The 15 best zinc-rich foods, ranked by mg per 100g

Daily zinc requirements

Zinc isn't a vitamin you can "stock up" on — the body holds only 2–3 grams total with no dedicated storage organ, so you need a steady daily supply. The U.S. Institute of Medicine RDA is 11 mg/day for men and 8 mg/day for women, with slightly higher targets during pregnancy and breastfeeding.

Crucially, vegetarians and vegans need 30–50% more than omnivores because plant zinc is bound to phytates which block absorption — the Institute of Medicine recommends ~12 mg/day for vegetarian women and 16 mg/day for vegetarian men. See the plant zinc section for how to work around it.

Zinc content per serving: what real portions actually deliver

Per 100g is the scientific reference, but a realistic portion of oysters is six on a plate — not 100 grams. The chart below shows what each food delivers in a real-world serving, as a percentage of the daily zinc target. Toggle between Women / Men and check the Vegetarian modifier for the 50% higher targets that account for reduced plant-zinc absorption.

Everyday foods that contribute zinc (for reference)

The top 15 are zinc powerhouses, but most people don't eat oysters or wheat germ daily. The list below shows the everyday animal and plant foods that contribute zinc in real meal-sized portions. Added for reference and comparison so you can see how your typical diet stacks up.

The 15 best zinc-rich foods (per 100g)

All values are per 100g, sourced from USDA FoodData Central. The reference RDA is 8 mg/day for women and 11 mg/day for men; vegetarians should aim 50% higher.

1. 1Oysters (Eastern)39 mg
   The undisputed champion. A single Eastern oyster (~15g) delivers ~5–6 mg of zinc — nearly enough for a woman's entire day. Pacific oysters are lower (~17 mg/100g) but still in a class above almost any other food. Daily intakeJust ~20g — about 1.5 large oysters — covers the 8 mg women's RDA! A standard 80g portion (6 medium oysters) gives ~31 mg, nearly 4× daily needs. Bioavailability is exceptionally high (~30–40%, vs ~15–25% from plants). Caveat: raw oysters carry small norovirus/vibrio risk — cook them if you're immunocompromised, pregnant, or elderly.
2. 2Wheat germ (toasted)17 mg
   A forgotten powerhouse — the embryo of the wheat kernel, removed during refining. One tablespoon (~15g) sprinkled on yogurt or oatmeal delivers a meaningful zinc boost without changing the meal much. Daily intake~47g (~3 tbsp) for 8 mg. A 15g tablespoon covers ~32% of daily needs, plus vitamin E, folate, and fibre. Store refrigerated — the oils go rancid quickly at room temperature.
3. 3Hemp seeds9.9 mg
   Eaten by the spoonful in smoothies, yogurt, and salads. A 30g serving (~2 tbsp) delivers ~3 mg of zinc plus complete protein and a 3:1 omega-6 to omega-3 ratio. Daily intake~81g (~5 tbsp) for 8 mg — impractical in one sitting. A realistic 30g serving covers ~37% of women's daily needs. One of the highest-zinc plant foods eaten in real spoonful portions, not just sprinkles.
4. 4Beef (chuck, lean cooked)8.5 mg
   A single normal portion of beef covers a day and a half of zinc, with high bioavailability — no phytate, no inhibitors. Slow-cooked chuck specifically runs higher than leaner cuts. Daily intake~94g (a small steak) for 8 mg. A 150g portion delivers ~13 mg — over 150% of women's daily needs. Pair with a vitamin-C-rich side to also boost the non-heme iron in the meal.
5. 5Pumpkin seeds (dried kernels)7.8 mg
   Already a top iron and magnesium source — and one of the best plant zinc sources you can keep in a jar on the counter. A 30g handful delivers ~2.3 mg. Daily intake~103g (~3/4 cup) for 8 mg. A 30g handful covers ~29% of women's daily needs. Sprout or soak overnight to roughly halve the phytate and boost absorption.
6. 6Sesame seeds (whole)7.8 mg
   Sprinkle on stir-fries, sushi, salads, or eat as tahini. Whole sesame seeds have more zinc than tahini because the latter is partly hulled. Daily intake~103g for 8 mg — far more than anyone eats as a sprinkle. A 15g tablespoon covers ~15% of daily needs. Black (unhulled) sesame has slightly more zinc and more calcium than white.
7. 7Crab (king, cooked)7.6 mg
   King crab leads the crab family for zinc. Blue crab and Dungeness sit lower (~4–5 mg/100g) but are still excellent sources. Daily intake~105g for 8 mg. A 150g serving (one large leg) delivers ~11 mg — over 140% of women's daily needs, plus copper and selenium that work alongside zinc for immunity.
8. 8Lamb (shoulder, lean cooked)7.3 mg
   Often overlooked in zinc rankings dominated by beef. A typical lamb chop or shoulder serving delivers comparable zinc to beef with a different fatty acid profile. Daily intake~110g for 8 mg. A 150g portion (1 chop) delivers ~11 mg — about 137% of women's daily needs.
9. 9Cocoa powder (unsweetened)6.8 mg
   Not a serving-size food — you use ~1 tablespoon (10g) at a time in baking or hot chocolate. Per tablespoon: ~0.7 mg of zinc — modest, but it adds up. Daily intake~118g (~12 tablespoons) for 8 mg — impractical! A normal tablespoon covers ~9% of daily needs. The dark chocolate at #15 is essentially cocoa powder in eat-by-the-square form.
10. 10Pine nuts6.4 mg
    Expensive per gram, but a small amount goes a long way. Famous as the protein in pesto. Daily intake~125g for 8 mg — that's a lot of pine nuts (and a lot of money). A 30g handful covers ~24% plus magnesium and vitamin E. Rare quirk: ~1 in 5,000 batches cause "pine mouth" — a metallic taste that lasts days. Harmless but odd.
11. 11Cashews5.6 mg
    Higher in carbs than other tree nuts and a versatile pantry staple — cashews work as a snack and as a base for plant-milk and creamy sauces (soaked, blended). Daily intake~143g for 8 mg. A 30g handful (~18 cashews) covers ~21% of daily needs. Soaking overnight for cashew cream sauces also reduces phytate and improves zinc absorption.
12. 12Beef liver (cooked)5.2 mg
    Already a legend for B12, iron, vitamin A, and copper — also a real zinc source. Lower per 100g than steak, but still high. Daily intake~154g (one large slice) for 8 mg. An 80g portion (one pan-fried slice) gives ~4.2 mg — about 52% of women's daily needs, plus a serious chunk of multiple other micronutrients in the same bite.
13. 13Tahini4.6 mg
    Sesame seed paste — the protein in hummus, baba ganoush, salad dressings. A tablespoon adds zinc, healthy fats, and calcium. Daily intake~174g for 8 mg — about a small jar. A 20g tablespoon covers ~12% of daily needs. Hummus (chickpeas + tahini) is a particularly clever combination — together they cover ~50% of daily needs in a typical dip serving.
14. 14Pecans4.5 mg
    The buttery, milder cousin of walnuts. Good for snacking, pies, and oatmeal toppings. Daily intake~178g for 8 mg. A 30g handful covers ~17% of daily needs plus monounsaturated fats and antioxidants.
15. 15Dark chocolate (70–85%)3.3 mg
    A genuinely useful zinc snack — and one of the most enjoyable ways to add the mineral to your diet. Darker = more zinc (and magnesium, copper, antioxidants). Daily intake~242g (~2.5 bars) for 8 mg — too much daily sugar. A normal 30g portion (2–3 squares) covers ~12% without overdoing it. 100% cacao has roughly double the zinc but is bitter enough that most people use it only in cooking.

