🪷Ayurveda🌿Western Herbalism

Holy Basil (Tulsi)

Ocimum tenuiflorum

About Holy Basil (Tulsi)

Holy Basil (Tulsi) (Ocimum tenuiflorum) is a herb used in the Ayurveda and Western Herbalism traditions to help with Stress, Anxiety, Common Cold, and Gut Health, among 5 other conditions it addresses. The leaves and seeds are the parts traditionally used, used both internally and topically.

Botanical background

Ocimum tenuiflorum (synonym Ocimum sanctum), commonly known as holy basil, tulasi (sometimes spelled thulasi) or tulsi, is an aromatic perennial plant in the family Lamiaceae which is native to the Indian subcontinent and widespread as a cultivated plant throughout the Southeast Asian tropics.

Source: Wikipedia, via iNaturalist

Parts used

Leaves · bothSeeds · internal
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Holy Basil (Tulsi) in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Holy Basil (Tulsi) into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Holy Basil (Tulsi) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
🛁

Herbal Bath

2–3× per week as needed
  • Brew 4–6 tbsp of Holy Basil (Tulsi) in 1 litre of hot water for 15 minutes, strain, and add to a warm bath.
  • Soak for 20–30 minutes.

Pregnancy, Breastfeeding & Children

Pregnancy

Avoid

Holy basil (Tulsi) has documented emmenagogue and abortifacient use in traditional Ayurvedic medicine and is generally advised against in medicinal/supplement doses throughout pregnancy.

Breastfeeding

Use Caution

Limited safety data during breastfeeding; adaptogenic/hormone-modulating activity means it's generally used cautiously and not as a first-choice herb while nursing.

Children

Use Caution

Not typically used in concentrated form for young children; mild culinary use in food is generally considered low risk.

Contraindications

  • Autoimmune conditions (lupus, MS, RA) — may overstimulate immune response
  • CNS medications (benzodiazepines, SSRIs, MAOIs) — may potentiate sedative or serotonergic effects
  • Diabetes medications — may enhance hypoglycaemic effect; monitor blood glucose closely

Warnings

⛔ Diabetes Medications

May enhance the blood sugar–lowering effect of insulin or oral diabetes medications. Monitor blood glucose closely.

⚠️ Sedatives & Antidepressants

May potentiate the effects of sedative, anxiolytic, or antidepressant medications. Use with caution alongside any CNS-active drugs.

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Drug & herb interactions

May have a calming/sedative effect

Watch for: Benzodiazepines, sleep medications, other sedative herbs, and alcohol

Combined CNS-depressant effects can cause excessive drowsiness or impaired coordination.

May affect immune activity

Watch for: Immunosuppressants (for transplant or autoimmune conditions)

Immune-stimulating herbs can work against immunosuppressive therapy.

May affect blood sugar

Watch for: Insulin and oral diabetes medications (metformin, sulfonylureas)

Additive blood-sugar-lowering effects can risk hypoglycemia — monitor glucose closely.

May have a stimulant effect

Watch for: Other caffeine-containing products, MAOIs, and stimulant medications (for ADHD or weight loss)

Additive stimulant effects can raise heart rate and blood pressure.

Where to find in nature

Native region

India, Sri Lanka, Nepal, Bangladesh

Climate

Tropical and subtropical monsoon

Habitat

Forests, riverbanks, cultivated medicinal gardens, and the foothills of the Himalayas

🌿 To see Holy Basil (Tulsi) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

Where to buy

In store

  • Indian grocery and spice shops (e.g. Patel Brothers, India Bazaar)
  • Ayurvedic medicine practitioners and Ayurvedic pharmacies
  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs — certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient — verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Holy Basil (Tulsi), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.