Educational information, not medical advice — ask your doctor or midwife.
John Charles is a wild plant in the mint family. Its botanical name is Hyptis verticillata. In Jamaica it is often called John Charles weed, or liver and blood bush.
Bush doctors boiled the leaves and stems into a tea or a skin wash. It was used as a "cleansing" herb for the liver and the blood. It was also used for colds, pain, worms and sores.
Here is the honest verdict. There are no published human trials of this plant. Almost all the research sits in test tubes and animals, so long traditional use is not proof that it works, and not proof that it is safe.
One point matters before you read further. The plant holds lignans that are close relatives of podophyllotoxin, a known cell poison. That is why this page gives no dose and no recipe.
No one has shown how John Charles acts in the human body. The ideas below come from lab dishes and animals.
The plant is rich in lignans, a group of plant chemicals. In cell studies, podophyllotoxin-type lignans stop cells from dividing. That is why lab teams have tested extracts against cancer cells in dishes.
This is a laboratory finding, not a treatment. Stopping cell division harms healthy cells too. It is a reason for caution, not a reason to drink the tea.
In test tubes, extracts slow the growth of some bacteria and fungi. Animal work points to a mild anti-swelling (anti-inflammatory) effect. Whether a cup of bush tea does either of these in a person is unknown.
The plant has a strong smell from its essential oil. In lab tests this oil kills insects and mites. That fits the old use as a wash for lice, ticks and skin sores.
The old "blood cleansing" idea has no modern backing. Your liver and kidneys already clear waste. No study shows that this herb helps them do it.
John Charles is not a mainstream supplement. In the Caribbean it is mostly a fresh home remedy, picked and used the same day.
Forms you may come across:
- Fresh leaves and stems, boiled into a tea.
- Dried loose herb from a market stall.
- A strong brew used as a "bush bath" or skin wash.
- Crushed leaves laid on the skin as a poultice.
- Tinctures or capsules from small herbal sellers. These are rare, and few carry real testing.
Strength is not controlled in any of these forms. A tea made from a handful of leaves is not a measured dose. Imported dried herb may also be mislabelled or mixed with other bush.
The essential oil is sometimes sold for use on skin or for insects. It should never be swallowed.
John Charles has a long and well-recorded place in Jamaican bush medicine. It also appears in folk use across Belize, Mexico and parts of Central America.
Healers grouped it with the "cleansing" bushes. The tea was taken for liver trouble, for "bad blood", and after illness. The nickname liver and blood bush comes straight from that idea.
Other recorded uses were for colds, fever, stomach pain and worms. Crushed leaves were pressed on sores, bites and aching joints. Some healers used it for a late period, which is one reason it was kept away from pregnant women.
This section records what people did. It is not a how-to, and it is not a recommendation.
Stop using it and see a doctor if you get:
- Yellow skin or eyes, or dark urine.
- Vomiting or diarrhoea that will not settle.
- Numbness, tingling or weakness in your hands or feet.
- Easy bruising, nosebleeds or bleeding gums.
- A spreading rash or swelling of the face or throat.
Go to an emergency department if a child swallows any, or if someone swallows the essential oil. Take the plant or bottle with you.
John Charles is not an approved medicine in the UK, EU or US. It has no novel food clearance in the UK or EU, so it cannot be sold there as a food. In Jamaica and parts of Central America it is a common bush medicine, gathered and sold without medical approval.
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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