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OneVit B Complex is arguably one of the most game-changing supplements in our entire range, given the number of physical and cognitive functions it has been proven to help support.
Each OneVit B Complex tablet is packed with precisely measured doses of eight essential B vitamins, as well as the naturally occurring sugar inositol, to boost energy levels, promote cognitive performance, strengthen the heart, and more.
With Nutrient Reference Values for B vitamins ranging from 100% all the way up to 1,339%, OneVit B Complex is a potent and scientifically backed nutritional supplement to strengthen the body and mind.
Quality and purity are non-negotiables for every OneVit supplement - and OneVit B Complex is no exception.
Our formulation for OneVit B Complex harnesses the power of eight B vitamins extracted from natural sources, such as organic whole grains and vegetables, under expert supervision and in quality-controlled settings.
To round off our formula, we’ve included the sugar subtype ‘inositol’, which is known to support the formation of cell membranes and streamline the way cells communicate with one another to power vital physical and cognitive functions.
Each OneVit B Complex tablet contains:
- 10mg of vitamin B1 (Thiamine hydrochloride)
- 18.75mg of vitamin B2 (Riboflavin)
- 16mg of vitamin B3 (Nicotinamide)
- 62.5mg of vitamin B5 (Pantothenic acid)
- 12mg of vitamin B6 (Pyridoxine hydrochloride)
- 30µg of vitamin B12 (Methylcobalamin)
- 500µg of vitamin B7 (D-Biotin)
- 250µg of vitamin B9 (Folic acid)
- 48mg of inositol
OneVit B Complex is formulated to provide an optimal dose of B vitamins in convenient, one-a-day tablets.
Simply take one tablet of OneVit B Complex whole with water once per day, ensuring consistent use to maximise the positive benefits of this supplement.
Please note: Taking more than 200 μg/day of Folic Acid is not recommended for people over the age of 50 or who have a history of colorectal adenomas.
How do our subscriptions work?
“As a pharmacist with over 13 years in healthcare…
I’m selective about what I recommend. OneVit is UK-made, scientifically vetted, and built without compromise. For my patients, and for anyone serious about their health, it’s the one I trust.”
Ana Carolina Goncalves
GPhC Number: 2088658
“As a pharmacist with over 13 years in healthcare…
I’m selective about what I recommend. OneVit is UK-made, scientifically vetted, and built without compromise. For my patients, and for anyone serious about their health, it’s the one I trust.”
Ana Carolina Goncalves
GPhC Number: 2088658
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"This Marine Collagen from OneVit is by far the best I have found - it's the one that I really notice if I don't take it.
I had run out but wasn't training hard but could feel little niggles in connective tissue and joints - within a week of taking it again I was feeling confident to ramp the training up and haven't felt any of those niggles since."
Alex Cole
"When I moved to the UK, I noticed my energy levels dropping. Coming from a sunnier country, vitamin D deficiency wasn't even on my radar. It wasn't until a blood test that everything made sense. My levels were at 13 — deficient. After taking OneVit Vitamin D3+K2 consistently, they climbed to 117. The difference has been AMAZING — can't recommend it enough."
Rina
"My nails were breaking, my hair wasn't growing like it used to, and my psoriasis was knocking my confidence. I just wanted something simple. After introducing OneVit Biotin into my morning routine, my nails feel stronger, my hair healthier — it's a small daily habit that makes all the difference."
Kornelia
"I've been taking omega-3 for as long as I can remember, but I absolutely hated the fishy burp that would hit a few hours later. I eventually learned it's usually a sign of lower-quality oil. Since switching to OneVit, that dreaded burp has completely disappeared. All the benefits, none of the unpleasant side effects. It's been a game-changer."
Jasper
Backed By
Real Routines
Real people. Real routines. Real results. See why OneVit is becoming part of everyday wellness.
Shop The Range
"This Marine Collagen from OneVit is by far the best I have found - it's the one that I really notice if I don't take it.
I had run out but wasn't training hard but could feel little niggles in connective tissue and joints - within a week of taking it again I was feeling confident to ramp the training up and haven't felt any of those niggles since."
Alex Cole
"When I moved to the UK, I noticed my energy levels dropping. Coming from a sunnier country, vitamin D deficiency wasn't even on my radar. It wasn't until a blood test that everything made sense. My levels were at 13 — deficient. After taking OneVit Vitamin D3+K2 consistently, they climbed to 117. The difference has been AMAZING — can't recommend it enough."
