Educational information, not medical advice — ask your doctor or midwife.
Bazilik is a strongly scented leafy herb. People in the Caribbean drink it as a tea and cook with it. The plant is Ocimum gratissimum, a close cousin of sweet basil.
In Jamaica it is called fever basil. In Cuba and the Dominican Republic it is one of the herbs called albahaca. The leaves smell of cloves, because of the oil they hold.
Yard medicine used the tea for colds, fever, gas and cramps. The leaf is also used in steam baths and washes.
Here is the honest verdict. Human trials are few, small and weak, so these uses are not proven. Long use in a tradition is not proof of effect, and it is not proof of safety.
Almost all of what is known comes from the lab, not from people.
In test tube studies, the leaf oil slows the growth of several bacteria and fungi. Two oil compounds, eugenol and thymol, seem to do most of that work. Whether a cup of tea does the same inside your body is not established.
In animal studies, leaf extracts have lowered blood sugar and eased pain and fever. The doses given to animals are often far larger than a tea provides. Results like these do not show that the herb helps people.
In cell studies, eugenol appears to calm some signals linked to swelling and pain. This is a laboratory finding only. No good human trial has tested it for pain.
The warm steam and strong smell may ease a blocked nose for a short time. That is a simple effect of hot vapour. It is not a special power of this plant.
You will meet bazilik in these forms:
Fresh leaves, used in cooking and in home teas.
Dried loose leaf or tea bags.
Bush baths and steam inhalations made from the leaf.
Tinctures, which are alcohol extracts.
Capsules of dried leaf powder, which are less common.
Essential oil, which is very concentrated and is not a tea.
The essential oil is a different thing from the herb. It is sold for scent and for diluted skin use. It is not for swallowing.
Bazilik has deep roots in Caribbean bush medicine. The plant came from Africa and Asia and spread through the islands.
It grew in yard gardens and was passed down by household healers. Jamaican use gave it the name fever basil, because the tea was given during fevers and colds. In Cuba and the Dominican Republic it was also used in cleansing baths and spiritual practice.
Similar uses were recorded in West Africa, Brazil and India. Healers used it for stomach upset, cramps, coughs and skin sores. These are records of custom, not records of tested effect.
Stop and see a doctor if you get a rash, swelling, itching or trouble breathing.
Get care within a day if your fever lasts more than three days, or if it goes above 39C (102F). The same applies to a cough with breathlessness or chest pain.
Go to an emergency department at once if anyone swallows the essential oil. Warning signs include vomiting, confusion, fits, or yellow skin or eyes.
In the United States, bazilik leaf is an ordinary food herb and may be sold as a dietary supplement. It is not approved as a drug for any illness.
In the UK and EU it is sold as a food and as a herbal product. The essential oil is sold for scent and cosmetic use, not for swallowing.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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