Question 1

What is the recommended CoQ10 dosage for improving egg quality?

Accepted Answer

For fertility support and egg quality improvement, recommended CoQ10 dosages typically range between:

• 200–600 mg per day, depending on age and clinical needs¹

Kaneka Ubiquinol delivers 200 mg per daily serving (two 100 mg capsules), a commonly recommended dose in IVF clinics. This level is considered effective for enhancing mitochondrial energy, which is vital for egg maturation and embryo development.

Most people get only small amounts of CoQ10 from food, so supplements are often used during the 3-month preconception window to support egg and sperm development.

Always consult your fertility specialist before exceeding the standard dosage.

1. Xu Y, Nisenblat V, Lu C, Li R, Qiao J, Zhen X, Wang S (2018). Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial. PubMed.

Question 2

How does CoQ10 support sperm motility and health?

Accepted Answer

CoQ10, particularly in its ubiquinol form, may support male fertility by supporting:¹

• Mitochondrial energy production, which powers sperm motility
• Reducing oxidative stress, protecting sperm DNA and improving morphology
• Sperm count and vitality, especially in men with suboptimal semen parameters
• Membrane fluidity, contributing to better sperm-egg interaction

Learn more in our guide to male fertility and CoQ10 here.

Supplementing with a highly bioavailable form like Kaneka Ubiquinol CoQ10 is an easy way to top up your CoQ10 levels, which naturally decline with age.

1. Safarinejad MR, et al. Effects of the reduced form of coenzyme Q10 (ubiquinol) on semen parameters in men with idiopathic infertility: a double-blind, placebo-controlled, randomized study. Journal of Urology. 2012;188(2):526–531. doi:10.1016/j.juro.2012.03.131.

Question 3

When will I notice the benefits of Ubiquinol?

Accepted Answer

Everyone’s experience is different, and some people may not notice a specific change. This can depend on your diet, lifestyle, health status and the reason you are taking a CoQ10 supplement.

If you are taking Ubiquinol as part of a fertility journey, we generally suggest allowing at least three months to cover the egg maturation and sperm development cycles. This reflects the timeframes used in some fertility research; it is not a guarantee of a particular result or timeframe for any individual.

Follow the recommended daily intake on the label. If you are considering taking more than the stated daily intake, are undergoing fertility treatment, take medication, have an underlying health condition, or are pregnant or breastfeeding, speak to your GP, pharmacist, fertility specialist or another qualified healthcare professional before changing your intake.

If you have been taking Ubiquinol consistently for three months and are unsure whether to continue, discuss your individual circumstances with a qualified healthcare professional.

Question 4

Can I take more than 200mg Kaneka Ubiquinol?

Accepted Answer

CoQ10 has been researched at a range of daily doses in fertility settings. A 200 mg daily dose has been used in studies involving both men and women, while higher intakes of up to 600 mg daily have been studied in women undergoing IVF/ICSI.¹–³

Follow the recommended daily intake on the product label. If you are considering a higher dose, are undergoing fertility treatment, take medication, have an underlying health condition, or are pregnant or breastfeeding, seek advice from your fertility specialist, GP, pharmacist or other qualified healthcare professional before changing your intake.

If taking more than one capsule daily, divide the dose across the day.

1. Safarinejad MR, et al. J Urol. 2012;188(2):526–531.
2. Giannubilo SR, et al. Antioxidants (Basel). 2018;7(10):141.
3. Xu Y, et al. Reprod Biol Endocrinol. 2018;16:29.

Question 5

What are the benefits of Ubiquinol CoQ10?

Accepted Answer

Ubiquinol is the reduced form of coenzyme Q10 (CoQ10), a compound found naturally in the body. It is a popular choice for people who are preparing for pregnancy or following a wider preconception routine.

CoQ10 has been explored in fertility research involving both men and women, including research into semen parameters, oocytes and assisted-conception settings. Scientists have investigated CoQ10 because of its role in cellular processes. However, research findings do not mean that a food supplement will have the same effect for every individual or guarantee a fertility outcome.

