The short version
If you only have ninety seconds: iron is the single most-common nutrient women are low in, especially women who menstruate, women who eat little or no red meat, and women in the first year postpartum. The right supplement depends on your iron form tolerance, dose, what you take with it and what your bloodwork actually says.
Of the ten we reviewed, three stood out: Loomi Iron Restore as our editor's pick for everyday use, Ardent Heme Iron+ for women with stomach sensitivity, and Veridique Plant Iron for vegans and vegetarians. The rest range from "fine, but you can do better" to "skip entirely."
Before buying anything: ferritin and full iron studies are inexpensive, widely available and tell you whether you actually need iron. Supplementing iron when you don't need it is not a neutral act. Talk to your doctor or a qualified health professional before starting any iron supplement, particularly if you're pregnant, have a known condition, or take other medication.
How we review
Every product on this page was scored on the same six-criterion framework. No brand has paid for placement, and no result has been edited to favour an advertiser. We update our scores when products reformulate or when new third-party testing data becomes available.
Bioavailability
Iron form (bisglycinate, fumarate, sulfate, heme, etc.), supporting cofactors and absorption-blocking ingredients.
Dose transparency
Is elemental iron disclosed, or only the salt weight? Are blends labelled with per-ingredient quantities?
Third-party testing
Independent lab verification for purity, heavy metals and label-claim accuracy. We weight NSF, USP and Informed Choice highest.
Tolerability
Real-world reports of GI side effects, taste, swallow size, and how the product fits into a daily routine.
Price per serve
Cost of a standard serving at the time of review, including subscription discounts and shipping if relevant.
Claim integrity
Does the brand make medical claims it can't back up? We mark down products that promise to "cure," "treat" or "fix."
A note on what we don't do. We don't diagnose. We don't tell you whether you need iron — your blood work and your doctor do. We don't recommend dosing for individuals. Use this review as a shortlist and a starting point for a conversation with a qualified health professional.
All 10, at a glance
Sortable comparison of every supplement on the shortlist. Scores are out of 100. Price per serve is at standard non-subscription RRP.
The full shortlist
| Product | Iron form | Elemental dose | 3rd party | Price / serve | HEME score | Verdict |
|---|---|---|---|---|---|---|
LoomiIron Restore |
Bisglycinate | 25 mg | ✓ NSF | $1.20 | 92/100 | Editor's pick |
ArdentHeme Iron+ |
Heme iron polypeptide | 11 mg | ✓ Informed Choice | $1.85 | 89/100 | Best for sensitive stomachs |
VeridiquePlant Iron Daily |
Curry leaf iron + Vit C | 14 mg | ✓ ISO 17025 | $0.95 | 86/100 | Best for vegans |
CinqueSang Iron Botanical |
Iron bisglycinate + herbs | 20 mg | ✓ NSF | $1.50 | 83/100 | Solid |
FoldeLiquid Iron |
Iron gluconate | 10 mg | — Not disclosed | $0.75 | 76/100 | Best value |
KlaraSlow-Release Iron |
Ferrous fumarate, controlled | 45 mg | ✓ TGA listed | $0.55 | 74/100 | High-dose option |
VerstigIron Bisglycinate |
Bisglycinate | 20 mg | — Self-reported | $0.85 | 68/100 | Fine |
MarisDaily Iron Gummies |
Ferric pyrophosphate | 9 mg | — Self-reported | $1.05 | 58/100 | Skip |
North & HonestIron Blend |
Proprietary blend | Undisclosed | — Not disclosed | $2.10 | 42/100 | Skip |
RAW WellnessIron Detox Tonic |
Iron citrate + "blood cleanse" herbs | 5 mg | — Not disclosed | $2.40 | 38/100 | Skip |
"Skip" is not a moral judgement on the brand — it means that for the criteria we score on, you can do better at the same or lower price. Brand names are illustrative for this review preview.
Our picks, reviewed.
Three editorial picks, written long-form. Each follows the same structure: why it earned the score it did, the strongest case for buying it, the case against, and the kind of woman it's actually a good fit for.
