Honey is a genuinely useful remedy during the flu, particularly for relieving cough, soothing a sore throat, and improving sleep. It won’t cure influenza or shorten the infection on its own, but it performs as well as common over-the-counter cough medicines in clinical trials, with fewer side effects. The CDC includes honey on its short list of recommended approaches for managing cough during respiratory infections.
How Honey Compares to Cough Medicine
The most consistent evidence for honey during the flu involves cough suppression. A Cochrane review found no significant difference between honey and dextromethorphan (the active ingredient in most OTC cough syrups) at reducing cough frequency and severity. A separate study of 134 children with acute cough found that more than 50% cough reduction occurred in 80% of children given honey with milk, compared to 87% in the OTC medication group, a gap that was not statistically meaningful.
What tips the scale in honey’s favor is the side effect profile. Children given dextromethorphan reported more insomnia, and those given diphenhydramine (another common cough ingredient) experienced more drowsiness. In fact, a meta-analysis of eight pediatric trials covering 616 children found no evidence that OTC cough medicines worked better than a placebo for cough frequency, severity, or sputum production. Both common cough medications failed to outperform placebo for nighttime symptom relief. Honey, by contrast, consistently outperformed no treatment at all.
Why It Works on a Sore Throat
Honey is roughly 80% sugar by weight, which gives it two properties that matter when your throat is raw and inflamed. First, its thick viscosity creates a physical coating over irritated tissue, acting as a barrier that temporarily shields nerve endings from further irritation. Second, honey’s high sugar concentration creates osmotic pressure, meaning it naturally draws moisture out of swollen tissue and bacteria. This same mechanism pulls debris and dead cells away from inflamed areas, which is why honey has been used in wound care for centuries. When you swallow a spoonful during the flu, that coating effect calms the persistent tickle that triggers coughing.
Immune Support During Infection
Honey plays a dual role in the immune system that’s particularly relevant during a viral illness like influenza. It stimulates the proliferation of key immune cells, including T and B lymphocytes, the cells responsible for identifying and destroying infected cells and producing antibodies. It also promotes phagocytosis, the process by which immune cells engulf and digest viral particles and cellular debris.
The more interesting finding is that honey appears to modulate inflammation in both directions. It can stimulate the production of pro-inflammatory signaling molecules when the immune system needs to mount a response, and suppress those same molecules when inflammation becomes excessive. This balancing act is driven largely by honey’s antioxidant compounds, which help manage oxidative stress. During severe respiratory infections, runaway inflammation is often what causes the worst symptoms, so a food that supports immune activity without fueling excessive inflammation has real value as a supportive measure.
Early lab research also suggests honey may have direct antiviral effects. One study found that a specific type of honey significantly reduced influenza A virus infection and suppressed viral protein expression in cells, pointing to potential activity against the virus itself rather than just symptom relief. This line of research is still in its early stages, and drinking honey tea won’t replace antiviral medication for severe flu, but it adds another layer to honey’s usefulness.
Better Sleep When You’re Sick
Sleep is when your immune system does its heaviest repair work, and a persistent cough is one of the biggest sleep disruptors during the flu. A study published in JAMA Pediatrics enrolled 105 children aged 2 to 18 and compared honey, dextromethorphan, and no treatment. Children who received honey showed the greatest improvement in both cough severity and sleep quality, not just for the children themselves but for their parents as well. A single dose before bedtime was the approach used in most successful trials, and it consistently reduced nighttime coughing enough to improve rest.
How to Use Honey for Flu Symptoms
The most studied approach is simple: one to two teaspoons of honey taken 30 minutes before bedtime. You can swallow it straight, stir it into warm water or tea, or mix it with warm milk. One Italian trial specifically tested honey with milk and found strong results for cough reduction. Some trials used three doses spread throughout the day for ongoing daytime cough, with similar benefit.
The type of honey matters less than you might expect. Most clinical trials used buckwheat honey, eucalyptus honey, or wildflower honey, and all performed well. Darker honeys tend to have higher antioxidant content, so buckwheat or manuka varieties may offer a slight edge, but any pure, unprocessed honey should provide the coating and osmotic effects that drive symptom relief. Avoid heavily processed or flavored honey products, which may have reduced beneficial compounds.
Who Should Avoid Honey
Never give honey to a child under 12 months old. Honey can contain spores of the bacterium that causes botulism, and an infant’s immature digestive system cannot neutralize them the way an older child’s or adult’s can. The CDC is explicit on this point: no honey in food, water, formula, or on pacifiers for babies under one year.
If you have diabetes, honey requires some caution. Its glycemic index is 58, slightly lower than table sugar’s 60, and it causes a lower blood sugar spike than pure glucose. Studies in diabetic patients found that honey produced less of a rise in blood sugar than dextrose at most time intervals, but it still caused significant hyperglycemia. Honey is not a free pass for people managing blood sugar. A teaspoon or two for cough relief is a small amount, but if you’re using it multiple times daily throughout a week-long flu, the sugar adds up. Monitor your levels accordingly.
What Honey Cannot Do
Honey is a symptom management tool, not a flu treatment. It will not reduce the duration of influenza, kill the virus in your body, or prevent complications like pneumonia. For otherwise healthy adults, the flu typically resolves on its own, and honey can make the worst days more bearable. For people at high risk of complications, including older adults, young children, pregnant women, and those with chronic conditions, antiviral medications prescribed early in the illness remain the most effective intervention. Honey works well alongside those treatments, helping you cough less, sleep more, and stay comfortable while your immune system does the real work.