Educational information, not medical advice — ask your doctor or midwife.
Avocado leaf is the leaf of the avocado tree, Persea americana. Caribbean home healers brew it as a tea. It is called zaboka in Haiti and pear leaf in Jamaica.
It has been taken for coughs and colds, upset stomach, period pain, high blood pressure and diabetes. Dried Mexican avocado leaves are also a kitchen herb, used to flavour beans and meat.
The leaves hold persin, a compound that poisons horses, goats, rabbits and birds. Human evidence for any health benefit is almost absent. Long traditional use is not proof that it works, and not proof that it is safe.
No one has shown how avocado leaf works in people. Everything below comes from lab or animal work.
In rats, leaf extracts have lowered blood sugar after a meal. In test tubes, the leaf slows enzymes that break starch down into sugar. Whether a cup of tea does this in a person is not known.
In rats, extracts have also lowered blood pressure and raised urine flow. One idea is that flavonoids in the leaf help relax blood vessels. That idea has not been tested properly in humans.
In test tubes the leaf slows the growth of some bacteria and fungi. It also soaks up free radicals, which are unstable particles that can harm cells. Lab results like these often do not show up in the living body.
Persin, the leaf's own toxin, harms heart and udder tissue in animals. That is a safety signal, not a benefit.
Most people use the dried or fresh leaf as a tea. Loose leaf and teabags turn up in Caribbean and Latin American markets.
Other forms sold include capsules of leaf powder, liquid tinctures and strong extracts. These pack more leaf into one dose than a cup of tea does.
Whole dried Mexican avocado leaves are also sold as a cooking herb. In that use they are toasted and added to a pot, then often lifted out.
Leaf essential oil exists as well. It is a concentrated product and is not a drink.
No form is standardised. Two bags of the same leaf can differ a lot in strength.
Avocado leaf tea has a long record in Caribbean home care. It was used in Haiti, Jamaica, Cuba, the Dominican Republic and across Latin America.
Healers brewed it for colds, coughs, gas, stomach pain and sluggish bowels. It was also given as a 'washout' tea to bring on urine, and at times to bring on a late period.
Spanish colonial records and later folk guides list the leaf among common yard remedies. The avocado tree grows in most yards, so the leaf cost nothing.
In Mexico the leaf moved into the kitchen as a seasoning for beans, tamales and stews. That culinary use is separate from the medicinal brews.
This record shows what people did. It does not show that the leaf helped them.
Stop and get medical help the same day if you get a rash, swelling of the lips, face or throat, or wheezing.
Get urgent help for chest pain, a racing or uneven heartbeat, or trouble breathing.
See a doctor if you feel shaky, sweaty or confused, which can mean low blood sugar. Also see a doctor for yellow skin or eyes, dark urine, or pain under the right ribs.
If a pet or farm animal has eaten the leaves, call a vet at once.
In the United States, the United Kingdom, Canada and the EU, avocado leaf is not a licensed medicine. It is sold as a herbal tea or food seasoning, and no health claim on the pack has been checked by a regulator.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Avocado leaf is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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