Most men who go looking for zinc reach straight for a supplement. For the majority, that is the wrong first move. The UK reference nutrient intake for adult men is 9.5 mg a day, and that is comfortably reachable from food — if you know which foods actually deliver, and which ones only look like they do on paper.
This guide ranks the real sources by zinc content, then explains the part most lists leave out: how much of that zinc you actually absorb.
How much zinc do men need?
- UK reference nutrient intake (RNI): 9.5 mg per day for adult men
- US RDA: 11 mg per day
- Upper limit: 40 mg per day from all sources; UK guidance advises no more than 25 mg per day from supplements alone
The RNI is set to cover roughly 97.5% of the population, so it already has headroom built in. Hitting it consistently is the goal — not exceeding it.
Zinc-rich foods ranked, per 100 g
| Food | Zinc per 100 g | % of male RNI |
|---|---|---|
| Oysters | ~39 mg | 410% |
| Beef (chuck / braising steak) | ~8.5 mg | 89% |
| Pumpkin seeds | ~7.8 mg | 82% |
| Cashews | ~5.8 mg | 61% |
| Lamb | ~4.5 mg | 47% |
| Crab | ~4.0 mg | 42% |
| Hemp seeds | ~3.9 mg | 41% |
| Cheddar cheese | ~3.1 mg | 33% |
| Lentils (cooked) | ~1.3 mg | 14% |
| Chickpeas (cooked) | ~1.5 mg | 16% |
| Eggs | ~1.3 mg | 14% |
Values are approximate and vary by cut, variety and preparation.
The bit most lists skip: absorption
Raw zinc content is only half the story. What matters is how much crosses into your bloodstream, and that varies enormously by source.
Animal sources are absorbed far better. Meat contains no phytates and comes with amino acids that aid uptake, so you absorb roughly 40–50% of the zinc in beef or lamb.
Plant sources are held back by phytates. Nuts, seeds, pulses and wholegrains contain phytic acid, which binds zinc and carries it straight through you. Typical absorption from plant sources is around 20%.
The practical consequence is bigger than it sounds. Cashews list 5.8 mg per 100 g, which looks close to beef's 8.5 mg. But at ~20% absorption you take up roughly 1.2 mg from the cashews, against roughly 3.8 mg from the beef. On paper they are comparable. In practice the beef delivers about three times as much.
This is why UK and international guidance suggests men eating a fully plant-based diet may need up to 50% more zinc than the headline RNI.
How to get more out of plant sources
- Soak pulses, nuts and seeds before use.
- Sprout beans and lentils where practical.
- Ferment — sourdough leavening breaks down a large share of the phytate in bread, which is why sourdough beats standard wholemeal for mineral availability.
- Separate from tea and coffee. Tannins interfere with mineral uptake; leave a gap around meals.
- Pair with protein. Adding some animal protein to a plant-heavy meal improves zinc absorption from the whole plate.
What a day hitting 9.5 mg actually looks like
Omnivore: two eggs at breakfast (~1.3 mg), a cheese and wholegrain sandwich at lunch (~2 mg), 150 g braising steak at dinner (~12 mg). Comfortably over, with absorption in your favour.
Plant-based: porridge with 30 g pumpkin seeds (~2.3 mg), a chickpea and lentil bowl at lunch (~3 mg), tofu with cashews and wholegrains at dinner (~4 mg). Around 9 mg on paper — but at ~20% absorption, meaningfully less in practice. This is the diet pattern where soaking, sprouting and fermenting genuinely earn their keep, and where a shortfall is most likely to develop quietly.
Common questions
Are oysters really that high in zinc?
Yes — they are a genuine outlier, at roughly four times the male daily requirement in a 100 g serving. Their long-standing reputation as an aphrodisiac is a separate matter with far weaker evidence behind it; the zinc content itself is not in dispute.
Do I need a zinc supplement?
Most men eating a varied omnivorous diet do not. Supplements make sense where a deficiency has been confirmed, or where diet, absorption or medication make a shortfall likely. Long-term high-dose zinc blocks copper absorption and causes its own problems, so more is not better. Speak to a GP or pharmacist before starting one.
Does cooking destroy zinc?
No. Zinc is a mineral and is heat-stable. Some can leach into cooking water, so using the liquid in soups and stews keeps it on the plate.
Which is the best plant source of zinc?
Pumpkin seeds, by a clear margin — around 7.8 mg per 100 g. Roughly 30 g on porridge or a salad is an easy daily habit.
Where herbal bitters fit in
Gear 1 4Real African Bitters is a non-alcoholic herbal bitters made from African root and herb extracts — aloe, khaya ivorensis, rhuherbs root — blended to a traditional recipe and taken as a daily bitter tonic in the way it has been for generations. It is a food supplement, not a mineral supplement and not a source of dietary zinc, and it is not a substitute for the foods above or for medical advice.
If you want the other side of this topic, our guide to zinc deficiency symptoms in men covers what a shortfall looks like and how it is diagnosed.
If you are wondering whether a blood test would settle it, we look at what those tests can and cannot show in whether you need a zinc test.
Related: how much zinc is too much.
This article is general information, not medical advice. Food supplements are not intended to diagnose, treat, cure or prevent any disease. If you have persistent symptoms, or you are pregnant, breastfeeding or taking medication, speak to a doctor or pharmacist before changing what you take.