Respiratory: Asthma, whooping cough (pertussis), respiratory illnesses - runny nose, bronchitis, coughs, nasal/sinus congestion, cold and flu, swimmers' ear, earache

Cardiovascular: Enhances cardiac function; works against heart disease; atherosclerosis

Gastrointestinal: Indigestion, abdominal distension, stomach disorders, oral ulcers, stimulates the liver and spleen, chronic active hepatitis, gas (flatulence). Stimulates the digestive process

Genitourinary: Bladder and kidney health, possibly UTI

Musculoskeletal: Anti-inflammatory, arthritis and fibromyalgia; may increase strength, decrease pain, and swelling.

Skin: Insect bites, warts, ringworm, acne, hair growth, dandruff

Glucose: May reduce blood sugar

Cholesterol: May help reduce cholesterol

Thyroid: May help regulate hyperthyroidism

Immunity: Enhances immunity

Neurologic: May enhance brain function, cognition, and short-term memory

Mental Health: Stress, migraines, nervous conditions, insomnia, anxiety, stress

Infectious Disease: Malaria, AIDS, hepatitis, Tuberculosis

Other: Decreases platelet aggregation (blood thinning), insect repellants, mercury poisoning

longevity, snake and scorpion bites, longevity

                                                   *   *   *

SIDE EFFECTS: Stomach upset/nausea/diarrhea, increased bleeding, decreased fertility, decreased blood sugar, tooth discoloration, may worsen hypothyroidism

CAUTION/CONTRAINDICATIONS: Regular use of Tylenol and basil, use with antidiabetic medications (may lower blood sugar too much), hypothyroidism, phenobarbital, blood thinners

FORMS: Elixer, extract, capsule, tea (tulsi tea), oils, mouthwash

Recommended Brands

Many third‑party tested brands do not have the minimum amounts of active ingredients declared on the label. The following tested brands are recommended:

• Himalaya® Holy Basil extract capsules (order through the Fullscript link here)

I only recommend herbal and supplement brands that meet high standards for safety, effectiveness, and transparency. I research each product before sharing. Some linkscarry some decent products—like Fullscript, Nature Made and Life Extension—are affiliate links, meaning I may earn a small commission if you buy through them, at no extra cost to you. It helps support this free site. Many products also offer discounts, fast shipping, and helpful reviews.

Dosage

As directed on the product label.

Some clinical and consumer sources describe a wide range of herbal amounts, and many are not supported by strong evidence. Always follow the manufacturer’s instructions.

Traditional herbal practices describe the use of holy basil (tulsi) in capsule, tea, or extract form. Modern commercial products vary widely in strength and formulation, so traditional amounts may not apply to current products. Many people use holy basil for stress support, mood balance, or general wellness, but evidence varies and product strengths differ significantly.

Some consumer health sites describe various regimens used in research studies. These reflect study protocols rather than standardized clinical recommendations.

For detailed drug dosing and interaction information, refer to herbal dosing on the Epocrates website.

Traditional Use (General Information Only)

Holy basil (tulsi) has been used traditionally for stress relief, immune support, and general wellness. Traditional practices describe the use of leaves in teas, tinctures, powders, and later standardized extracts. These uses are based on historical and consumer experience rather than strong clinical evidence.

These reflect traditional and consumer uses, not evidence‑based medical treatments. Product formulations vary, so it is important to follow the manufacturer’s directions.

*Disclaimer: The material above is for informational purposes only. This information is not intended to diagnose or treat a condition. The uses listed above are tentative; some have or are undergoing research trials, but many are not FDA-approved. It is essential that you investigate these supplements further before deciding to use them. Check interactions and contraindications on sites like Drugs.com, German Commission e or WebMD. Do not attempt to treat a serious condition like liver, kidney problems, high blood pressure, heart, cancer, diabetes, or thyroid issues without discussing it with a healthcare provider first. If you are pregnant, do not use supplements without discussing it with your healthcare provider.