A brilliant supplement I have been taking for roughly 5/6 months now! No side effects - and hopefully a miracle happens soon in 2027 🙏🏼
Science backed support For Your Whole Motherhood Journey
Trusted by IVF clinics
Over 100K Servings Sold
Vegan
Trying for a baby
Pregnancy
4th Trimester
Women’s Health
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The One™ Female Fertility Formula
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Estimated delivery: Tue. 17 Nov - Thu. 19 Nov
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- 3-6 months before conception or if trying to conceive
- Whilst still on birth control (pills, coils, implants)
- Pregnant
- Postpartum Recovery
- Breastfeeding
- Egg Freezing, IVF
- Awaiting Implantation
💊 How to take
Take 2 capsules once a day with food, any meal you prefer.
Struggle to swallow pills?
Open the capsule and mix the contents into a drink or soft food.
Take The One every day as part of your daily routine for best results.
⏰ When to take
Take with a meal for best absorption. Take The One at least 2 hours apart from any medication, unless your doctor or pharmacist advises otherwise.
🌱 Before pregnancy
Start at least 3-6 months before you begin trying to conceive, continue into pregnancy and postpartum and breastfeeding.
Once you become pregnant, Continue taking them especially in the first trimester.
🤰 During pregnancy
We know nausea can make swallowing tablets difficult. If 2 capsules at once is hard, take 1 with each of your two main meals.
You can also open the capsules and mix the contents into a smoothie or soft food. If your nausea is severe or you can't keep food down, speak to your midwife or GP.
💉 During fertility treatment (IVF or egg freezing)
Many women start The One 3–6 months before stimulation and continue through egg collection, embryo transfer and into pregnancy. Please tell your fertility clinic you're taking it.
🤱 Postpartum and breastfeeding
Keep taking The One after your baby arrives and for as long as you're breastfeeding.
🌸 We focus on women. That's it.
One product, made for the most important time of your life.
We aren't a brand doing everything from powders, to proteins to probiotics, just one formula done properly.
A portion of our profits helping Period Poverty and advancing Women's health research.
👩⚕️ Founded by a Women's Health Team
Women's health gets dismissed, and waiting lists are long. So we did something about it.
The One was created by clinicians who treat reproductive health every day.
We've spoken to more women trying to conceive than any other brand - and we just get it!
✨ All-in-one nutrition
One daily formula for Reproductive development, Fetal development & Postnatal recovery and breastfeeding. Designed to fit into your busy life.
💪 Powerful ingredients
High dose choline (higher than most leading supplements), bioactive folate + high dose Vitamin D and more essential nutrients that you need.
🔬 Tested twice, independently
Every batch is 3rd party tested twice! It isn't legally required for supplements - but we have high standards.
📊 90% of women of reproductive age may be deficient in key nutrients.
💛 So we made the Fertility Formula to help you feel your best - in the most important time of your life.
🌸 Supports fertility and prepare your body for pregnancy and postpartum.
🩺 Formulated by a team of women's health doctors, embryologists and IVF doctors.
🔬 Each ingredient is research-backed and targeted to your reproductive needs.
⚠️ Cautionary advice
Do not exceed the recommended daily dose. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. If you are taking medication or are under medical supervision, consult your doctor before taking any food supplement. Keep out of the sight and reach of young children. Do not use if the seal is broken.
✅ Free from
Artificial colours, sugars, flavourings, preservatives and gluten.
Halal, Kosher and suitable for vegans.
✨ Over 90% of women in reproductive age may be deficient in key nutrients essential for conception, including folate, vitamin D and vitamin B12.
🧬 The full lifecycle of egg development takes around 90 days to mature.
💊 That’s why it is advise 3–6 months of supplements before trying to conceive.
🌱 The nutrients available in this window contribute to maternal tissue growth and normal fertility.
🚀 Starting now ensures your body has the time and building blocks to support your nutrition during pregnancy.
⏳ It takes 3–6 months to optimise your nutrition.
⚠️ 90% of women do not take the recommended supplements during early pregnancy.
🧬 Deficiencies take time to correct.
📆 Every cycle you wait can delay your opportunity to support reproductive health.
🚀 Starting early gives you the best chance.
Customer Reviews
Overall rating: 4.9 / 5 from 97 reviews.
Since taken The One vitamins I have fell pregnant. We had recurrent loss last year, since Nov we’ve struggled to conceive again. Started taking these vitamins 2 months before which believe played a vital role in getting pregnant! We just passed first trimester looking forward to welcoming our bundle of joy in May 2027.
I’d been taking a few different supplements so felt just taking this was easier to take. Haven’t had any issues and feel less tired whilst taking
It's my third month using it, yet I haven't seen the difference.