Fertility can be influenced by many factors, including age, medical history, lifestyle and the reason for any difficulty conceiving. If you are undergoing fertility treatment, have concerns about fertility, take medication, have a health condition, or are considering taking more than the recommended daily intake, speak to a fertility specialist, GP, pharmacist or other qualified healthcare professional.

Question 6

Are there side effects to taking Ubiquinol?

Accepted Answer

Ubiquinol is generally considered safe when taken within recommended doses. It is a naturally occurring substance in the body and is also found in some foods. However, as with any supplement, some people may experience side effects.

The most commonly reported side effects of ubiquinol are mild digestive symptoms such as nausea, diarrhoea, and stomach upset. These symptoms can usually be alleviated by taking the supplement with food or reducing the dosage.

We don't recommend taking ubiquinol during pregnancy or while breastfeeding, as there isn't yet enough research to confirm its safety at these stages. If you are undergoing fertility treatment or any other medical treatment, check with your clinic or healthcare professional before starting.

Question 7

What is Kaneka Ubiquinol and how does it work?

Accepted Answer

Ubiquinol is the active, reduced form of Coenzyme Q10, also known as CoQ10, a naturally occurring compound involved in energy production and known for its antioxidant properties. CoQ10 exists in two forms in the body: ubiquinone, which is the oxidised form, and ubiquinol, which is the active antioxidant form.

Ubiquinol is known for its role in energy production within the mitochondria, the powerhouses of our cells. Mitochondria are important for healthy eggs and sperm, and CoQ10 may help fuel their function while protecting against oxidative stress. Learn more here.

Kaneka Ubiquinol® is a premium form of ubiquinol. Ubiquinol is naturally delicate and oxidises easily, so Kaneka uses a natural yeast fermentation process to create a stable form that is identical to the ubiquinol your body makes.

Question 8

Which is the best CoQ10 for fertility?

Accepted Answer

For fertility, many specialists prefer ubiquinol, the active, body-ready form of CoQ10 that is more easily absorbed than standard ubiquinone CoQ10. This is because eggs and sperm are highly energy-dependent and rely on healthy mitochondria, which use CoQ10 to produce energy and protect against oxidative stress.

Kaneka Ubiquinol is a patented form of ubiquinol used in fertility clinics worldwide and is often chosen over generic CoQ10 because of its higher bioavailability and strong safety data. By providing a well-absorbed form of CoQ10, it is designed to support egg and sperm quality in the crucial months before conception or IVF. Learn more about the research here.

Because ubiquinol is a fat-soluble nutrient, many fertility specialists prefer well-formulated softgel capsules in oil, like Kaneka Ubiquinol, to support optimal absorption.

Question 9

Why does Zita West use Kaneka Ubiquinol over standard CoQ10?

Accepted Answer

Our CoQ10 supplement uses Ubiquinol because it is more bioavailable and better suited to women over 35, when egg energy metabolism declines. Kaneka Ubiquinol is one of the world’s most researched forms and trusted in fertility clinics worldwide.

Question 10

Why choose Kaneka Ubiquinol?

Accepted Answer

We recommend Kaneka Ubiquinol because it is:

Clinically Researched Bioavailability
Kaneka Ubiquinol has been shown in studies to be significantly more bioavailable than ubiquinone, helping deliver CoQ10 benefits faster and more effectively. See the full research here.

Used in Fertility Care Settings
This form of CoQ10 is used and recommended in leading IVF clinics for individuals looking to support reproductive health.

Clean, Transparent Formulation
Every batch is tested for purity and quality. Batch certificates can be downloaded.

Question 11

Can CoQ10 improve egg quality?

Accepted Answer

Research suggests that CoQ10 may help improve egg quality, particularly in women over the age of 35. CoQ10 may help reduce oxidative stress, which can damage eggs and impact fertility.

Question 12

Is ubiquinol better absorbed than regular CoQ10?

Accepted Answer

Yes. Research indicates Kaneka Ubiquinol has significantly higher absorption levels. Learn more here.

