4.9/5 1000+ happy customers 
It's my third month using it, yet I haven't seen the difference.
The One™ Female Preconception Supplement
The One™ Female Preconception Supplement
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Estimated delivery: Mon. 19 Oct - Wed. 21 Oct
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Founded by a Women’s Health Doctor - For her own fertility
“When I was diagnosed with PCOS, I was so worried about my fertility so I was determined to do better. We created this to a high standard and I know this because I take it myself everyday.”
★★★★★
Everything you need in one place.
"After trying for 2 years, I got pregnant after 2 months! Easy to take, with everything you need in one place."
Anna M
Verified Customer
★★★★★
I'm 37 and got a recent positive test
"I have recently found out and couldn't be happier."
Laura T
Verified Customer
🌸 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 help Female Hygiene 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 NHS doctors and specialists who support women planning a family every day.
We’ve listened to thousands of women on this journey - and we get it.
✨ All-in-one nutrition
One daily formula for before, during and after pregnancy. 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.
🔬 Independently Tested, twice
Every batch is 3rd party tested twice! It isn't legally required for supplements - but we have high standards.
📊 90% of women preparing may be deficient in key nutrients.
💛 So we made the The One Formula to help you feel your best - in the most important time of your life.
🌸 Supports reproduction and prepares your body for pregnancy and postpartum.
🩺 Formulated by a team of women's health doctors, embryologists and gynaecologists.
🔬 Each ingredient is chosen based on published research.
- Planning a family in the next 3–6 months
- Getting ready to start trying
- Expecting
- For the 12 months after birth
- Feeding a newborn
- On a clinic-supported journey to parenthood
💊 How to take
Take 2 capsules once a day with food, any meal you prefer.
Prefer not to swallow capsules?
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.
🤰 Once you're expecting
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.
💉 If you're under a specialised clinic
Many women start The One 3–6 months before their clinic plan begins and continue throughout. Please let your clinic know you’re taking it.
🤱 After birth and feeding a newborn
Keep taking The One in the months after birth and for as long as you’re feeding your baby.
⚠️ 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.(1)
🧬 The full lifecycle of egg development takes around 90 days to mature.
💊 That’s why it is advise 3–6 months of supplements before planning a family or before treatment.
🌱 The nutrients available in this window contribute to maternal tissue growth and normal fertility.¹
🚀 Starting now ensures your body has the time and building blocks to support your nutrition during pregnancy.
As seen in:
Supporting Women's Lives
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
*Based on 50 customer reviews.
KEY INGREDIENTS
What's Inside The Capsule
Methylfolate
Contributes to maternal tissue growth during pregnancy and normal blood formation.
B12
Contributes to normal red blood cell formation and has a role in the process of cell division.
Choline
Contributes to normal homocysteine metabolism and maintenance of normal liver function.
Vitamin D3
Contributes to the normal function of the immune system, the maintenance of normal bones and has a role in the process of cell division.
Zinc & Selenium
Contributes to normal fertility and reproduction. Selenium contributes to the protection of cells from oxidative stress.
Customer Reviews
Overall rating: 4.9 / 5 from 92 reviews.
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.
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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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
I started The One after endometriosis surgery to help my recovery before trying. I noticed less bloating and generally felt better in myself and I think the One vitamins helped with this. Thank you The One.
I took The One in my first trimester and found it helped me manage the tiredness a little better. I still had normal pregnancy fatigue, but it wasn’t as bad as during my first pregnancy so think The One has helped with it.
I really like these vitamins. They’re easy to take and I’d recommend them!
I started The One about 10 weeks before I froze my eggs and liked that I didn’t have to take loads of separate supplements. I was pleased with my egg collection and its hard to say what made a difference but I’m glad i took the one in advance to help my egg quality.
Very happy so far. I like that everything is included in one daily dose and it doesn’t feel overwhelming to take multiple supplements.
Our 30-Day Money Back Guarantee
Try The One risk-free. If you’re not completely satisfied, simply contact us within 30 days for a full refund, no questions asked.
For Every Phases of Motherhood
A supplement that gets you, during the most important time of life.
Trimester Zero
- Fertility
- Protects cells from stress
- Hormonal Activity
- Immunity
First Trimester
- Energy
- Baby’s DNA synthesis
- Maternal Tissue Growth
- Neural Tube Development
- Nausea
Second Trimester
- Thyroid function
- Immunity
- Cognitive Function
- Blood Formulation
Third Trimester
- Bone health
- Baby’s bone development
- Blood clotting
- Nervous System
4th Trimester (for 12 months postpartum)
- Hair, skin & Nails
- Immunity
- Mental Health
- Muscle recovery
Trimester Zero
- Fertility
- Protects cells from stress
- Hormonal Activity
- Immunity
First Trimester
- Energy
- Baby’s DNA synthesis
- Maternal Tissue Growth
- Neural Tube Development
- Nausea
Second Trimester
- Thyroid function
- Immunity
- Cognitive Function
- Blood Formulation
Third Trimester
- Bone health
- Baby’s bone development
- Blood clotting
- Nervous System
4th Trimester (for 12 months postpartum)
- Hair, skin & Nails
- Immunity
- Mental Health
- Muscle recovery
Backed by Doctors. Loved by Women.
Toxic
BPA
Phthalates
Heavy Metals
Contaminants
Fillers
Toxic
BPA
Phthalates
Heavy Metals
Contaminants
Fillers
Toxic
BPA
Phthalates
Heavy Metals
Contaminants
Fillers
See The One™ Difference
the one.
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 nutrient
Multiple bottles and do not work in synergy
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.
The One™ Female Preconception Supplement