Rina
"My nails were breaking, my hair wasn't growing like it used to, and my psoriasis was knocking my confidence. I just wanted something simple. After introducing OneVit Biotin into my morning routine, my nails feel stronger, my hair healthier — it's a small daily habit that makes all the difference."
Kornelia
"I've been taking omega-3 for as long as I can remember, but I absolutely hated the fishy burp that would hit a few hours later. I eventually learned it's usually a sign of lower-quality oil. Since switching to OneVit, that dreaded burp has completely disappeared. All the benefits, none of the unpleasant side effects. It's been a game-changer."
Jasper
About
Why OneVit
B Complex?
OneVit B Complex contains vitamins B1, B3, B6, and B7 to fuel the conversion of food into energy, as well as vitamin B5 to prevent dips in energy due to losses in cell viability. The combination of these effects can help support energy production to power you on a day-to-day basis.
OneVit B Complex contains vitamins B6, B9, and B12 to slow down brain atrophy and counteract the onset of dementia. These effects can help keep the brain operating at full throttle contributing to optimal focus, memory and mental clarity.
The vitamin B5 in OneVit B Complex works like armour for the heart, guarding against conditions such as coronary heart disease9 and ensuring each beat is strong and steady, day in and day out.
The vitamins B9 (folic acid) and B12 in OneVit B Complex act like quality control for your blood cells, preventing them from mutations such as abnormal growth8 that can hinder their ability to transport oxygen efficiently.
Ingredients
Premium Ingredients In OneVit B Complex
Our Premium Ingredients
We hand-pick every ingredient based on purity, potency and scientific merit with the help of
our experts, settling for nothing less than the best.
- Restores hair strength and shine
- Helps rejuvenate your skin
- Fortifies your nails
Biotin (Vitamin B7)
- Restores hair strength and shine
- Helps rejuvenate your skin
- Fortifies your nails
- Aids red blood cell maturation
- Aids nervous system functions
- Supports foetal health during pregnancy
Folic Acid
- Aids red blood cell maturation
- Aids nervous system functions
- Supports foetal health during pregnancy
- Modulates neurotransmitters that affect mood
- Helps to lower insulin resistance
- Balances blood cholesterol levels
Inositol
- Modulates neurotransmitters that affect mood
- Helps to lower insulin resistance
- Balances blood cholesterol levels
- Converts carbohydrates into energy
- Supports nerve functions
- Aids energy metabolism in cells
Vitamin B1 (Thiamine hydrochloride)
- Converts carbohydrates into energy
- Supports nerve functions
- Aids energy metabolism in cells
- Promotes the regeneration of nerves
- Contributes to red blood cell formation
- Aids DNA production and synthesis
Vitamin B12 (Methylcobalamin)
- Promotes the regeneration of nerves
- Contributes to red blood cell formation
- Aids DNA production and synthesis
- Converts macronutrients into energy
- Promotes cognitive performance
- Aids nerve signal transmission
Vitamin B2 (Riboflavin)
- Converts macronutrients into energy
- Promotes cognitive performance
- Aids nerve signal transmission
- Contributes to heart health
- Helps balance blood cholesterol levels
- Reduces the risk of high blood pressure
Vitamin B3 (Nicotinamide)
- Contributes to heart health
- Helps balance blood cholesterol levels
- Reduces the risk of high blood pressure
- Supports optimal cell respiration
- Converts macronutrients into energy
- Helps balance blood cholesterol levels
Vitamin B5 (Pantothenic acid)
- Supports optimal cell respiration
- Converts macronutrients into energy
- Helps balance blood cholesterol levels
- Promotes red blood cell production
- Contributes to improving mood
- Supports heart and arterial health
Vitamin B6 (Pyridoxine hydrochloride)
- Promotes red blood cell production
- Contributes to improving mood
- Supports heart and arterial health
Overall Rating
5 / 5
Based on 21 independent customer reviews taken by Feefo and Trustpilot.
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Excellent prodict
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It’s excellent, I always bought in this pharmacy
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cleared cold sore
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Excellent
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Take daily and hope they are working.
Always great service and fast shipping.
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"Excellent level of service"
Brilliant and cost effective
Above and beyond allways dealt with my queries swiftly and with due care
My orders are shipped immediately i cant really ask for much more brilliant service
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Faq
B Complex FAQs
OneVit B Complex contains eight B vitamins and inositol for wide-ranging cognitive and physical support.