Have been taking for a month. I’m in a same sex relationship, so I won’t know the benefits till my IVF treatment in January, but here’s hoping I get a sticky baby this time 🤞.
Have been taking this for 6 months now at least and I’m hoping it’s making a difference for me :)
Ordered 3 and now on month 3. It's made a difference for sure, I'm happy to find a good quality supplement and will probably get some more once I'm done.
Started the one a few months ago now, I was advised of it from a family friend ... Read all the reviews they seemed really positive. I've been trying to conceive for years now with a few losses. So thought why not these reviews seem really positive people using them and getting caught naturally.... I just feel really disappointed in it to be honest feel as if I've wasted alot of money for no results ... The only thing it's done is brought on more periods which ... Is not what you're wanting when you're hoping for those 2 lines each month ...
So far good.. ive been taking it for a week and half and looking for forward to seeing what in store and how I feel in couple of weeks
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Fantastic supplement! It supports all my needs and wishes to aid my fertility journey. I love the fact it's made by a professional and backed by science 🫶🏼
Amazing product
Still haven’t got pregnant, but I am hopeful
I have been TTC for number 2 for a while and even had a failed ivf. Last month I started taking the one and fell pregnant. I can’t tell you whether it was the solely the one as there was many other factors that I switched up too but one thing for sure is that I struggle with big, smelly tablets but these aren’t like that at all. I now feel better knowing I’m taking everything I need for pregnancy- but must caveat at this, I take a DHA ( fish oil) supplement too!
I was using this for about a month before trying to get pregnant and I managed to get pregnant straight away! I would definitely recommend these supplements and the company is very responsive if you have any questions along the way - 10/10
So far so good.
Im happy with this supplements. Good product. Recommend.
I think its helped me feel less worried, since taking it.
Great product! Had ingredients I was looking for all in one supplement. I recommend for natural conception as I am now pregnant only after two months of taking the supplement.
What a brilliant product. So nice to know you’re getting everything you need in one place. Started taking it and got pregnant two months later! Great you can take in pregnancy too.
I have been using The One for a month now and already love it. I have PCOS and am in my thirties so hoping this will help me finally conceive. Also the customer service is fantastic and Rachel is so helpful x
Amazing product and has everything that you need.
Great supplement for women trying to get pregnant!
Quick delivery. I spent a bit of time researching products and came to the conclusion that it was worth the price tag due to the research involved in the product. I’m early in my journey to conceive and trying to get my body ready. I think it’ll be difficult to say whether it has any impact or not, but what I do know is that it seems to have all the ingredients in a safe format to help me optimise my body for pregnancy
Very easy to take , as a busy working women I struggle to prioritise taking supplements. The one has made my life easier, it’s also good on my gut. The packaging is discreet and well detailed.
The One tablets are easy to adopt into any routine. The packaging is beautiful and compact to pack when travelling. I started taking them recently and have just found out I’m pregnant. I reached out to the team to ask about taking the tablets when pregnant and they were so so helpful, offering me extra information and guidance :) I will continue to take these through my pregnancy.
I’m in my mid-thirties and after some fertility testing, I found out I have a significantly lower egg count than average for my age. My partner and I had been trying to conceive for nearly a year without success, and it was starting to take an emotional toll. When The One supplement was released, I decided to give it a try. I really liked that it was an all-in-one tablet and easy to take. I’ve since found out that I’m pregnant 🤍 I know there are always multiple factors involved, but I genuinely feel that taking The One was a major contributor for me. I’m so grateful I decided to try it
Great supplement for women trying to get pregnant!
Quick delivery. I spent a bit of time researching products and came to the conclusion that it was worth the price tag due to the research involved in the product. I’m early in my journey to conceive and trying to get my body ready. I think it’ll be difficult to say whether it has any impact or not, but what I do know is that it seems to have all the ingredients in a safe format to help me optimise my body for pregnancy
I have been using this product postpartum for beeastfeeding and maternal health. Been great. Love the packaging, great ingredients and actually curated by a women’s health specialist.
Started taking the one after I had a miscarriage as I felt I needed something different. The One felt like a good option and happy to have extra vitamins.
The capsule size is perfect for me. Delivery was quick and the packaging was discreet, so noone in my house knew what I ordered. Thanks The One.
I switched to The One after other supplements didn’t suit me. I took it when I found out I was pregnant and I haven’t had any issues.
The packaging is subtle and not obviously a fertility supplement, which I appreciated. I felt my energy levels and mood improved after a few weeks of taking it.
I used to take a few separate vitamins like Vitamin D, folic acid and another mulitvitamin, but I switched to The One as it has lots of vitamins all in one supplement so it feels more convenient.
The products feel premium and the website is easy to navigate. Everything from ordering to delivery was straightforward.