Zinc content comparison — per 100g

Oysters: why nothing else comes close

If you wanted to design a food for zinc, you'd basically end up with an oyster. Eastern oysters contain about 39 mg of zinc per 100g (Pacific around 17 mg) — making them the single most zinc-dense food humans eat. The next-best food on this list (wheat germ) has less than half.

Oysters concentrate zinc from seawater and the phytoplankton they filter — a 100g serving can hold 100–300 times the zinc concentration of the surrounding water. They're also one of the very few foods where bioavailability is exceptional: humans absorb roughly 30–40% of the zinc in oysters, compared with ~15% from a typical plant meal.

The aphrodisiac reputation has a kernel of truth. Zinc is required for testosterone synthesis, and severe zinc deficiency genuinely impairs sexual function. But topping up zinc beyond an adequate level doesn't push libido higher — it's a deficiency correction, not a boost.

Safety notes worth knowing:

1. Raw oysters carry small but real food-safety risks — norovirus, Vibrio bacteria (especially dangerous for people with liver disease or weakened immunity), and occasionally hepatitis A.
2. Pregnant women, young children, older adults, and immunocompromised people should cook oysters (steam, fry, or stew until firm). Cooking preserves the zinc.
3. Oyster organs concentrate cadmium — a heavy metal — to levels that aren't dangerous in normal portions but make daily oyster-eating inadvisable, similar to tuna.

Plant zinc and the phytate problem

If you scanned the per-100g table, you might have noticed seeds and nuts cluster impressively high — pumpkin seeds match crab and lamb on paper. So why do the official guidelines tell vegetarians to eat 50% more zinc? Two words: phytic acid.

