Ayurvedic Herbs for Cold and Flu: Evidence Guide

Quick answer. A handful of Ayurvedic herbs can ease cold and flu symptoms, but none cures the infection. The most-studied are ginger, licorice (mulethi), turmeric and peppermint, which may help with cough, sore throat and congestion; tulsi may support immune function; giloy is traditionally used for recurrent fevers. Brewing them into a warm kadha is a sensible comfort measure. See a doctor for high fever, breathing trouble, or symptoms lasting beyond 7-10 days.

Most of us reach for the kitchen before the pharmacy when a sore throat or runny nose starts: a cup of ginger-tulsi kadha, a pinch of haldi in warm milk, a giloy tablet someone in the family swears by.

This guide answers a simple question honestly: which Ayurvedic herbs are actually worth using for a cold or flu, and what does the research really show?

By the end you'll know the evidenced shortlist, how to brew a sensible kadha, and the cautions the "cures cold in one day" listicles leave out, without overpromising.

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Which Ayurvedic herbs help with cold and flu?

The short answer: the Ayurvedic herbs with the most human and pharmacological support for cold and flu symptoms are ginger, licorice (mulethi), turmeric and peppermint, with tulsi adding immune-support signals and giloy carrying a long traditional use for recurrent fevers.

What they share is that they target comfort (cough, sore throat, a blocked-up feeling) rather than the virus itself. A 2023 monograph review in Drugs in Context identified ginger, liquorice, turmeric and peppermint as the four most-studied herbs for common-cold symptom management, and was explicit that the evidence leans on traditional use and lab pharmacology, with only limited clinical trials and no demonstrated antiviral cure [1].

So the honest framing is this: these herbs may ease how a cold feels, not how long the infection lasts. Keep reading for what each one actually does, and which one to be careful with.

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The herbs with the most evidence for cold symptoms

Here is the evidence-graded shortlist. For each herb you get the Sanskrit and botanical name, its traditional use, and what human research currently shows. Throughout, "may support" and "may ease" are deliberate. Most of this rests on traditional use plus small or preclinical studies.

Ginger (Adrak / Zingiber officinale)

Ginger is the warming kitchen herb most people reach for first, traditionally used in Ayurveda as a dipana (digestive kindler) and a go-to for cough and cold. The Drugs in Context review cites a Health Canada monograph describing ginger as an expectorant and antitussive to relieve symptoms of bronchitis, cough and colds, with its active compounds (gingerols, shogaols) shown in the lab to dampen inflammatory mediators [1]. In plain terms: ginger has long been used to help loosen mucus and ease a cough. The clinical evidence is limited, so treat it as a sensible comfort measure rather than a proven treatment.

Licorice / Mulethi (Yashtimadhu / Glycyrrhiza glabra)

Mulethi is the classic Ayurvedic throat herb (Yashtimadhu), valued as a demulcent, something that coats and soothes. The same review notes that glycyrrhizin, licorice's key compound, has an expectorant action and that WHO monograph use supports licorice as a demulcent for sore throat and an expectorant for bronchial mucus [1]. So mulethi may soothe a scratchy throat and help loosen mucus. Important: licorice is not for daily, long-term use. See the cautions section for its blood-pressure and pregnancy concerns.

Turmeric (Haldi / Curcuma longa)

Haldi needs no introduction in an Indian kitchen, traditionally used for its anti-inflammatory reputation and famously stirred into warm milk at the first sign of a cold. The evidence here is the most promising but also the thinnest: the review reports that one clinical study found a curcumin supplement reduced common-cold symptoms and shortened symptom duration, an encouraging but modest, single-study result that is not yet confirmed [1]. Enjoy your haldi doodh; just do not expect it to cut a cold short on its own.

Peppermint / Pudina (Mentha piperita / menthol)

Pudina and its active compound menthol give that clear-breathing sensation many people chase when congested. The review describes a study in healthy volunteers where inhaled peppermint significantly reduced the number of coughs following an experimentally evoked stimulus, with menthol acting on cold-sensing TRPM8 receptors [1]. Read carefully: this is reduced evoked (deliberately triggered) cough, not proof it stops a spontaneous cold cough. The fair takeaway: menthol may make breathing feel clearer and may ease the cough sensation.