Question 13

What is the difference between Ubiquinol and Ubiquinone?

Accepted Answer

Ubiquinol and ubiquinone are two forms of Coenzyme Q10, also known as CoQ10. CoQ10 is a naturally occurring compound, made by the body, that is involved in energy production and is also known for its antioxidant properties. Ubiquinol is the active, reduced form of CoQ10, while ubiquinone is the oxidised form.

Ubiquinol is often considered better than ubiquinone because it is more easily absorbed by the body and can provide more immediate benefits. This is because ubiquinol is already in its active form, while ubiquinone needs to be converted by the body before it can be used. As we age, our bodies may become less efficient at converting ubiquinone to ubiquinol, which can reduce the amount of active CoQ10 available in the body.

Studies have shown that taking ubiquinol can help increase CoQ10 levels in the body more effectively than ubiquinone. Additionally, ubiquinol may provide additional antioxidant benefits beyond those of ubiquinone, which can help protect cells from damage and support overall health.

For fertility support, particularly in women over 35 or men with sperm quality concerns, ubiquinol is often the preferred form, offering up to 70% greater bioavailability and faster cellular support.¹

1. Langsjoen PH, Langsjoen AM. Comparison study of plasma coenzyme Q10 levels in healthy subjects supplemented with ubiquinol versus ubiquinone. Clin Pharmacol Drug Dev. 2014;3(1):13-17.

Question 14

How long should I take Kaneka Ubiquinol before trying to conceive or IVF?

Accepted Answer

We recommend starting Kaneka Ubiquinol at least 3 months before trying to conceive, especially for women over 35 or those preparing for IVF. This gives the body time to build up mitochondrial energy support for egg development.

Question 15

How much CoQ10 should I take when trying to conceive?

Accepted Answer

CoQ10 is one of the most researched supplements for female fertility, especially when it comes to egg quality. The general recommended dose is 200mg to support general fertility, but recent studies suggest the optimum dose is up to 600mg for individuals undergoing IVF or older individuals, and this higher dose should only be taken if advised by your clinic or healthcare practitioner. Read our guide to how much CoQ10 to take when trying to conceive.

Question 16

Can I combine it with other Zita West supplements?

Accepted Answer

Yes. It pairs well with products like Vitafem, Vitamen or Vital DHA for comprehensive reproductive support.

Question 17

Is Ubiquinol safe to take daily?

Accepted Answer

Ubiquinol is generally safe to take daily for most adults when taken as directed. However, it is always important to talk to a healthcare professional before starting any new supplement regimen to ensure it is safe and appropriate for you. They can advise you on the appropriate dosage and potential interactions with any medications you may be taking.

Question 18

Are there any allergens?

Accepted Answer

Yes. Kaneka Ubiquinol contains soya (as soy lecithin). It is free from gluten and dairy.

Question 19

Can I take Kaneka Ubiquinol during IVF treatment?

Accepted Answer

Yes. Kaneka Ubiquinol CoQ10 is commonly taken while preparing for IVF, and it is included in several of our IVF support packs. Studies looking at CoQ10 before IVF have usually started it around two months before treatment.¹ Where possible, we recommend starting at least three months before egg collection, to cover the 90 day egg maturation window.

Always tell your clinic about every supplement you take, including your CoQ10 dose, as some clinics recommend a higher dose than our standard 200mg. We recommend stopping Kaneka Ubiquinol CoQ10 after embryo transfer unless your clinic advises otherwise, as there is not yet enough research on its use in pregnancy. CoQ10 is not a fertility treatment and cannot guarantee IVF success.

1. Xu Y et al., 2018. Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial. Reproductive Biology and Endocrinology, 16, 29.

Question 20

Can both men and women take Kaneka Ubiquinol?

Accepted Answer

Yes. Kaneka Ubiquinol CoQ10 is suitable for both women and men who are trying to conceive, whether naturally or through assisted conception. CoQ10 has been studied in relation to egg quality in women and semen parameters in men, as both eggs and sperm rely on mitochondrial energy.