Phytate is how plants store phosphorus, and it's found in the same plant tissues that store zinc — seeds, nuts, legumes, whole grains. The problem is it binds zinc in your digestive tract, forming a complex your gut can't absorb. Net effect: zinc absorption from a typical plant meal is 10–25%, vs 25–40% from animal foods. Over time, that gap is large enough that the Institute of Medicine recommends vegetarians eat ~50% more.

The good news: phytate is easy to reduce if you know the techniques:

1. Soaking seeds, legumes and grains for 8–12 hours activates the plant's own phytase enzyme, cutting phytate by 15–30%.
2. Sprouting (germinating soaked seeds for 2–4 days) cuts phytate by 50%+ and releases more zinc for absorption.
3. Fermentation is the most powerful — sourdough has up to 90% less phytate than regular yeasted bread. Miso, tempeh, and other fermented soy products are similarly transformed.
4. Cooking alone has only modest effect (~15%), but combined with soaking it adds up.
5. Pairing with protein (especially animal protein, but also dairy) boosts plant-zinc absorption somewhat.

Hummus: the underrated zinc combo

Hummus is one of the cleverest plant-zinc dishes around — almost by accident. The two main ingredients sit in the upper half of our top-15 ranking: chickpeas contribute ~1.5 mg of zinc per 100g, and tahini (sesame paste) packs 4.6 mg per 100g. Blended together with olive oil and lemon, the final dip delivers roughly 1.6–1.7 mg of zinc per 100g — so a generous 100g serving (about half a small tub) covers ~20% of women's daily target in one sitting.

What makes it work even better: the lemon juice is mildly acidic, which helps liberate some of the phytate-bound zinc from the chickpeas, and the tahini's ground sesame is already partly de-phytated by the grinding process.

Zinc and immunity: what the evidence actually says

Zinc has been marketed as a cold remedy for decades. So what's actually true?

1. Zinc lozenges shorten cold duration by about 33% when taken within 24 hours of symptom onset at ~75–90 mg/day (zinc acetate or gluconate). Confirmed by the 2024 Cochrane review.
2. Zinc does NOT prevent colds. Daily zinc in healthy people doesn't reduce how often you get sick. The benefit is only during an active cold, and only if started fast.
3. Higher doses don't work better. Above ~90 mg/day there's no extra benefit, and side effects (nausea, metallic taste) increase.
4. Lozenges beat capsules for cold symptoms because zinc ions contact the throat tissue directly.
5. Never use zinc nasal sprays. The FDA warned in 2009 that intranasal zinc has caused permanent loss of smell. Zicam was pulled from US shelves over this.
6. Long-term high zinc harms immunity — over 40 mg/day for weeks suppresses copper, which is itself required for immune cells. Counterintuitively, too much zinc leaves you more vulnerable to infections.

Practical rule: if you feel a cold coming on, zinc acetate lozenges (13–14 mg per lozenge, every 2–3 hours up to ~75 mg total daily) for the duration of symptoms are evidence-backed. Otherwise, get your zinc from food and don't supplement long-term.

Zinc deficiency: signs and who's at risk

Severe zinc deficiency is rare in developed countries, but mild and subclinical deficiency is surprisingly common — the WHO estimates around 17% of the world's population has inadequate zinc intake. The classic signs develop slowly and are easy to attribute to other causes:

1. Slow wound healing — cuts and surgical wounds taking longer than usual.
2. Hair thinning or hair loss (telogen effluvium) — diffuse shedding across the scalp.
3. Loss of taste or smell — zinc is required for the gustin protein in taste receptors. New or persistent dulling can indicate low zinc (or, since 2020, lingering COVID).
4. Frequent infections — recurring colds, skin infections, chronic low-grade illness.
5. Persistent acne, eczema, or skin rashes that don't respond to usual treatments. Zinc-deficiency dermatitis is a recognised condition.
6. Chronic diarrhoea (and conversely, chronic diarrhoea worsens zinc deficiency — a vicious cycle).
7. In adolescents: delayed puberty, growth retardation, and reduced testicular development have been linked to childhood zinc deficiency in studies from cereal-heavy regions.

Who's most at risk:

1. Vegans and strict vegetarians — phytate inhibition plus no high-bioavailability animal zinc.
2. Older adults — reduced absorption with age, combined with lower overall intake.
3. People with GI disorders — Crohn's, celiac, ulcerative colitis, chronic diarrhoea.
4. Heavy drinkers — alcohol impairs zinc absorption and increases urinary loss.
5. Pregnant and breastfeeding women — the developing baby is a zinc sink.
6. Endurance athletes — meaningful zinc is lost through sweat.
7. People on long-term diuretics — increased zinc excretion.
8. Sickle cell and chronic kidney disease patients — multiple mechanisms reduce zinc status.