OneVit B Complex
30g (60 servings per bottle)
| Ingredient | Quantity per serving | NRV* |
|---|---|---|
| Vitamin B1 (Thiamine hydrochloride) | 10mg | 909% |
| Vitamin B2 (Riboflavin) | 18.75mg | 1,339% |
| Vitamin B3 (Nicotinamide) | 16mg | 100% |
| Vitamin B5 (Pantothenic acid) | 62.5mg | 1,041% |
| Vitamin B6 (Pyridoxine hydrochloride) | 12mg | 857% |
| Vitamin B12 (Methylcobalamin) | 30µg | 1,200% |
| Biotin (D-Biotin) | 500µg | 1,000% |
| Folic Acid | 250µg | 125% |
| Inositol | 48mg | † |
* NRV = Nutrient Reference Value
† No NRV established
OneVit B Complex is a powerful, all-encompassing supplement that supports a broad range of physical and cognitive functions.
In terms of its physical benefits, the thiamine (vitamin B1), niacin (vitamin B3) and pantothenic acid (vitamin B5) in OneVit B Complex support the conversion of proteins, carbohydrates and fats into the energy you need to function at your best throughout the day.
Niacin (vitamin B3) in particular also contributes to balancing cholesterol levels and reduces the risk of high blood pressure, while pyridoxine (vitamin B6) supports heart and arterial health, ensuring your cardiovascular system remains robust.
OneVit B Complex also contains riboflavin (vitamin B2) to support nerve signal transmissions, pyridoxine (vitamin B6) to aid red blood cell production and mood regulation, as well as inositol to help modulate neurotransmitters that affect mood.
Finally, biotin (vitamin B7) contributes to hair strength and growth, promotes nail strength, and improves skin health, ensuring you look and feel your best.
Certain B vitamins are pivotal in supporting mental performance because they affect mood, memory and focus.
Vitamin B6 and inositol take centre stage for their role of promoting mood24,26, as well as riboflavin (vitamin B2) in supporting short-term memory and logical reasoning29.
Vitamins B1, B2, B3 and B5 are directly involved in energy production at a cellular level, supporting your body’s ability to transform macronutrients into energy with efficiency and ease.
OneVit B Complex contains more than 100% of the Nutrient Reference Values of each of these B vitamins - simply take one tablet per day and you’ll be well on your way to boosting your daily energy levels.
One tablet per day is sufficient to boost your body’s B vitamin reserves. If you want to take more than this amount, we would recommend speaking with a doctor or GP beforehand.
OneVit B Complex begins to work in a matter of days, although the time it takes to notice the results varies from person to person.
For optimal results, we recommend taking OneVit B Complex once a day every day, as consistency is key to achieving your desired results.
Most people can safely take OneVit B complex daily for an extended period, although its long-term use could cause mild tingling or numbness in some people.
If you experience this, stop taking OneVit B Complex and consult a doctor about your usage.
OneVit Vitamin C can amplify the immune support provided by the vitamin B6 and folic acid included in our OneVit B Complex formulation.
This combination helps your body stay resilient, boosting both energy and vitality while supporting overall well-being.
OneVit Iron also works alongside the vitamin B12 and folic acid in OneVit B Complex to support red blood cell and haemoglobin levels, enabling optimal oxygen transportation throughout your body to give you a natural energy boost.
To enhance mood and cognitive function, OneVit Vitamin C is a great addition to your wellness routine. Magnesium calms the nervous system, complementing the cognitive improvements OneVit B Complex brings to the table.
We also think OneVit Probiotics Complex deserves a mention as it supports gut health, which can help your body absorb and better utilise the B vitamins in OneVit B Complex.
OneVit B Complex is suitable for both vegans and vegetarians. Our suppliers use rigorous quality testing during the manufacturing process to avoid cross-contamination.
OneVit B Complex doesn’t contain any allergens and is suitable for both vegans and vegetarians.
We would recommend consulting your doctor before taking OneVit B Complex while breastfeeding or during pregnancy.
It depends on the type of medications you’re taking. Medicines that affect your brain’s levels of the serotonin neurotransmitter, or your stomach acid production, could disrupt the absorption and utilisation of certain B vitamins in OneVit B Complex, such as Vitamin B6 or B12.
This could increase how much time it takes to experience the desired results from taking OneVit B Complex, with the exact increase depending on how long you’ve been taking such medicines and how big of a dosage you’re taking.