Tulsi (Holy basil / Ocimum sanctum)

Tulsi, the "Queen of Herbs" and a classical rasayana, is the plant most Indian households associate with respiratory and immune support. A 2017 systematic review of 24 human studies found tulsi was linked to favourable outcomes including immune markers (such as increased natural-killer and T-helper cells) and was well tolerated, with most studies reporting no significant adverse events [2]. But these are mostly small, varied trials measuring surrogate immune markers or symptoms, so tulsi may support immune function. It is not shown to prevent or cure a cold or flu.

Giloy / Guduchi (Tinospora cordifolia)

Giloy (Guduchi, the "Amrita" or nectar herb) is traditionally used as an immunomodulator, including for recurrent and seasonal fevers. A 2023 pharmacology review lists immune-modulatory activity among Tinospora cordifolia's properties and notes its traditional use for fevers [3]. The honest grade is low: this is traditional use plus lab and animal data, and the human evidence specifically for cold and flu is weak. Giloy also carries a documented liver-safety signal in India, so every giloy mention here comes paired with a caution. Read the cautions section and our deeper giloy guide before using it. Do not take giloy long-term without medical supervision.

Important: most of these studies are small, short-term, monograph-based or animal/lab work. Treat the evidence as suggestive, not definitive, and remember none of these herbs has been shown to cure or prevent a cold or the flu.

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How to make a simple immunity kadha at home

A kadha (or kwath) is a traditional simmered herbal decoction, a home remedy, not a clinical medicine. Here is a simple, comforting version using the herbs above.

A simple immunity kadha

1. Add to 2 cups of water: 1 inch fresh ginger (crushed), 5-6 tulsi leaves, 4-5 black peppercorns, a small stick of mulethi (or a pinch of mulethi powder), 1 small cinnamon stick, and a small pinch of turmeric.
2. Simmer on low for about 10-15 minutes, until the water reduces to roughly one cup.
3. Strain into a cup. You can add a little honey or a squeeze of lemon once it has cooled slightly (do not boil honey).
4. Drink warm, traditionally once or twice a day.

This is traditional guidance for comfort, not a dose with a proven effect on how long a cold lasts. A kadha is best treated as a warm, soothing ritual while you rest and hydrate.

Dosage and ingredients vary by age, body type (prakriti), and condition. The amounts above are traditional home practice, not a clinical dose. If you are pregnant, hypertensive, on medication, or unsure, consult a qualified practitioner, and note the licorice (mulethi) caution below.

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Can Ayurvedic herbs cure a cold or make it go faster?

This is the honest heart of the post: no Ayurvedic herb, and no remedy of any kind, has been shown to cure a cold or the flu. The common cold and influenza are viral infections that your immune system clears on its own.

Most colds resolve in about 7-10 days regardless of what you take. The central review on these herbs was explicit that no antiviral cure has been demonstrated and that some of the benefits people feel are subjective [1]. What the better-supported herbs may do is make the symptoms more bearable while your body does the work: ease a cough, soothe a throat, help you feel less congested.

That is genuinely useful, and it is also the whole, truthful claim. If a product or article promises to "cure your cold in one day," that is a claim the evidence does not support.

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What Ayurveda says to avoid during a cold

This section reflects traditional Ayurvedic concepts, not clinical findings. It is included because readers ask, and it is honest to label it as tradition.

In Ayurvedic thinking, a cold with congestion is often seen as a *kapha*-aggravating state, and tradition suggests easing off foods believed to increase kapha and "heaviness":

• Cold and iced drinks: traditionally avoided in favour of warm fluids.
• Curd and heavy dairy, especially at night: considered kapha-aggravating in classical practice.
• Fried, oily and very heavy meals: tradition leans toward light, warm, easily digested food.
• Excess sugar and very cold sweets.

To be clear: this is traditional guidance about comfort and digestion. There is no clinical evidence that avoiding curd or sugar shortens a cold. The genuinely useful, well-supported basics during any cold are warm fluids, rest and hydration.

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When NOT to rely on home remedies: cautions

Herbs and kadha are for mild, self-limiting colds. Please take the following seriously.

