Iron for vegans: absorption matters more than the number on the label
Vegans typically eat more iron than meat eaters but store less of it, and studies consistently find lower ferritin without higher rates of anaemia. That is a body adapting: absorption of non-haem iron rises automatically when stores fall. The practical work is not eating more iron but arranging meals so more of it gets through the gut wall.
Key facts
- Daily target used here
- 18 mg
- Food sources listed
- 13
- Richest source
- Lentils — 6.6 mg
- Supplement
- When to supplement
How much you need
US RDA with the 1.8× plant-diet adjustment
US RDA with the plant-diet adjustment
US RDA — discuss with a midwife or doctor
Losses vary too much for a single figure
Where it comes from
| Food | Serving | mg | % of target |
|---|---|---|---|
| Lentils | 1 cup cooked (200 g) | 6.6 | 37% |
| White beans | 1 cup cooked | 6.6 | 37% |
| Chickpeas | 1 cup cooked | 4.7 | 26% |
| Pumpkin seeds | 30 g | 4.2 | 23% |
| Firm tofu | 150 g | 4 | 22% |
| Fortified breakfast cerealBrand-dependent, sometimes far higher | 40 g | 4 | 22% |
| Spinach, cookedOxalates limit absorption; cook and pair with vitamin C | 100 g | 3.6 | 20% |
| Blackstrap molasses | 1 tbsp | 3.5 | 19% |
| Dark chocolate 70%+ | 30 g | 3.4 | 19% |
| Quinoa | 1 cup cooked | 2.8 | 16% |
| Tempeh | 100 g | 2.7 | 15% |
| Cashews | 30 g | 1.9 | 11% |
| Dried apricots | 50 g | 1.6 | 9% |
Getting it absorbed, not just eaten
Vitamin C is the single biggest lever
Around 50 mg of vitamin C — half a bell pepper, a small orange, a squeeze of lemon, a handful of tomatoes — eaten in the same meal can raise non-haem iron absorption several-fold by reducing ferric iron to the absorbable ferrous form.
Tea and coffee are the biggest brake
Polyphenols in black tea, green tea and coffee can cut absorption from a meal by 50–90%. Move them to an hour before or after eating and you undo most of the loss.
Soak, sprout, ferment and use a cast-iron pan
Phytates in legumes and grains bind iron. Soaking overnight, sprouting, sourdough fermentation and long cooking break them down. Cooking acidic foods in cast iron measurably adds iron to the dish.
Separate calcium from iron meals
Calcium supplements and large dairy-alternative doses compete with iron. Take calcium supplements at a different meal.
When to supplement
Only on evidence. Iron supplements are not harmless — excess causes gut upset and, in people with haemochromatosis, real harm. Test ferritin first; if it is low, a common regimen is 60–100 mg of elemental iron every other day with vitamin C, which absorbs better than daily dosing because it avoids the hepcidin response.
Signs of running low
- Unusual fatigue and breathlessness on stairs
- Pale inner eyelids and gums
- Cold hands and feet
- Brittle, spoon-shaped nails and hair shedding
- Restless legs at night
- Craving ice, chalk or starch (pica)
What to test
- Ferritin
- The best marker of stores. Note it rises with inflammation, so a normal value during illness can be misleading.
- Full blood count with MCV
- Small, pale red cells point to iron deficiency anaemia — a later stage than low ferritin alone.
- Transferrin saturation
- Useful when ferritin is ambiguous, and to catch iron overload.
- CRP alongside ferritin
- Interprets whether inflammation is inflating the ferritin result.
Common mistakes
Relying on spinach
Popeye was wrong about the amount and right about nothing else: spinach's oxalates bind much of its iron. Lentils, tofu and pumpkin seeds do more work.
Drinking tea with every meal
A habitual cup of tea with lunch and dinner can quietly halve iron uptake over years.
Self-prescribing high-dose iron
Supplementing without a ferritin test can mask other causes of fatigue and cause overload in susceptible people.
Questions people ask
Are vegans more likely to be anaemic?
Reviews find vegans have lower ferritin on average but similar rates of iron-deficiency anaemia to the general population. Menstruating women of any diet are the group most at risk.
How much vitamin C do I need with an iron meal?
About 25–50 mg is enough to make a large difference — a small orange, half a pepper, a few strawberries or a generous squeeze of lemon.
Does cooking in cast iron really help?
Yes, measurably, especially with acidic foods like tomato sauce. The effect is real but variable, so treat it as a bonus rather than a plan.
Is low ferritin always a problem?
Low ferritin with normal haemoglobin can still cause fatigue and restless legs, and is worth treating. Interpret it with a clinician rather than by threshold alone.
What blocks iron absorption the most?
Tea and coffee polyphenols, phytates in unsoaked legumes and grains, and calcium taken at the same meal. Timing fixes all three.
References
Other nutrient guides
Reviewed 2026-08-23 by the Veg.ac editorial team · Data: NIH ODS — Iron fact sheet · Free to reuse under CC BY 4.0 with a link back.
General information, not medical advice. Talk to a clinician or registered dietitian about your own situation.