We always recommend consulting a doctor before taking this supplement alongside medications to stay safe and ensure you get the most out of OneVit B Complex.
Store OneVit B Complex in a cool, dry place away from direct sunlight and high temperatures. Do not leave OneVit B Complex in the sight or reach of children or pets.
Once you’ve opened a bottle of OneVit B Complex, consume one tablet per day. For details regarding expiry and production, refer to the top of the bottle.
- https://www.ncbi.nlm.nih.gov/books/NBK482360/
- https://www.kcl.ac.uk/open-global/biomarkers/vitamin/vitamin-b3
- https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/vitamin-b6#:~:text=29.2.3-,vitamin%20b6,-Vitamin%20B6%20may
- https://www.researchgate.net/publication/12472833_Importance_of_biotin_metabolism
- https://www.sciencedirect.com/science/article/pii/S109671762030063X#sec3:~:text=We%20chose%20to,allow%20cell%20division
- https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0012244
- https://www.mdpi.com/2072-6643/8/12/761#:~:text=Mean%20daily%20intakes,models%2C%20Table%202).
- https://www.nhs.uk/conditions/vitamin-b12-or-folate-deficiency-anaemia/
- https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2022.906232/full#h6
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5582478/
- https://onlinelibrary.wiley.com/doi/abs/10.1111/ijd.15485
- https://lpi.oregonstate.edu/mic/vitamins/biotin
- https://www.ncbi.nlm.nih.gov/books/NBK554487/#:~:text=Folic%20acid%20is%20the%20synthetic,red%20blood%20cells%20(RBCs).
- https://pubmed.ncbi.nlm.nih.gov/17052662/
- https://www.mountsinai.org/health-library/supplement/vitamin-b1-thiamine
- https://onlinelibrary.wiley.com/doi/full/10.1111/cns.13207
- https://www.jstage.jst.go.jp/article/jpfsm/4/4/4_337/_article/-char/ja/
- https://my.clevelandclinic.org/health/drugs/18874-niacin-capsules-and-tablets
- https://health.clevelandclinic.org/niacin-vitamin-b3
- https://pmc.ncbi.nlm.nih.gov/articles/PMC7788463/
- https://ods.od.nih.gov/factsheets/PantothenicAcid-Consumer/#:~:text=professional%20fact%20sheet.-,What%20is%20pantothenic%20acid%20and%20what%20does%20it%20do?,making%20and%20breaking%20down%20fats.
- https://www.sciencedirect.com/science/article/abs/pii/S0271531711001461
- https://www.mountsinai.org/health-library/supplement/vitamin-b6-pyridoxine
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9577631/
- https://onlinelibrary.wiley.com/doi/pdf/10.1155/2021/9968228
- https://www.mountsinai.org/health-library/supplement/vitamin-b12-cobalamin#:~:text=vitamin%20b12%20works%20closely%20with%20vitamin%20b9%2C%20also%20called%20folate%20or%20folic%20acid%2C%20to%20help%20make%20red%20blood%20cells%20and%20to%20help%20iron%20work%20better%20in%20the%20body
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10305463/#:~:text=Vitamin%20B12%20acts%20as%20a,can%20result%20in%20genetic%20instability.
- https://www.kcl.ac.uk/open-global/biomarkers/vitamin/vitamin-b2
- https://pubmed.ncbi.nlm.nih.gov/39304710/
- https://pubmed.ncbi.nlm.nih.gov/33886098/#:~:text=in%20the%20nervous%20system%2C%20riboflavin%20is%20essential%20for%20the%20synthesis%20of%20myelin%20and%20its%20deficiency%20can%20determine%20the%20disruption%20of%20myelin%20lamellae
- https://www.mdpi.com/1467-3045/45/2/113#:~:text=of%20monoamines%20%5B95%5D.-,It%20has%20been%20suggested,adrenal%20(HPA)%20axis%20%5B98%5D.,-Two%20studies%20evaluated
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8896029/#:~:text=myo-inositol%20lowers%20serum%20insulin%20and%20improves%20insulin%20resistance%20approximately%20twofold%20better%20compared%20with%20pioglitazone%20or%20metformin%2C%20which%20are%20considered%20the%20gold%20standard%20medications%20in%20those%20with%20impaired%20glucose%20tolerance
- https://pmc.ncbi.nlm.nih.gov/articles/PMC5968598/
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