• Giloy (Tinospora cordifolia) and liver safety. Giloy has been linked to documented cases of liver injury in India, including an autoimmune-like hepatitis. A 2021 case series described six patients who developed acute hepatitis after taking giloy as an immune booster [4], and a larger 2022 multicentre study reported 43 such cases ranging from acute hepatitis to acute liver failure [5]. The causal interpretation has been debated, which is exactly why supervision matters. Anyone with existing liver disease, an autoimmune condition, or on multiple medications should be especially cautious, and no one should take giloy long-term without medical supervision. Stop and see a doctor for yellowing of the eyes or skin, dark urine, or persistent fatigue.
• Licorice / mulethi (blood pressure and pregnancy). Regular or high intake of glycyrrhizin can raise blood pressure and lower potassium. Use mulethi occasionally, not daily, and avoid it if you are pregnant, have hypertension, or have heart or kidney disease, or are on diuretics, unless a doctor approves.
• Drug interactions. Several of these herbs can interact with prescription medicines (including blood-pressure, blood-thinner and immune-affecting drugs). If you take regular medication, check with your doctor before adding concentrated herbal supplements.
• Pregnancy and lactation. Treat concentrated herbal supplements with caution and consult your doctor; mulethi in particular is best avoided.
• Children, elderly and immunocompromised people. Be conservative, and seek medical advice rather than self-treating.
• Red flags, see a doctor, do not rely on home remedies, if there is: high or persistent fever, difficulty breathing, chest pain, symptoms lasting beyond 7-10 days or worsening, or any cold-like illness in infants, the elderly, pregnant women, or people who are immunocompromised.

If you are managing a chronic condition or taking prescription medication, please consult your doctor before starting any new supplement.

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Our take: herbs at the first sign of a cold

At KayaSuddhi we think the sensible approach is the boring one: at the first scratch of a sore throat, brew a warm ginger-tulsi-mulethi kadha, hydrate, and rest. These herbs may make the days more comfortable (that is a real and worthwhile thing), but the recovery itself is your immune system's work, on roughly its own timeline.

We keep tulsi and giloy in our thinking because they are among the herbs traditionally used to support immune wellness, and our KayaSuddhi immunity range is formulated with that traditional support in mind rather than any promise to treat illness. If a formula contains giloy, the liver-safety caution above always applies. It is not a herb to take casually or long-term.

For the bigger picture (how immunity-support herbs fit together year-round), see our complete guide to Ayurvedic immunity boosters.

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Frequently asked questions

Which ayurvedic herb is best for cold and cough?

There is no single "best" herb. For cough and sore throat, ginger (adrak) and licorice (mulethi) have the most traditional and pharmacological support as expectorant and demulcent herbs [1]. For general immune support, tulsi is the most-studied [2]. None cures a cold. They may ease symptoms while your body clears the infection. A simple kadha combining a few of them is a sensible comfort measure.

How do I take giloy for fever?

Traditionally, giloy (Guduchi) is taken as a juice, churna or tablet, sometimes more often during illness. But the human evidence for fever is weak, and giloy carries a documented liver-injury signal in India [4]. Do not self-treat a fever with giloy: dosage varies by age and condition, it should not be used long-term without medical supervision, and a persistent or high fever needs a doctor. See our dedicated giloy guide for detail.

How long should kadha simmer, and how long does it take to work?

Traditionally a kadha is simmered on low heat for about 10-15 minutes, until roughly half the water has reduced. As for "working", a kadha is a comfort measure, not a cure, so it may make a sore throat or cough feel more soothing soon after drinking, but it does not shorten the infection itself. Most colds resolve in 7-10 days regardless [1].

Is tulsi good for cough?

Tulsi (holy basil) is traditionally used for respiratory and immune support, and a systematic review of human studies found favourable, well-tolerated outcomes including immune-marker improvements [2]. So tulsi may support immune function and is a sensible, gentle addition to a kadha. However, the studies mostly measure surrogate markers or symptoms. Tulsi is not proven to cure a cough or infection.

What is the best kadha for cold and cough?

