Natural Remedies for Cold and Flu
Down and miserable with a cold? Or has the flu been making a plaything out of you? Most colds clear up on their own within 7 to 10 days, and a handful of natural remedies, vitamin C, zinc lozenges, garlic, and salt water gargles, can ease symptoms and shave a day or two off how long they stick around.
This article covers some proven natural home remedies to help kick the sniffles out of your system, and have you feeling like yourself again.
- Expected Duration: Uncomplicated colds and flu typically resolve naturally within 7 to 10 days.
- The Antibiotic Rule: Both are viral infections. Antibiotics will not cure them and may negatively impact your gut microbiome.
- Evidence-Backed Relief: High-dose zinc lozenges and activated allicin (crushed garlic) demonstrate the strongest clinical efficacy for shortening illness duration.
- Symptomatic Comfort: Warm saline gargles and turmeric preparations safely soothe throat irritation and loosen mucosal congestion.
What causes colds and flu?
Viruses cause both. That’s why antibiotics don’t help; antibiotics only work against bacteria, not viruses. What does help is rest, fluids, and a few natural remedies backed by real evidence.
How to tell a cold from the flu
A rhinovirus causes the common cold, while the influenza virus causes the flu. The flu tends to come on suddenly, often within a few hours, with fever, chills, and body aches. A cold usually come on gradually over 2 to 3 days, and stays milder.
Cold and flu spread through coughing, sneezing, and hand contact, which is why regular handwashing matters.
Symptoms of cold and flu
Cold and flu has almost similar symptoms:
- Blocked sinuses
- Runny nose
- Sore throat
- Fever
- Chills
- Body aches
- Headaches
- Coughing
The flu’s version of these symptoms tends to be more intense and arrives faster.
5 Natural remedies for cold and flu
There’s no cure for flu and cold, but a few things can ease symptoms and shorten how long they stick around.
The remedies below aren’t equally backed by evidence, some have a real, measurable effect, others are more about comfort than cure, and it’s worth knowing the difference before you spend money on them.
1. Garlic
Garlic is a very effective natural remedy for the cold and the flu because it contains allicin, a compound with antiviral properties.
2. Vitamin C
Taking vitamin C regularly, before you get sick, reduces cold duration by about 8% in adults and 14% in children, according to a Cochrane review of placebo-controlled trials.
Starting a high dose after symptoms have already begun hasn’t shown the same benefit in most trials, though it may still help if you’re under heavy physical stress, like training outdoors in cold weather.
Most of us grew up being handed a glass of orange juice or an effervescent tablet the moment we sneezed, as if it were some kind of cold-fighting ritual passed down through the generations.
Truth is, vitamin C isn’t the miracle our parents made it sound like. It has only a little effect, 8% reduction in cold duration means a 10-day cold might end up being 9 days instead.
However, it’s worth taking seriously if you’re someone under real physical strain, an athlete, or someone working outdoors in cold conditions, since the evidence there is much stronger. Eating vitamin C-rich foods regularly probably gets you most of the benefit anyway.
3. Turmeric
Turmeric is a traditional spice, that is native to India, and widely known and used for its medicinal properties. The primary active ingredient in turmeric is curcumin; it has anti-fungal, anti-viral, and anti-inflammatory effects. Moreso it is a potent antioxidant.
Consumption of turmeric or taking a mixture of turmeric and honey can aid in soothing a sore throat and a cough.
4. Salt solution
Salt solution, which involves mixing water and salt, is another natural remedy for colds and flu. Gargling warm salt water helps clear viruses and bacteria from the throat. For a stuffy nose, saline nasal drops or a saline spray work the same way.
5. Zinc Lozenges
Another natural remedy for cold and flu is zinc lozenges. A 2024 Cochrane review found that zinc lozenges may shorten cold duration by around 2 days on average, though the certainty of this evidence is rated low.
Earlier trials using zinc acetate lozenges at doses above 75mg of elemental zinc per day showed larger reductions, around 33% shorter colds, but lower-dose lozenges (which make up most products on shelves) showed no benefit at all.
When to see a doctor
A cold typically clears up within 7 to 10 days, though it can take up to 3 weeks to fully resolve. The flu usually follows a similar timeline but starts harder and faster.
