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Tulsi तुलसी
Ocimum tenuiflorum · Lamiaceae
Also known as: Holy Basil, Ocimum sanctum
Part used: Leaf
Tulsi (Ocimum tenuiflorum) is holy basil, the plant most widely grown in Indian households and treated as sacred as well as medicinal. Ayurveda uses it for respiratory infection, fever, cough, stress and immunity, and it is among the most-used household remedies on the subcontinent.
| Rasa (taste) | Tikta (Bitter), Kashaya (Astringent) |
|---|---|
| Guna (qualities) | Laghu (Light), Ruksha (Dry) |
| Virya (potency) | Ushna (Hot) |
| Vipaka | Katu (Pungent) |
| Dosha | Balances Kapha & Vata |
| Prabhava | Classical systemic action |
Key takeaways
- Botanical name: Ocimum tenuiflorum
- Part used: Leaf
- Dosha action: Balances Kapha & Vata
- Typical dose: Fresh leaves: 5–10 chewed daily, or as tea/kadha; dried leaf powder 1–3 g.
Tulsi in other languages
Introduction
Tulsi (Ocimum tenuiflorum), or Holy Basil, is the sacred plant of Ayurveda — revered in Indian homes and prized as an adaptogen and respiratory tonic. Its aromatic leaves are used to support immunity, ease the airways and calm the mind against stress.
Classification
Of the Lamiaceae (mint) family, Tulsi is described among the aromatic, Kapha-Vata-pacifying herbs. Its pungent-bitter taste, light-penetrating qualities and heating potency make it clearing and warming for the respiratory system.
Uses & benefits
Tulsi is used in cough, cold and fever, in respiratory allergy, and as a daily Rasayana for immunity. Classical texts describe it as Kaphahara and Jwaraghna, and it is given as fresh leaf juice, decoction or with honey. It is also valued as a Medhya drug for stress.
Tulsi for cough and cold
The standard household remedy across India — fresh leaves or tea with ginger and honey, and a reasonable first measure.
Tulsi for fever
A classical Jwaraghna drug, used particularly in viral and recurrent fevers.
Tulsi for immunity
Taken as a daily tea through the cold months, and classed among the Rasayana drugs.
Tulsi for stress
Described as an adaptogen in modern terms, with traditional use for mental fatigue and low mood.
Tulsi for asthma
Used in Shwasa alongside the other respiratory drugs.
Tulsi for sore throat
Leaves chewed, or the decoction used as a gargle.
Tulsi for skin complaints
Applied externally in fungal infection and acne, and taken internally in chronic skin disease.
Tulsi for oral health
Used in tooth powders and as a mouth rinse for its antimicrobial action.
Tulsi for blood sugar
Named among the Pramehahara drugs with some preliminary modern support.
Tulsi as a household plant
Grown at the doorstep of millions of Indian homes, which is why it is the most accessible medicinal plant in the country.
Dosage — how much to take
Fresh leaves: 5–10 chewed daily, or as tea/kadha; dried leaf powder 1–3 g. Tulsi is commonly taken with honey for cough. Follow your Vaidya's advice for therapeutic use.
Dosage varies with age, constitution and condition — confirm with a qualified Vaidya.
Traditional uses — questions answered from the classical texts
Answers are drawn from the citations and properties recorded for this drug. No chapter-and-verse reference appears that the record does not carry.
Which classical texts describe Tulsi?
The citations held for Tulsi in this catalogue are: Charaka Samhita (Kasa-Shwasa context); Bhavaprakasha Nighantu (Pushpavarga).
What does the Charaka Samhita record about Tulsi?
Cited among herbs for cough and breathing. Reference: Charaka Samhita — Kasa-Shwasa context.
What does the Bhavaprakasha Nighantu record about Tulsi?
Described with respiratory, digestive and antimicrobial properties. Reference: Bhavaprakasha Nighantu — Pushpavarga.
What is Tulsi traditionally used for in Ayurveda?
Tulsi is used in cough, cold and fever, in respiratory allergy, and as a daily Rasayana for immunity. Classical texts describe it as Kaphahara and Jwaraghna, and it is given as fresh leaf juice, decoction or with honey. It is also valued as a Medhya drug for stress.
What are the Ayurvedic properties of Tulsi?
