Tulsi and Licorice: The Back-to-School Throat Duo

The tulsi and licorice pairing follows a classic Ayurvedic logic of complementarity: tulsi (Ocimum sanctum) to support the body against the season's stresses, licorice (Glycyrrhiza glabra) to soothe an irritated throat and ease coughing. It is a duo traditionally brewed as a tea at back-to-school time, a period when returning to group settings sets the first colds circulating.

This pairing has never been covered on its own on the site, unlike the other tulsi duos already published — tulsi and turmeric for general immunity, or vasaka and tulsi for congested bronchi. Here, the angle narrows to the throat, echoing our article sore throat at back-to-school time, which already mentioned tulsi alone.

Tulsi, a sacred herb that supports immunity

Tulsi, or holy basil, holds a central place in the Ayurvedic pharmacopoeia. Traditionally considered an adaptogen, it is reputed to help the body better withstand everyday stresses, including respiratory ones. A randomized, double-blind, crossover trial by Mondal, Varma, Bamola, Naik, Mirdha, Padhi, Mehta and Mahapatra (2011, Journal of Ethnopharmacology) evaluated the effect of a tulsi leaf extract in 24 healthy volunteers: participants receiving the extract showed increases in several immune markers (interferon-gamma, helper T cells, NK cells) compared with placebo.

Reference: Mondal S, Varma S, Bamola VD, Naik SN, Mirdha BR, Padhi MM, Mehta N, Mahapatra SC, Double-blinded randomized controlled trial for immunomodulatory effects of Tulsi (Ocimum sanctum Linn.) leaf extract on healthy volunteers, Journal of Ethnopharmacology, 2011, vol. 136, n° 3, p. 452-456 — see the PubMed listing.

This study looks at biological immune markers in healthy volunteers, not at actual cold prevention or a direct effect on the throat: it documents a plausible mechanism, without amounting to clinical proof of effectiveness against a respiratory infection.

Licorice, a soothing herb for the throat

fennel/">Licorice is traditionally used in Ayurveda, as in Western herbal medicine, for its soothing effect on throat mucosa and its expectorant action for coughs. The most solid clinical data on this ground, however, comes from a particular context: a randomized, double-blind trial by Ruetzler and colleagues (2013, Anesthesia & Analgesia) in 236 surgical patients showed that a licorice gargle (0.5g diluted in water) performed five minutes before anesthesia markedly reduced sore throat after intubation, compared with a sugar-water gargle — 19% versus 36% at 30 minutes, a gap that held at 4 hours.

Reference: Ruetzler K et al., A Randomized, Double-Blind Comparison of Licorice Versus Sugar-Water Gargle for Prevention of Postoperative Sore Throat and Postextubation Coughing, Anesthesia & Analgesia, 2013, vol. 117, p. 614-621 — see the Google Scholar page.

This study evaluates a mechanically caused sore throat, from intubation during surgery, not an ordinary viral sore throat like a back-to-school cold: licorice's soothing mechanism on the mucosa remains consistent with traditional use, but applying it to a cold context is an extrapolation, not directly demonstrated data.

Why combine the two rather than choose one?

In Ayurvedic logic, tulsi and licorice don't act on the same register: tulsi supports the general terrain and immunity, licorice targets local throat comfort locally. Combined in a tea, they cover two complementary needs rather than one redundant effect — a principle already applied in other duos on the site like tulsi and turmeric. Concretely, this means a tea of fresh or dried tulsi leaves with a small piece of licorice root or a pinch of licorice powder, steeped 8 to 10 minutes, taken once or twice a day from the first throat tickle onward.

Tulsi and licorice: a quick comparison

Herb	Traditional role	Available evidence level
Tulsi	General bodily support, adaptogen	Randomized trial on immune markers (healthy volunteers)
Licorice	Soothes the throat, expectorant effect	Randomized trial in a surgical context (post-intubation sore throat)
Combination	Covers general terrain plus local throat comfort	No study on the duo itself to date

Precautions

Licorice is the herb to watch closely in this duo: consumed in large amounts or over a prolonged period, it can raise blood pressure and disrupt potassium levels, due to the glycyrrhizin it contains. It is not advised in cases of hypertension, heart disease or kidney disease, and prolonged use should stay occasional (a few days) rather than an extended course. Tulsi is generally well tolerated as a tea at culinary doses, but can affect coagulation at concentrated doses: use caution if you're on anticoagulant treatment. This combination is not advised during pregnancy and breastfeeding without medical advice, nor in young children outside a very diluted, occasional use. A sore throat with high fever, difficulty swallowing or breathing, or one that persists beyond a week, calls for a medical consultation rather than extending self-treatment. For the site's overall precautions, see our safety and precautions guide.