Anixety. Early research found that taking 500 mg of holy basil leaf extract twice daily after meals for 60 days reduced anxiety and associated stress and depression in people with anxiety.
Diabetes. Some early research suggests that a holy basil leaf extract might decrease blood sugar in people with type 2 diabetes.
Stress. In early research, taking 400 mg of a holy basil extract (M/s Natural Remedies Pvt. Ltd, India) by mouth in the morning and 800 mg at night for 6 weeks decreased symptoms of stress, including forgetfulness, sexual problems, exhaustion, and sleep problems.
Common cold.
Influenza ("the flu").
Asthma.
Bronchitis.
Earache.
Headache.
Stomach upset.
Heart disease.
Fever.
Insomnia.
Viral hepatitis.
Malaria.
Tuberculosis.
Mercury poisoning.
Ringworm.
An antidote to snake and scorpion bites.
Other conditions.
More evidence is needed to rate the effectiveness of holy basil for these uses.