Rasa Tikta (Bitter), Kashaya (Astringent), Guna Laghu (Light), Ruksha (Dry), Virya Ushna (Hot), Vipaka Katu (Pungent). Dosha action: Balances Kapha & Vata. Prabhava: Classical systemic action.
Why is Tulsi classified the way it is?
In dravya-guna a drug's dosha action follows from its taste, qualities, potency and post-digestive effect. Tulsi carries Ushna (Hot) virya and Katu (Pungent) vipaka, which together give the recorded action: Balances Kapha & Vata.
Which part of Tulsi is used medicinally?
The part used is Leaf.
How much Tulsi is taken, and how?
Fresh leaves: 5–10 chewed daily, or as tea/kadha; dried leaf powder 1–3 g. Tulsi is commonly taken with honey for cough. Follow your Vaidya's advice for therapeutic use. Dosage varies with age, constitution and condition — confirm it with a qualified Vaidya.
When should Tulsi be avoided?
Generally very safe as a food herb. May mildly lower blood sugar; monitor if diabetic. Use under guidance in pregnancy and if trying to conceive.
Where does Tulsi grow?
Tulsi is an aromatic shrub cultivated in homes, temples and gardens across India, and grown widely through tropical and sub-tropical Asia in warm, sunny conditions.
Classical references
- Bhavaprakash Nighantu — Pushpavarga
Described with respiratory, digestive and antimicrobial properties. - Charaka Samhita — Kasa-Shwasa context
Cited among herbs for cough and breathing.
Modern research
-
A randomized, double-blind, placebo-controlled trial investigating the effects of an Ocimum tenuiflorum (Holy Basil) extract on stress, mood, and sleep in adults experiencing stress
(see source). Frontiers in Nutrition (2022)
An 8-week RCT (n=100) reporting reduced stress and lower salivary cortisol with a standardized Ocimum tenuiflorum extract versus placebo.
View study doi:10.3389/fnut.2022.965130 -
Double-blinded randomized controlled trial for immunomodulatory effects of Tulsi (Ocimum sanctum Linn.) leaf extract on healthy volunteers
Mondal S, Varma S, Bamola VD, et al.. Journal of Ethnopharmacology (2011)
A cross-over RCT reporting increased IFN-γ, IL-4 and T-helper and NK-cell percentages after Tulsi leaf extract, indicating immunomodulatory activity.
View study doi:10.1016/j.jep.2011.05.012
Safety & precautions
Generally very safe as a food herb. May mildly lower blood sugar; monitor if diabetic. Use under guidance in pregnancy and if trying to conceive.
Where it grows
Tulsi is an aromatic shrub cultivated in homes, temples and gardens across India, and grown widely through tropical and sub-tropical Asia in warm, sunny conditions.
Frequently asked questions
What is Tulsi used for?
Cough, cold, fever, sore throat, asthma, stress and immunity. It is the most widely used household remedy in India, taken as fresh leaves, tea or decoction, and is classed among the Rasayana drugs.
How many Tulsi leaves should I take daily?
Five to ten fresh leaves, chewed or steeped as tea. As a powder, 1–3 g per day. Classical practice discourages chewing the leaves directly on the teeth for long periods, as they are mildly acidic — steeping avoids this.
Does Tulsi affect fertility?
High doses have a documented anti-fertility effect in traditional accounts and some animal studies. Moderate the amount if you are trying to conceive. Ordinary culinary and tea quantities are not generally a concern.
Is Tulsi the same as basil?
Related but different. Tulsi is Ocimum tenuiflorum, more pungent and clove-scented. Sweet basil is Ocimum basilicum, used in cooking. They are distinct species with different uses, though both are Ocimum.
Can Tulsi be taken daily?
Yes — daily tulsi tea is normal practice across India and it is classed as a Rasayana suited to sustained use. Take breaks periodically, and moderate intake if you are trying to conceive.
Who should avoid Tulsi?
Take medical advice if you are trying to conceive, pregnant, on blood thinners, or diabetic — it may lower blood sugar. Stop about two weeks before surgery because of its effect on clotting.
Which type of Tulsi is medicinal?
Both Rama Tulsi (green) and Krishna Tulsi (purple) are used medicinally and are the same species, Ocimum tenuiflorum. Vana Tulsi (Ocimum gratissimum) is a related wild species used similarly.