If several signs appear together — especially with a risk-group factor — ask your doctor for a serum zinc test. It's an imperfect biomarker (doesn't reflect total body zinc accurately) but it's the standard first-line test.

Zinc supplements: when they help, when they harm

Zinc is one of those nutrients where the line between "helpful" and "harmful" is thin and depends on dose and duration:

Helpful uses (evidence-backed):

1. During an active cold — 75–90 mg/day of zinc acetate lozenges for 5–7 days shortens duration.
2. Confirmed deficiency — short courses of 20–40 mg/day under medical supervision.
3. Age-related macular degeneration — the AREDS formula (with 80 mg zinc) reduces progression in intermediate AMD.
4. Diarrhoea in children in low-income settings — WHO recommends 20 mg/day for 10–14 days.

Harmful or unhelpful (avoid):

1. Daily zinc supplements above 40 mg in healthy adults — long-term excess depletes copper, causing anemia, neurological symptoms, and (counterintuitively) immune suppression.
2. Zinc nasal sprays — FDA warning since 2009 about permanent loss of smell.
3. Daily zinc to prevent colds — doesn't work and risks the harms above.
4. Zinc with iron or calcium supplements at the same time — they compete for absorption. Space by 2+ hours if you need both.

Zinc and copper: the absorption tug-of-war

Zinc and copper share the same intestinal transporters, so they're in a low-grade competition for absorption. In normal dietary amounts this works fine — varied diets land near the ideal ratio of about 10 mg of zinc per 1 mg of copper. The problem appears when zinc is pushed dramatically higher, usually through long-term supplementation.

Sustained zinc intake above ~40 mg/day signals your intestinal cells to produce metallothionein, a binding protein that traps copper inside those cells. When the cells turn over, the copper is shed in your stool instead of reaching your bloodstream. Over weeks this causes copper deficiency — anemia (fatigue, low red cell count), neurological symptoms (numbness, gait problems), and ironically weakened immunity. Classic case: someone taking high-dose zinc lozenges daily "to stay healthy" developing exactly the issues they were trying to prevent.

Practical rule: if you supplement zinc beyond ~25–30 mg/day for more than a few weeks, add 1–2 mg of copper. The AREDS macular-degeneration formula follows this — 80 mg zinc paired with 2 mg copper. Otherwise, varied food handles the ratio for you.

Frequently asked questions

Which food has the most zinc per 100g?
Oysters, by an enormous margin. Eastern oysters contain ~39 mg per 100g — roughly five times the next food. After oysters: wheat germ (17 mg), hemp seeds (9.9 mg), beef chuck (8.5 mg).

Can vegans get enough zinc?
Yes, with planning. Phytates reduce plant zinc absorption, so vegetarians need 30–50% more. Hemp seeds, pumpkin seeds, lentils, chickpeas, tahini, and wheat germ are the top sources. Soaking, sprouting, and fermenting (sourdough!) dramatically improve absorption.

Does zinc actually help with colds?
Yes — lozenges (75–90 mg/day, acetate or gluconate) taken within 24 hours of symptoms shorten duration by about 33%. Zinc does NOT prevent colds. Avoid zinc nasal sprays — FDA warned in 2009 they can permanently damage smell.

What are signs of zinc deficiency?
Slow wound healing, hair thinning, loss of taste or smell, frequent infections, persistent acne, chronic diarrhoea. Risk groups: vegans, older adults, people with Crohn's or celiac, heavy drinkers, pregnant women, endurance athletes.

How much zinc is too much?
The Tolerable Upper Intake Level is 40 mg/day for adults. Long-term excess depletes copper, causing anemia and neurological symptoms. Food-based zinc is self-regulating — supplements are the concern.

Sources & references

• U.S. Department of Agriculture. FoodData Central (SR Legacy). All nutrient values per 100g.
• National Institutes of Health Office of Dietary Supplements. Zinc: Health Professional Fact Sheet.
• Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. National Academies Press, 2001.
• Hunter J, Arentz S, et al. Zinc for the prevention or treatment of acute viral respiratory tract infections in adults. Cochrane Database of Systematic Reviews, 2024.
• World Health Organization. Zinc supplementation in childhood diarrhoea. WHO position paper.
• U.S. Food and Drug Administration. Public Health Advisory on Zicam intranasal zinc products, 2009.
• European Food Safety Authority. EFSA Dietary Reference Values for Zinc.

This article is for informational purposes only and is not a substitute for professional medical advice. If you suspect zinc deficiency, consult a qualified healthcare provider for blood testing before starting supplements.

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