The first thing to do when you feel a cold coming on is act quickly. The earliest symptoms, that scratchy throat, a runny nose, mild fatigue, signal that a virus has already taken hold in your upper respiratory tract. You can’t stop a cold once it starts, but what you do in the first 24 to 48 hours can meaningfully shorten how long it lasts and how miserable you feel.
Start Zinc Lozenges Right Away
Zinc is the single most studied supplement for shortening a cold, and the evidence is strong. A meta-analysis of seven trials found that zinc lozenges reduced the average cold duration by 33%. Zinc acetate lozenges performed even better, cutting cold length by about 40%. The key is starting early and using a high enough dose: trials showing benefit used between 80 and 92 milligrams of elemental zinc per day, split across multiple lozenges throughout the day.
Higher doses (around 200 mg/day) didn’t improve results much beyond that 33 to 35% range, so more isn’t necessarily better. Look for lozenges that list the elemental zinc content, not just the total weight of the zinc compound. Zinc gluconate and zinc acetate are the two forms with the best evidence. Let the lozenge dissolve slowly in your mouth rather than chewing it, since the zinc needs direct contact with your throat and nasal passages to work.
Prioritize Sleep Above Everything Else
Sleep is not a nice-to-have when you’re fighting off a virus. It’s the single most important thing your immune system needs. People who habitually sleep five hours or less are significantly more vulnerable to respiratory infections compared to those sleeping seven to eight hours. Even one or two nights of poor sleep suppresses your body’s ability to produce the immune cells and antibodies that fight off a cold.
Sleep deprivation specifically impairs your T-cells, the white blood cells responsible for identifying and destroying infected cells. It also reduces the production of key signaling proteins your immune system uses to coordinate its response. When you feel that first tickle in your throat, aim for at least seven hours that night, and more if you can manage it. Cancel evening plans. Go to bed early. This is the highest-impact intervention you have.
Stay Hydrated to Keep Mucus Thin
Your respiratory tract is lined with a thin layer of mucus that traps and clears viruses. In healthy airways, that mucus is about 90 to 98% water. When you’re dehydrated, your body pulls water from that mucus layer first, making it thicker and harder to clear. Thick, sticky mucus is less effective at trapping pathogens and more likely to cause that plugged-up, congested feeling.
Adding fluids to your system does the opposite: extra water preferentially dilutes the mucus layer, keeping it thin and mobile. There’s no magic number of glasses per day, but drink enough that your urine stays pale. Warm liquids like tea, broth, and soup have the added benefit of soothing an irritated throat and helping loosen congestion through steam.
Rinse Your Nasal Passages With Saline
Saline nasal irrigation, whether from a spray bottle, squeeze bottle, or neti pot, physically washes viral particles out of your nasal cavity. A systematic review found that nine out of ten studies on saline-based nasal rinsing showed positive effects in reducing viral load, with benefits including faster clearance of the virus and reduced transmission to others. Both isotonic (matching your body’s salt concentration) and hypertonic (slightly saltier) solutions were effective.
You can buy pre-made saline sprays at any pharmacy, or mix your own with distilled or previously boiled water and non-iodized salt. Rinsing two to three times a day during the early stages of a cold helps keep viral numbers low in the place where the infection is concentrated. It also relieves nasal congestion without the rebound effect that medicated decongestant sprays can cause.
Consider Elderberry and Vitamin C
Elderberry extract has some promising evidence behind it. In a randomized, double-blind trial of 312 air travelers, those taking elderberry experienced colds that lasted about two days shorter on average (4.75 days versus 6.88 days) and had noticeably lower symptom severity scores. The participants started supplementation before getting sick, which suggests elderberry may be most useful when taken at the very first sign of illness or even during high-risk periods like travel.
Vitamin C is a more modest player. A meta-analysis found that taking at least 1 gram per day reduced cold severity by about 15% overall, but the benefit was concentrated in more severe symptoms rather than mild ones. In other words, vitamin C probably won’t make a slight sniffle go away faster, but it may take the edge off the worst days of a cold. It had no significant effect on the duration of mild symptoms. If you’re going to take it, start as soon as symptoms appear and continue through the cold.
Use Honey for a Sore Throat and Cough
If your early symptoms include a scratchy throat or cough, honey outperforms standard over-the-counter cough suppressants. In head-to-head comparisons, honey produced a 59% improvement in cough and sleep scores, compared to 45% for the active ingredient in most cough syrups and 31% for no treatment at all. Honey was statistically superior in multiple paired comparisons.
A spoonful of honey straight, or stirred into warm water or tea, coats and soothes the throat. It’s a particularly good option at bedtime when coughing tends to be most disruptive. One important note: honey should never be given to children under one year old due to the risk of botulism.
Let a Mild Fever Do Its Job
Your instinct when you start feeling warm may be to reach for a fever reducer, but a mild fever is actually one of your body’s most effective weapons against a virus. Elevated temperature slows viral replication by interfering with how viruses enter cells and copy their genetic material, while simultaneously boosting your immune defenses.
The benefit holds at the lower end of the fever range, roughly 38 to 39°C (100.4 to 102.2°F). Above about 39 to 40°C (102.2 to 104°F), the damage from the fever itself starts to outweigh the antiviral benefits, with risks including inflammation in the lungs and reduced integrity of the blood-brain barrier. So if your temperature is mildly elevated and you’re not in significant discomfort, consider riding it out. If your fever climbs above 103°F, or you feel truly awful, treating it is reasonable.
What Not to Waste Your Time On
Antibiotics do nothing for a cold. Colds are caused by viruses, and antibiotics only work against bacteria. Taking them unnecessarily contributes to antibiotic resistance without helping you feel better a single day sooner.
Megadoses of any single supplement beyond what’s been studied won’t give you extra protection. Taking 5,000 mg of vitamin C instead of 1,000 mg, for example, just results in your kidneys filtering out the excess. Similarly, medicated nasal decongestant sprays provide temporary relief but can cause rebound congestion if used for more than two or three days, making things worse in the long run.
The most effective strategy is combining the basics: zinc lozenges early, serious sleep, good hydration, nasal rinsing, and patience. Most colds resolve in 7 to 10 days regardless, but these steps can realistically shave two to three days off that timeline and reduce your worst symptoms by a meaningful margin.