Best Supplements for Egg Quality in the UK: What Does the Evidence Say?
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If you're looking for the best supplement for egg quality in the UK, our pick is Ovare CORE3 — a high-strength, doctor-created, preconception supplement providing 450mg CoQ10, 4,000 IU vitamin D3 and 1,000mcg methylfolate in just one capsule a day.
Why these three? CoQ10 is one of the most extensively researched supplements in female fertility, while vitamin D has been studied in relation to reproductive and IVF outcomes, and folate is an essential preconception nutrient.
No supplement can guarantee improved egg quality or pregnancy, but here's what the evidence actually shows.
1. CoQ10 for egg quality
Coenzyme Q10 (CoQ10) plays an important role in mitochondrial energy production. This is particularly relevant to egg cells, which have substantial energy requirements during maturation, fertilisation and early embryo development.
CoQ10 supplementation has been investigated in women undergoing fertility treatment. A randomised controlled trial in women with decreased ovarian reserve reported improvements in several ovarian-response and embryological outcomes following CoQ10 pretreatment before IVF/ICSI.
Systematic reviews and meta-analyses have also reported potentially favourable effects on some reproductive outcomes, although this doesn't prove that CoQ10 directly improves an individual woman's egg quality.
Dose matters. Fertility studies have used a range of CoQ10 doses, including several hundred milligrams per day. When comparing supplements, check the actual daily dose rather than simply whether CoQ10 appears on the label.
CORE3 provides 450mg CoQ10 per capsule.
2. Folate and methylfolate
Folate is an essential preconception nutrient, with an important role in cell division and maternal tissue growth during pregnancy.
CORE3 provides 1,000mcg methylfolate (5-MTHF) as calcium L-methylfolate. Unlike folic acid, which undergoes several metabolic steps before becoming the biologically active form used by the body, 5-MTHF is already a biologically active form of folate.
This doesn't mean folic acid is ineffective. It has extensive evidence behind it, and UK guidance recommends 400mcg folic acid daily when trying to conceive and during the first 12 weeks of pregnancy.
Some women require a prescribed higher dose of folic acid. If you've been prescribed folic acid, don't stop or replace it with methylfolate without discussing this with your healthcare professional.
3. Vitamin D and fertility
Vitamin D has attracted significant interest in reproductive medicine. Vitamin D receptors are found in reproductive tissues, including the ovaries and endometrium, and researchers have investigated whether vitamin D status is associated with fertility-treatment outcomes.
A systematic review and meta-analysis involving approximately 2,700 women undergoing assisted reproductive treatment found that women who were vitamin-D replete had higher odds of clinical pregnancy and live birth than women who were vitamin-D deficient or insufficient.
Other research has also reported associations between sufficient vitamin D status and IVF outcomes, although results haven't been completely consistent.
CORE3 provides 4,000 IU (100mcg) vitamin D3, derived from lichen.
Best egg quality supplement UK: our pick
Ovare CORE3
For women looking for a high-strength fertility supplement without taking multiple capsules every day, our pick is CORE3.
Each one-capsule daily serving provides:
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450mg CoQ10 — high-purity, yeast-fermented ubiquinone
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4,000 IU vitamin D3 — vegan, lichen-derived D3
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1,000mcg methylfolate — calcium L-methylfolate (5-MTHF)
CORE3 is doctor-created, made in the UK, vegan and halal, with all three ingredients delivered in just one capsule per day.
Rather than creating another broad multivitamin containing small amounts of dozens of ingredients, CORE3 focuses on three carefully selected nutrients at high doses.