility diagnosis. ### How Much CoQ10 Is Used in Studies? Most studies used 600 to 1,200 mg a day, often 600 mg, for two to three months before treatment. In several studies, this was split into two or three doses (for example, 200 mg three times a day). One review found that doses as low as 30 mg a day may work, which suggests a higher dose isn't necessarily better. The best dose isn't known. CoQ10 is absorbed best with a meal that contains some fat. [Eggs mature over about three months](https://blog.foodandfertility.com/egg-health-and-nutrition/), and in studies, benefits were seen after two months or more of use. ### Ubiquinone or Ubiquinol? You'll see two forms on labels: - **Ubiquinone:** the form used in most fertility studies, and usually less expensive - **Ubiquinol:** the reduced form. Your body converts between the two. In one small study, ubiquinol raised blood CoQ10 levels more, but absorption studies are mixed, and most fertility studies used ubiquinone. Either form is reasonable. ### Can You Get CoQ10 From Food? Small amounts are found in: - Meat and poultry, especially organ meats - Fatty fish, such as salmon and sardines - Nuts, seeds, and soybeans These foods belong in a balanced eating pattern. A typical diet provides only a few milligrams a day, far less than the doses used in studies. ### Is CoQ10 Safe? CoQ10 is generally well tolerated. Some people get an upset stomach or have trouble sleeping, especially at higher doses. CoQ10 can interact with some medications: - **Warfarin (a blood thinner):** CoQ10 may make it work less well. Your provider may want to check your INR (a blood clotting test) when you start or stop CoQ10. - **Blood pressure and diabetes medicines:** CoQ10 may add to their effects. - **Statins (cholesterol medicines):** these can lower your body's CoQ10 levels. There's limited information on CoQ10 in pregnancy. Before starting CoQ10, talk with your healthcare provider or Registered Dietitian, and ask whether to keep taking it once you're pregnant. If you're in fertility treatment, tell your fertility clinic about every supplement you take. ### Choosing a Product The FDA doesn't review supplements for safety or effectiveness before they're sold. Look for a third-party seal, such as U.S. Pharmacopeia (USP), NSF International (NSF), or ConsumerLab. A seal means the product contains what the label says and has been checked for certain contaminants. It doesn't mean the product works. ### Key Takeaway CoQ10 may improve IVF outcomes such as number of eggs retrieved and pregnancy rates, especially for people with diminished ovarian reserve or a low response to IVF. The research is encouraging, but it isn't proof. Start with a [balanced eating pattern](https://blog.foodandfertility.com/the-fertility-plate/) and a [prenatal vitamin](https://blog.foodandfertility.com/prenatal-vitamins-fertility/). Then talk with your healthcare provider or Registered Dietitian about whether CoQ10 fits your plan. **Want a clear plan for egg health?** The Egg Health Course walks you through food, nutrients, and supplements in five simple steps. [Learn more](https://foodandfertility.com/egg-health.html?ref=blog.foodandfertility.com) **Related:** [How to Choose a Prenatal Vitamin When Trying to Conceive](https://blog.foodandfertility.com/prenatal-vitamins-fertility/); [Egg Health and Nutrition](https://blog.foodandfertility.com/egg-health-and-nutrition/); [Tests and Supplements Before Pregnancy](https://blog.foodandfertility.com/tests-and-supplements-before-pregnancy/)**Sources** 1. Florou P, et al. Does coenzyme Q10 supplementation improve fertility outcomes in women undergoing assisted reproductive technology procedures? A systematic review and meta-analysis of randomized controlled trials. *J Assist Reprod Genet.* 2020;37(10):2377-2387. 2. Xu Y, et al. Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial. *Reprod Biol Endocrinol.* 2018;16:29. 3. Lin G, Li X, Jin Yie SL, Xu L. Clinical evidence of coenzyme Q10 pretreatment for women with diminished ovarian reserve undergoing IVF/ICSI: a systematic review and meta-analysis. *Ann Med.* 2024;56(1):2389469. 4. Shang Y, Song N, He R, Wu M. Antioxidants and fertility in women with ovarian aging: a systematic review and meta-analysis. *Adv Nutr.* 2024;15(8):100273. 5. Schütz D, Lettorp KH, Olofsson IA, Hoffmann ER. Effect of micronutrients on fertility and aneuploidy rates in human conceptions: a systematic review and meta-analysis. *Reprod Biomed Online.* 2026;52(2):105261. 6. Zhang Y, Liu J, Chen X, Chen CYO. Ubiquinol is superior to ubiquinone to enhance coenzyme Q10 status in older men. *Food Funct.* 2018;9(11):5653-5659.