I take thyroid medication and had some questions regarding the product before purchasing it. Rachel was very helpful and answered my questions. She made the process feel less stressful.
We have been referred to the fertility clinic from our GP so I ordered these whilst we were waiting. I liked the ingredients and already feel like my tiredness and periods have improved. The ingredients look good so will continue on them
What sets the one apart?
Standard Prenatal Supplements
Clinically-studied 15+ nutrients
Founded by Women's Health Experts
Engineered for maximum absorption
Targeted nutrition to support reproductive health
Generic prenatal for pregnancy
Generic prenatal for pregnancy
Capsules per day
2 a day
14 a day
Convenient
All-In-One Nutrition
Multiple bottles and do not work in synergy
As seen in
Founded by a Women’s Health Doctor - For her own Journey
As a Women’s Health GP and PMOS patient, I understand the frustrations of long NHS waiting lists and women being dismissed. I felt the same whilst awaiting my own diagnosis of PMOS.
I was determined to do better for women in my capacity as a NHS doctor - I wanted to support women on their journey to motherhood.
We wanted to raise the standard for women’s nutrition beyond just the basics. 90% of women are depleted in key nutrients when trying to conceive.
Our all-female clinical team of embryologists, nutritionists and gynaecologists came together to produce The One.
We created this to the standard I’d trust for my patients and myself (I take it every day!).
We are on a mission to Redefine Fertility Care for the modern woman.
Love
Dr Ravina
MBBS BSc DRCOG MRCGP LOC PPMC
Backed by 500+ Clinical Trials
Supporting Women's Lives
*Based on 50 customer reviews.
0
Preferred taking The One over multiple supplements
0
Found minimal side effects
0
Noticed positive changes in their cycle
0
felt less tired and more energy
SUBSCRIBE & SAVE
Your Fertility Routine, Made Effortless
Consistency matters when supporting your reproductive health.
Subscribe to The One™ & give yourself one less thing to worry about.
Backed by leading female scientists
Sarah Laver
Lead Nutritionist
Sarah is our go-to Fertility Nutritionist for all things ingredients. She is a UK BANT- registered Nutritionist and previous Clinical Embryologist. Her background gives her extensive knowledge about IVF, egg freezing and preparing couples for fertility treatment.
Dr Ravina Bhanot
GP Specialised in Women’s Health
Dr Ravina Bhanot is a NHS GP Specialised in Women’s Health on a mission to improve women’s health and reproductive care.
She is a trusted voice on social media where she debunks myths and empowers people with health information while working with the BBC, Channel 4 and the Department of Health and Social Care.
Dr Ravina’s mission is to empower women to transform their health using evidence based information and the latest women’s health information.
Angela Heap
Fertility Nutritionist
Angela Heap is an experienced Fertility Nutritionist with over 18 years of clinical experience, and a member of the Association of Naturopathic Practitioners. Using an evidence based approach Angela leads a team of experts in fertility, pregnancy, IVF and fertility coaching.
Ms Srividya Seshadri
Consultant Gynaecologist & Fertility Doctor (MBBS, MD, FRCOG, MSC, FCRI)
Ms Seshadri is a Consultant Gynaecologist and one fo UK’s leading specialise in Reproductive Medicine and Surgery.
Her dedication to advancing reproductive medicine is further evidenced by her role as an Honorary Associate Professor at University College London and her membership on the Executive Committee of the British Fertility Society.
How long does it take The One™ to work?
Most fertility supplements take 3-6 months to show noticeable benefits.
We recommend you take The One™ for 3-6 months before you try to conceive and during the first trimester.
Can I continue taking this when I’m pregnant?
The One™ can be used during preconception, pregnancy and postpartum. Please speak to your doctor before starting anything new.
Can I take this alongside my 5mg folic acid supplement?
Yes you can, follow the advice of your doctor if they have recommended you take high dose folic acid 5 mg.
The One™ already contains the NHS recommended daily amount of active folic acid (Methylfolate 400 micrograms). Taking both together isn’t harmful, but may be more folate than you need. As folate is water-soluble, your body will excrete what it doesn’t need.
Does The One™ contain folic acid or methylfolate?
The One contains methylfolate (5-MTHF) - the active, bioavailable form of folate. This is the form the body uses directly and the dosage is in line with NHS pregnancy recommendations.
Can I take this alongside my multivitamin?
Yes - The One™ is suitable for Adults under 30 - whether you are trying to conceive, planning ahead or want to proactively support normal fertility
Can I track my order or change my subscription?
Yes change, pause or stop your subscription in your portal. https://theonelabs.co/apps/subscriptions
Can I take this if I am under 30 or over 40?
Yes - The One™ is suitable for Adults under 30 or over 40 - whether you are trying to conceive, planning ahead or want to proactively support normal fertility.
