Educational information, not medical advice — ask your doctor or midwife.
What is love-in-a-mist?
Love-in-a-mist is a climbing vine, Passiflora foetida. It grows wild across the Caribbean and the tropics. The ripe fruit is eaten, and the leaves are brewed as a bush tea.
One safety point comes first. The unripe fruit and the leaves hold compounds that can release cyanide. Only the fully ripe fruit is treated as food.
The plant is called marie-goujat in Haiti. In Jamaica and the Eastern Caribbean it is bush granadilla or wild passion flower. The crushed leaves give off a strong smell, which is where the name foetida comes from.
Traditional use is long-standing. That standing is not proof that the plant works, and it is not proof that it is safe.
Here is the honest verdict on the evidence. Almost nothing has been tested in people. Most of what is claimed comes from test tubes and animal work.
How is it supposed to work?
No one has shown how this plant acts in the human body. The proposed ways it might work all come from the laboratory.
In animal studies, leaf extracts have shown calming and sleep-promoting effects. Some animal work also points to dulled pain signals and lower fever. Whether any of this happens in people is not established.
In test-tube studies, extracts slow the growth of some bacteria and fungi. That does not tell you what happens in a human gut or on human skin.
In cell studies, the flavonoids in the leaf mop up reactive molecules. This is often called antioxidant action. Such results rarely carry over into real health benefits in people.
The cyanide-releasing compounds in the leaf and unripe fruit are not a benefit. They are the plant's own defence chemistry, and they are the main safety concern here.
What forms does it come in?
Most use is home-made rather than shop-bought.
- Fresh ripe fruit, eaten as a small snack.
- Leaf tea, made by steeping fresh or dried leaves.
- Crushed leaf poultice, laid on skin sores or itchy patches.
- Dried leaf sold loose in some Caribbean markets.
- Occasional powdered leaf capsules sold online.
There is no standard product. Strength is not tested or printed on labels in the way a medicine label would carry it. Two batches of the same tea can differ widely.
Shop-bought "passion flower" supplements usually contain a different species, Passiflora incarnata. Check the Latin name before you assume the two are the same.
Where does its use come from?
The plant has been used in Caribbean home medicine for generations. Records of that use appear in folk and ethnobotanical writing from the 1800s onward.
In Haiti, marie-goujat was brewed as a calming night-time tea. In Jamaica and the Eastern Caribbean, bush granadilla leaves were boiled for coughs, colds and fevers.
Crushed leaves were laid on sores, boils and itchy skin. Ripe fruit was eaten by children as a wild snack.
Similar uses were recorded in India, West Africa and parts of Latin America, where the vine also spread. The plant travelled easily, and the uses travelled with it.
These accounts describe what people did. They were not trials, and they do not tell you whether the plant helped.
When to see a doctor
Get emergency help now if you or anyone else has any of these after taking the plant or eating its fruit:
- Headache with confusion or drowsiness you cannot shake off - Fast or gasping breathing - Vomiting with dizziness or weakness - A racing heart, or skin that looks flushed or blue - Fainting, fits or collapse
Tell the staff exactly what was eaten or drunk, and take a sample of the plant if you can.
Stop using it and book a normal appointment if you get a rash, lasting stomach upset, or daytime drowsiness.
See a doctor rather than treating yourself if a fever lasts more than two days, a cough lasts more than three weeks, or a skin sore spreads, weeps or smells.
Is it legal?
The plant is not approved as a medicine in the United States, the United Kingdom, the European Union, Canada or Australia.
The ripe fruit is an ordinary food in the Caribbean and the tropics. Dried leaf is sold as a herbal tea in some markets.
No regulator has reviewed it for safety or effect. Supplement labels are not checked for strength or purity in most of these countries.
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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