Immune-Boosting Foods: What to Eat to Support Your Immune System
The best foods for the immune system are the ones that supply vitamin C, vitamin D, zinc, vitamin A, protein and fibre. Food sources for each, a simple eating pattern, what to limit, and where supplements fit.
Short answer: no single food “boosts” immunity, but the immune system needs vitamin C, vitamin D, zinc, vitamin A and protein to work normally, and a fibre-rich diet supports a healthy gut. The best foods for the immune system are ordinary whole foods in a varied diet. Falling short can weaken your defences; extra on top of enough has not been shown to add much.
Vitamin C: beyond orange juice
Vitamin C is an antioxidant the immune system needs to work normally. Besides oranges, red and green peppers, kiwi, strawberries, broccoli and Brussels sprouts are good sources; cooking reduces vitamin C, so eat some raw. Adults need 75 mg (women) to 90 mg (men) a day (US values), which a few servings of fruit and vegetables usually cover. Large supplement doses have not been shown to prevent colds in most people.
Zinc-rich foods
Zinc is needed for immune cells to develop and work properly. Oysters are the richest source; red meat, poultry, beans, chickpeas, lentils, nuts, pumpkin seeds and fortified cereals also provide it. Zinc from plant foods is absorbed less well, which matters for vegetarians.
Vitamin D: the sunshine nutrient
Vitamin D helps the immune system fight bacteria and viruses. Few foods contain much: fatty fish (salmon, mackerel, sardines), egg yolks and fortified milk, plant drinks and cereals. The skin makes it in sunlight, so people who get little sun may run low; ask your doctor whether a test or supplement makes sense.
Vitamin A and protein
Vitamin A helps keep the linings of the gut and airways healthy. Sources: sweet potatoes, carrots, pumpkin, spinach, kale, eggs and dairy. High-dose vitamin A supplements can be harmful, so food is the better route.
Protein supplies the building blocks for antibodies and immune cells; fish, poultry, eggs, dairy, beans, lentils, tofu and nuts all count.
Gut-friendly foods: fibre and fermented foods
Much of the body’s immune tissue sits in and around the gut. Fibre from vegetables, fruit, whole grains, beans and nuts feeds gut bacteria. Fermented foods such as yogurt and kefir with live cultures, kimchi, sauerkraut and miso add beneficial bacteria, though research on their effect on immunity in people is still developing.
Anti-inflammatory foods and spices
Eating patterns rich in vegetables, fruit, whole grains, legumes, nuts, olive oil and fish, such as the Mediterranean diet, are associated with lower inflammation. Turmeric and ginger are fine in cooking, but evidence that they strengthen immunity in people is limited.
Foods and habits to limit
- Added sugar: linked with weight gain, tooth decay and poorer overall health; the WHO advises keeping free sugars below 10% of daily energy intake.
- Alcohol: drinking too much can weaken the immune system and make infections more likely.
- Ultra-processed foods: often high in sugar, salt and unhealthy fats and low in fibre; eating a lot of them is linked with poorer health.
- Trans fats: found in some fried and packaged foods; best avoided.
Sleep, physical activity, not smoking, managing stress and recommended vaccinations matter too.
A simple eating pattern for immune health
Fill half your plate with vegetables and fruit, add protein and a whole grain, and cook with plant oils. An example day:
- Breakfast: plain yogurt with berries, oats and pumpkin seeds.
- Lunch: a salad with leafy greens, red pepper, chickpeas and an olive oil dressing.
- Snack: a kiwi and a handful of cashews.
- Dinner: baked salmon with broccoli, sweet potato and a spoonful of sauerkraut.
With a medical condition or restricted diet, a doctor or dietitian can help you plan.
Where does HemoHIM fit?
HemoHIM is a Korean liquid supplement of Angelica gigas, Cnidium officinale and peony root extracts with honey and corn syrup. In South Korea it is a registered health functional food with the claim that it “may help improve immune function”, based on a few small human trials, partly by its developer (see the clinical studies and what HemoHIM is). The label also lists other ingredients, such as fructo-oligosaccharide, guar gum and small amounts of vitamins; check the label for your country.
Two honest points. It contains sugar — 2.5 g per 20 ml sachet on the US label, and the Korean label’s intake is one sachet twice a day. And it is not a substitute for a balanced diet: it does not supply the vitamins, minerals, protein or fibre above. Children and pregnant or breastfeeding women should not take it; people on blood thinners or immunosuppressants, or with autoimmune or liver disease, should ask a doctor. In 2021 Hong Kong and Taiwan warned against it after liver-injury cases and methoxsalen findings; whether HemoHIM caused them is debated — see side effects and safety. As of October 2026, HemoHIM is sold again in Atomy’s Singapore mall and, as HemoHIM G (艾多美 煥力飲G), in Atomy’s Taiwan mall; it is still not sold in Hong Kong.
Disclosure: this site is run by an independent Atomy distributor. See also medicinal mushrooms and immunity.
❓ What are the best foods for the immune system?
There is no single best food. A varied diet with plenty of vegetables and fruit (vitamin C and vitamin A), fatty fish and eggs (vitamin D), meat, seafood, beans, nuts and seeds (zinc and protein), whole grains and fermented foods (fibre and gut health) supplies the nutrients the immune system needs to work normally.
❓ Is turmeric good for immunity?
Curcumin, a compound in turmeric, has been studied in the laboratory, but there is little good evidence that turmeric strengthens immunity in people. It is fine as a spice in cooking; if you consider a turmeric supplement, ask your doctor or pharmacist, especially if you take other medicines.
❓ Does sugar weaken the immune system?
The evidence on sugar and immunity specifically is limited. What is well established is that diets high in added sugar are linked with poorer overall health, so the WHO advises keeping free sugars below 10% of daily energy intake. Limiting added sugar is sensible for general health.
❓ Can a supplement replace immune-boosting foods?
No. Supplements can help correct a diagnosed deficiency, but they do not replace a balanced diet. HemoHIM, for example, contains sugar (2.5 g per sachet on the US label) and does not provide the vitamins, minerals, protein or fibre that whole foods do.
Want to try HemoHIM? Buy it genuine directly from Atomy — registration is free.
References
- Dietary Supplements for Immune Function and Infectious Diseases — Fact Sheet for Consumers — NIH Office of Dietary Supplements
- Vitamin C — Fact Sheet for Consumers — NIH Office of Dietary Supplements
- Zinc — Fact Sheet for Consumers — NIH Office of Dietary Supplements
- Vitamin D — Fact Sheet for Consumers — NIH Office of Dietary Supplements
- Healthy diet — Fact sheet — World Health Organization
- Using Dietary Supplements Wisely — National Center for Complementary and Integrative Health
This article is for general information and is not medical advice. Talk to a doctor or pharmacist before taking supplements, especially if you are pregnant, breastfeeding, take medicines or have a medical condition.
Where to buy genuine HemoHIM
Check whether HemoHIM is sold in your country and the member price in Atomy’s official mall.
Check availabilityThis site is run by an independent, registered Atomy distributor. If you register through our links, we may earn a commission. Prices are the same.