The recommended dose is the same for both partners: 200mg a day (two capsules) with food, ideally for at least three months to cover the 90 day egg maturation window and the 74 day sperm development cycle. It is not recommended during pregnancy or breastfeeding. If either of you takes prescribed medication, check with your GP or pharmacist first.

Question 21

What should I do if I miss a dose?

Accepted Answer

If you miss a dose, simply take your next dose as usual. There's no need to double up.

Question 22

Is Kaneka Ubiquinol particularly relevant after age 35?

Accepted Answer

CoQ10 is often discussed for women over 35 because the body's own production of CoQ10 is thought to decline with age. Egg quality also naturally declines with age, partly due to changes in the energy supply within eggs. Much of the research on CoQ10 and egg quality has focused on women with reduced ovarian reserve or those having IVF.¹ ²

Kaneka Ubiquinol CoQ10 may be particularly relevant if you are over 35 and trying to conceive or preparing for IVF, but it is suitable at any adult age, and for men too. It cannot reverse age related changes in fertility or guarantee conception. If you are over 35 and have been trying to conceive for six months or more, it is worth speaking to your GP.

1. Xu Y et al., 2018. Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial. Reproductive Biology and Endocrinology, 16, 29.
2. Florou P et al., 2020. Does coenzyme Q10 supplementation improve fertility outcomes in women undergoing assisted reproductive technology procedures? A systematic review and meta-analysis of randomized-controlled trials. Journal of Assisted Reproduction and Genetics, 37, pp.2377-2387.

Question 23

Are these capsules easy to swallow?

Accepted Answer

Yes, the capsules are designed for daily use and should be taken with water.

Question 24

How does the Zita West subscription work?

Accepted Answer

When you subscribe to any eligible product, you save on every order. Subscriptions are managed through your account, where you can update your delivery frequency, swap, or cancel at any time. Subscribing is a convenient way to maintain a consistent supplement routine, which matters when you are supporting your fertility or pregnancy over a three-month period or longer.

Question 25

Do you offer free UK delivery?

Accepted Answer

Yes. We offer free standard delivery on all UK orders over £60. Orders under £60 are charged at £4.95. You can see all available delivery options and charges at checkout before you place your order.

Question 26

How long will my UK order take to arrive?

Accepted Answer

UK orders are usually dispatched within 24 hours of being placed. Once dispatched, standard delivery typically takes 1 to 3 working days.

Question 27

Do you ship internationally?

Accepted Answer

Yes, we ship to many countries worldwide, including the EU, USA, Canada, and further afield. International delivery timescales and charges vary by destination and are shown at checkout. EU customers should be aware that some orders may be subject to additional customs checks, which can occasionally cause delays. For any queries about international delivery, contact our customer service team at customerservice@zitawestproducts.co.uk.

Question 28

Will my order arrive in discreet packaging?

Accepted Answer

Yes. All orders are dispatched in plain, unmarked outer packaging with no reference to Zita West on the outside. The only brand reference is on the packing slip included inside the parcel.

Question 29

Are Zita West supplements third-party tested?

Accepted Answer

Yes. Our supplements undergo independent third-party testing, and batch certificates are available on our website so you can check the quality and purity of every batch we produce. We believe that transparency around testing is part of what it means to be a supplement brand you can trust.

Question 30

Are there other ways to save on my order?

Accepted Answer

Yes. In addition to the subscription discount, you can save when buying product bundles, or mix and match three or more individual supplements for a 10% saving.

Question 31

Can I change my delivery date, swap, or cancel my subscription?

Accepted Answer

You can manage your subscription by logging into your Zita West account and selecting Subscriptions. From there you can update your next delivery date, delay an upcoming order, swap to a different product, or cancel at any time. If you need a hand with any of these, get in touch with our customer service team at customerservice@zitawestproducts.co.uk or call 01280 707400 and we will be happy to help.

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Kaneka Ubiquinol

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What's Inside Our Kaneka Ubiquinol - Premium CoQ10 for Egg & Sperm Quality and Fertility