A simple, balanced home kadha uses ginger, tulsi, black pepper, mulethi, a little cinnamon and a pinch of turmeric, simmered in water for 10-15 minutes and taken warm. There is no single "best" recipe and no kadha cures a cold. It is a comforting, traditional way to take these symptom-soothing herbs together. Avoid heavy mulethi if you are pregnant or hypertensive.

Can ayurvedic herbs cure a cold faster?

No. No herb has been shown to cure a cold or the flu or to reliably make it go away faster. The central review on these herbs found no demonstrated antiviral cure [1]. Most colds resolve in about 7-10 days on their own. What better-supported herbs like ginger and mulethi may do is ease symptoms (cough, sore throat, congestion) while you recover.

How to make immunity kadha at home?

Simmer 2 cups of water with crushed ginger, a few tulsi leaves, black peppercorns, a small piece of mulethi, a cinnamon stick and a pinch of turmeric for about 10-15 minutes until reduced by half. Strain, and add a little honey or lemon once slightly cooled. Drink warm, traditionally once or twice a day. This is a comfort ritual, not a clinical dose. Adjust to taste and consult a practitioner if unsure.

Is mulethi (licorice) good for sore throat?

Mulethi (Yashtimadhu) is a classic Ayurvedic throat herb, and monograph evidence supports licorice as a demulcent for sore throat and an expectorant for mucus [1]. So it may soothe a scratchy throat. Use it occasionally, not daily: regular high intake of its glycyrrhizin can raise blood pressure and lower potassium, and it should be avoided in pregnancy, hypertension, and heart or kidney disease.

What should I avoid during a cold according to Ayurveda?

This is traditional Ayurvedic guidance, not a clinical finding: Ayurveda traditionally suggests easing off cold and iced drinks, heavy dairy and curd (especially at night), and fried, oily, very heavy or very sweet foods, which are seen as kapha-aggravating during congestion. The genuinely well-supported basics during any cold are warm fluids, rest and good hydration. Avoiding curd has not been shown to shorten a cold.

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Related reading

• Giloy (Guduchi) benefits, uses, dosage and side effects - including the liver-safety reports in detail
• Tulsi for immunity: how to use it daily
• Ayurvedic immunity boosters: the complete India guide - the full pillar guide

Sources

1. Wardani RS, Schellack N, Govender T, Dhulap AN, Utami P, Malve V, Wong YC. Treatment of the common cold with herbs used in Ayurveda and Jamu: monograph review and the science of ginger, liquorice, turmeric and peppermint. Drugs Context. 2023;12:2023-2-12. https://doi.org/10.7573/dic.2023-2-12 (PMID 37342461)
2. Jamshidi N, Cohen MM. The Clinical Efficacy and Safety of Tulsi in Humans: A Systematic Review of the Literature. Evid Based Complement Alternat Med. 2017;2017:9217567. https://doi.org/10.1155/2017/9217567 (PMID 28400848)
3. Ahsan R, Mishra A, Badar B, Owais M, Mishra V. Therapeutic Application, Phytoactives and Pharmacology of Tinospora cordifolia: An Evocative Review. Chin J Integr Med. 2023;29(6):549-555. https://doi.org/10.1007/s11655-023-3733-2 (PMID 37017881)
4. Nagral A, Adhyaru K, Rudra OS, Gharat A, Bhandare S. Herbal Immune Booster-Induced Liver Injury in the COVID-19 Pandemic - A Case Series. J Clin Exp Hepatol. 2021;11(6):732-738. https://doi.org/10.1016/j.jceh.2021.06.021 (PMID 34230786)
5. Kulkarni AV, Hanchanale P, Prakash V, et al. Tinospora Cordifolia (Giloy)-Induced Liver Injury During the COVID-19 Pandemic - Multicenter Nationwide Study From India. Hepatol Commun. 2022;6(6):1289-1300. https://doi.org/10.1002/hep4.1904 (PMID 35037744)

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About this content. This article is for educational purposes only and is not medical advice. These statements have not been evaluated by AYUSH or FSSAI as treatment claims. KayaSuddhi products are purely herbal and not intended to diagnose, treat, cure, or prevent any disease. Results may vary. Please consult your physician or a qualified BAMS-certified Ayurvedic practitioner before starting any new supplement — especially if you are pregnant, breastfeeding, on prescription medication, or managing a chronic condition.