Educational information, not medical advice — ask your doctor or midwife.
Fat hen is a wild green that people eat as a cooked vegetable. Its botanical name is Chenopodium album. German speakers call it Weißer Gänsefuß.
It grows as a weed on farmland, waste ground and in gardens across Europe. It belongs to the same plant family as spinach, beets and quinoa. The young leaves taste much like spinach.
The tiny black seeds were once ground into meal in hungry years. Country healers also used the leaves as a mild home remedy. Long use in a tradition is not proof that something works, and it is not proof that it is safe.
Here is the short verdict. As food, fat hen is a normal leafy green with useful nutrients. As a medicine, human evidence is almost absent.
One point shapes the whole page. Fat hen is high in oxalate, a natural acid that can feed kidney stones. It can also take up a lot of nitrate from rich or manured soil.
That is why this page treats it as a food to handle with care, not as a treatment.
Most of what fat hen offers is food value, not drug action.
The cooked leaves carry vitamin C, beta-carotene (which your body turns into vitamin A), folate, iron and calcium. These nutrients act the same way they do in any green vegetable. Some of the calcium and iron is bound by oxalate, so you absorb less of it.
Lab work has looked at leaf and seed extracts. In test tubes they mop up free radicals, which are unstable molecules that can damage cells. In test tubes they also slow the growth of some bacteria and fungi.
Whether any of that happens in a person who eats the greens is not known.
In rats, leaf extracts have lowered blood sugar and eased signs of liver injury. Animal results often fail to repeat in people. No human trial has tested these effects.
Folk tradition treated the plant as a mild laxative and a cooling poultice for skin. The fibre and water in any cooked green can soften stools. No study has tested fat hen itself for that use.
In practice, fat hen is used as food far more than as a remedy.
- Fresh young leaves and shoots, picked in spring and early summer.
- Cooked greens. Boiling or steaming, then pouring off the water, is the usual method and it lowers oxalate and nitrate.
- Dried leaf, sold in small bags for a folk tea.
- Seeds and seed flour, soaked and rinsed first to wash out bitter saponins.
- A mashed leaf poultice, laid on skin in old country practice.
- Capsules or extract powders, which turn up occasionally online.
There is no agreed standard for the supplement forms. Strength is not measured and labels vary. Wild-picked greens also vary with soil and season.
Source matters more than form here. Plants from roadsides, sprayed field edges or dog-walking routes can carry weedkiller, exhaust residue or animal waste.
Fat hen is one of the oldest known food plants of northern Europe. Seeds have been found in Iron Age bog bodies, including the stomach of Tollund Man. Archaeologists find its seeds across prehistoric European sites.
Roman and medieval households used it as a pot-herb before spinach became common. It was gathered free from field edges and fed to people and to poultry, which is one story behind the English name.
In later centuries it served as a famine food. Families in Europe and South Asia fell back on the leaves and seed meal when grain was short. In parts of India the same plant is still eaten as bathua.
Folk healers in Europe recorded other uses. The leaves were mashed into poultices for sores, burns and insect bites. Teas were given for sluggish bowels and to make people pass more urine.
These records describe what people did. They were not tests, and this page does not present them as reasons to self-treat.
Stop eating it and see a doctor if you get pain in your side or back, pain passing urine, or blood in your urine. These can be signs of a kidney stone.
See a doctor too if stomach pain or vomiting keeps up after you stop, or if a skin rash spreads or will not settle.
Call emergency services for swelling of the lips, face or throat, a widespread rash, or trouble breathing. Also treat grey or blue lips in a baby as an emergency.
In the UK, the EU and the US, fat hen is an ordinary wild food plant. It is not approved as a medicine anywhere, and no health claim for it is authorised. Dried leaf and capsules sold as supplements are not checked for strength or purity the way medicines are.
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.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
