Zinc for vegans: the quietly under-eaten mineral
Zinc rarely gets attention until someone notices slow-healing cuts or repeated colds. Plant-based diets are not automatically short of it, but they sit closer to the line than omnivorous ones, and the difference is absorption rather than intake. Almost every fix here is a preparation technique rather than a supplement.
Key facts
- Daily target used here
- 11 mg
- Food sources listed
- 12
- Richest source
- Oats — 3.1 mg
- Supplement
- Usually unnecessary
How much you need
US RDA with the plant-diet adjustment
US RDA with the plant-diet adjustment
US RDA
Higher intakes interfere with copper absorption
Where it comes from
| Food | Serving | mg | % of target |
|---|---|---|---|
| Oats | 80 g dry | 3.1 | 28% |
| Hemp seeds | 30 g | 3 | 27% |
| Fortified breakfast cereal | 40 g | 3 | 27% |
| Lentils | 1 cup cooked | 2.5 | 23% |
| Chickpeas | 1 cup cooked | 2.5 | 23% |
| Pumpkin seeds | 30 g | 2.2 | 20% |
| Firm tofu | 150 g | 2 | 18% |
| Cooked quinoa | 1 cup | 2 | 18% |
| Cashews | 30 g | 1.6 | 15% |
| Wholemeal sourdough breadFermentation cuts phytate | 2 slices | 1.4 | 13% |
| Tahini | 2 tbsp | 1.4 | 13% |
| Tempeh | 100 g | 1.1 | 10% |
Getting it absorbed, not just eaten
Phytate is the whole story
Zinc binds tightly to phytic acid in unprocessed legumes, grains and seeds. Diets high in unsoaked wholegrains can drop absorption from around 30% to under 15%.
Soak, sprout, ferment, toast
Soaking beans overnight and discarding the water, sprouting lentils, using sourdough rather than fast-yeast bread, and toasting nuts and seeds all reduce phytate and free up zinc.
Do not take iron supplements with zinc
High-dose iron competes with zinc at the same transporters. Separate them by a few hours if you take both.
Usually unnecessary
Most plant-based eaters covering legumes, seeds and wholegrains daily are fine. If you supplement, 10–15 mg is plenty; sustained doses above 40 mg cause copper deficiency, which is harder to fix than the problem you started with.
Signs of running low
- Cuts and scratches healing slowly
- Frequent colds and infections
- Loss of taste or smell
- Hair thinning, and white spots on nails
- Acne or persistent skin problems
- Reduced appetite
What to test
- Serum or plasma zinc
- The usual test, but it is a weak marker — levels fall with inflammation and after meals. Fast and test in the morning.
- Symptom review plus intake diary
- Often more informative than serum zinc alone.
- Check copper if supplementing long term
- Long-term high-dose zinc depletes copper.
Common mistakes
Eating only unsoaked wholegrains
Wholegrain everything, never soaked or fermented, is the classic pattern for low zinc absorption.
Long-term high-dose zinc lozenges
Fine for a few days of a cold, damaging over months.
Assuming a multivitamin covers it
Many multivitamins carry 2–5 mg, a fraction of the target. Food does the heavy lifting.
Questions people ask
Are vegans zinc deficient?
Studies find lower average serum zinc in vegetarians and vegans but few clinical deficiencies. Preparation methods that cut phytate largely close the difference.
What is the best vegan zinc food?
Pumpkin and hemp seeds by density, and legumes by volume eaten. A daily handful of seeds plus a serving of beans covers most of the target.
Does cooking destroy zinc?
No — zinc is heat-stable. Cooking actually helps by reducing phytate.
Can I take zinc and iron together?
Better not in the same dose. High-dose iron reduces zinc absorption; separate them or take each with different meals.
How much zinc is too much?
Sustained intakes above 40 mg a day risk copper deficiency, anaemia and neurological problems.
References
Other nutrient guides
Reviewed 2026-08-23 by the Veg.ac editorial team · Data: NIH ODS — Zinc 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.