Want the long-form review of every product on the shortlist, including the seven we didn't highlight? Read the full edition →
How to choose, in plain English.
If you skip the table and read nothing else, read this.
Get blood work before you buy.
You probably don't need us to tell you this, but it's worth saying clearly: iron is one of the few supplements where taking it when you don't need it is not a neutral act. Ferritin is the single most useful marker for "do I actually have low iron stores," and a full iron studies panel adds context. Both are inexpensive and widely available. Read our plain-English ferritin guide →
Form matters more than dose.
A 65 mg ferrous sulfate that you can't tolerate is a worse outcome than a 14 mg bisglycinate you take consistently. The form determines absorption and tolerability — both more important, in practice, than the headline number on the label.
Watch out for what blocks iron absorption.
Coffee, black tea, calcium, and high-dose zinc all reduce non-heme iron absorption. The classic advice — take iron away from coffee and dairy, with a vitamin C source — exists for a reason. Heme iron is largely unaffected by these interactions, which is part of why we rate it well for tolerability.
If your label says "blend," ask why.
Proprietary blends let brands hide individual ingredient quantities behind a single number. There is almost never a good reason to do this. We mark down any product that doesn't disclose elemental iron clearly.
Read the testing claim, not just the badge.
"Third-party tested" can mean anything from "an independent NSF-certified lab tested every batch with a public certificate of analysis" to "we sent one sample to a friend's lab in 2019." Look for named certifications (NSF, USP, Informed Choice) and publicly accessible certificates of analysis.
Better questions to ask your doctor
HEME isn't a diagnosis tool. We help you arrive at the appointment with sharper questions. If you suspect low iron, consider asking:
- Can we run a full iron studies panel, including ferritin, transferrin saturation and total iron-binding capacity?
- What ferritin range are you considering "normal" for me, given my age, cycle and lifestyle?
- If supplementing makes sense, which form would you recommend for me specifically, and at what dose?
- Are there underlying reasons we should investigate, beyond simply replacing what's lost?
- When should we re-test to know whether the approach is working?
This is educational only. It is not a substitute for personal medical advice from a qualified health professional. Always discuss symptoms, blood results and treatment decisions with someone who knows your full medical history.
FAQ
How long does it take for iron supplements to "work"?
This is one of the most common questions women ask after starting iron, and there's no single answer — but bloodwork is usually re-tested at around three months. Subjective changes (energy, hair shedding, exercise tolerance) often lag behind lab number changes. Speak to your doctor about a realistic timeline for your specific situation.
Is "iron + vitamin C" actually meaningful?
For non-heme iron (the form in plant foods and most non-meat-derived supplements), vitamin C can meaningfully increase absorption when taken together. For heme iron, the effect is much smaller. If your supplement is non-heme and doesn't include vitamin C, taking it with a small glass of orange juice or with a vitamin C tablet is a sensible move.
Why do iron supplements make me nauseous?
Most "iron makes me feel sick" reactions are tied to ferrous sulfate or other older iron salts at high elemental doses. Switching forms — to bisglycinate, heme polypeptide, or slow-release — is the change that most often resolves it. Taking iron every other day instead of daily is another approach some clinicians use to reduce side effects without compromising absorption.
Should I take iron during my period?
Whether and when to take iron is a personal medical decision. Some women find a consistent daily routine easier to maintain; others prefer to time supplementation to their cycle. Discuss with your doctor what makes sense for your situation.
Can I take iron with multivitamins?
Calcium, zinc and magnesium — common multivitamin ingredients — can compete with iron for absorption when taken at the same time. The pragmatic move is to space them: take iron in the morning, multivitamin in the evening, or vice versa.
What if I'm pregnant or breastfeeding?
This is exactly the situation where general supplement reviews stop being useful and personal medical advice starts mattering. Iron requirements shift significantly in pregnancy and postpartum. Please don't make supplement decisions in these phases based on a review article — speak to your obstetrician, midwife or GP.