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Pure Encapsulations earns its place on our shelves because its formulations are regularly cited by integrative doctors and functional medicine practitioners. The O.N.E with Iron fills a specific gap: a clean, once-daily multi that doesn't shy away from including iron, which matters for patients we see with confirmed deficiency. We recommend confirming iron status via a blood panel before starting, rather than supplementing blind.
About this product
O.N.E Multivitamin with Iron
Pure Encapsulations O.N.E Multivitamin with Iron is a once-daily capsule delivering a broad-spectrum vitamin and mineral blend, formulated to address nutritional gaps in a single daily dose. It includes iron, which is notably absent from many standard multivitamins, making it relevant for those who have identified low ferritin or iron deficiency through a blood test, or who have increased physiological demand — menstruating women, pregnant women, or those with dietary restrictions that limit red meat intake.
The formula covers the foundational micronutrient bases: the B-vitamin complex to support energy metabolism and neurological function, fat-soluble vitamins for immune and cellular health, and key minerals alongside iron for broader physiological support. One capsule daily keeps the routine simple, which tends to improve consistency over time.
Pure Encapsulations is a brand with a longstanding reputation for clean, well-characterised formulations, and is frequently referenced by integrative clinicians. Their products are commonly chosen when patients need confidence in ingredient identity and dose integrity — particularly those who react to additives or fillers common in high-street multivitamins. This makes the O.N.E with Iron a considered choice rather than a default one, best suited to individuals who have confirmed they would benefit from supplemental iron rather than taking it speculatively.
What it does
Benefits
- 01
Once-daily multivitamin with iron included in the formula
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Suited to those with confirmed low ferritin or iron need
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B-vitamin complex to support energy and neurological function
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Clean formulation from a clinician-trusted brand
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Broad micronutrient cover in a single daily capsule
Get the most from it
How to use
Take one capsule daily with food. Taking it with a meal helps tolerance and may support absorption of fat-soluble vitamins in the formula. Follow the dosage guidance on the packaging and consult a clinician if you are unsure whether iron supplementation is appropriate for you.
What's inside
Ingredients
View full ingredient list
Comprehensive vitamin and mineral blend with Iron
Common questions
Frequently asked
Why does this multivitamin include iron when many others do not?
Most broad multivitamins omit iron because excess iron is not benign — it can cause gastrointestinal discomfort and, in some individuals, accumulate to problematic levels. This formula includes it for those who have a confirmed need, such as low ferritin on a blood test, increased physiological demand, or a diet low in haem iron sources. If you are not sure whether you need supplemental iron, get tested first.
Who is this multivitamin not suitable for?
Anyone with haemochromatosis or elevated iron levels should avoid iron-containing supplements. Men and post-menopausal women with no confirmed deficiency typically do not need supplemental iron and should consider a version without it. If you are on medication or managing a chronic condition, check with your GP or prescribing clinician before starting any new supplement.
How long before I notice a difference?
Micronutrient repletion is gradual. If you were deficient, improvements in energy and wellbeing may become noticeable over several weeks to a few months. A follow-up blood test at three to six months is the most reliable way to assess whether your levels have responded.
Can I take this alongside other supplements?
Generally yes, but be mindful of duplication — if you are already taking a separate iron supplement, a B-complex, or individual fat-soluble vitamins, check the combined totals against safe upper limits. High-dose vitamin A alongside a multivitamin is a common area to watch. A clinician or registered nutritionist can help you map your full supplement stack.
Why choose Pure Encapsulations over a supermarket multivitamin?
Pure Encapsulations formulations are well-characterised and minimise excipients, which matters for individuals who react to common fillers, colourings, or allergens found in mass-market vitamins. The brand is frequently used in clinical practice, which means the ingredient forms and doses tend to reflect what practitioners actually consider meaningful rather than what looks impressive on a label.
Doctor-guided care
Test before you supplement.
Bloods are the only way to know what your body actually needs. We'll tell you which of these supplements earn their place.
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