Hummaz
Quick Facts
- What it is: Hummaz is the sour leaf of Rumex vesicarius (bladder dock), a single plant drug used in Persian and Unani medicine as a cooling food-medicine.
- Main uses: Poor appetite, Feverish nausea and thirst, Mild constipation, Sluggish digestion
- Best for: Appetite and digestion, traditionally, Use as a sour leafy vegetable
- Active ingredients: Oxalic acid and oxalates, Vitamin C, Vitamin K, Flavonoids and polyphenols, Anthraquinones
- Forms: Fresh leaves, Cooked greens, Leaf infusion or decoction, Fresh leaf juice, Dried leaf powder
- Time to effect: Same day if at all; digestive effects only.
- Side effects: Usually mild stomach upset or loose stools; the real concern is oxalate and kidney stones.
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What is Hummaz?
Hummaz is the Persian and Unani name for the sour leaves and soft stems of Rumex vesicarius. This desert plant belongs to the dock family. It is also called bladder dock or bladder sorrel.
It is a single drug. That means one plant used on its own, not a mixture of several.
In classical Unani practice it is used as a cooling, sour food-medicine. Healers gave it for loss of appetite, nausea, thirst, slow digestion and mild constipation. People eat it as a leaf vegetable as often as they take it as a medicine.
Here is the honest evidence position. The traditional record is long and steady. But there is almost no modern human trial evidence.
Long traditional use is not proof that something works. That point applies to everything on this page. Nothing here should be read as a cure or a promised result.
One practical point matters more than any claimed benefit. Like spinach, rhubarb and other sorrels, Hummaz is high in oxalates. These are natural acids that can bind calcium and form kidney stones.
That is why this page is rated caution rather than routine.
How does Hummaz work?
No one has confirmed how Hummaz works in people. So everything below is a fair idea, not a proven fact.
The sour taste comes from oxalic acid and related plant acids. Sour, sharp plants are thought to bring on saliva and stomach juices. That may explain the old use for poor appetite and nausea.
Dock plants of the Rumex group also hold anthraquinones. These are plant compounds that can loosen the bowel by pulling water into the gut.
Lab work has found antioxidant activity in leaf extracts. That means the extract mops up reactive molecules in a test tube. Such test-tube results do not reliably predict anything useful in a living person.
What forms does Hummaz come in?
Hummaz is most often used in the simplest forms.
Fresh leaves are eaten raw in salads or cooked like spinach. Some people make a water infusion or a decoction of the dried leaf.
Fresh leaf juice is used in some Unani preparations. Dried powdered leaf is sometimes folded into compound Unani formulas.
Standardised capsules and extracts are not common. There is no agreed strength standard for them.
Where it comes from:
Hummaz has a long, settled place in Persian and Unani writing on cooling, sour foods. Doctors in the Arabic-Persian tradition called it cold and dry. They gave it for conditions they saw as hot, such as fevers, thirst and bilious nausea (sickness linked to bile).
It spread across Egypt, the Arabian Peninsula, Iran, Iraq and northern India. People gathered it wild as a vegetable and kept it as a home remedy. Local names for it survive in all of these regions.
It is still a staple single drug in Unani practice today. Its standing rests on that long, recorded use rather than on clinical testing.
Who should avoid Hummaz?
- Do not use Hummaz if you have ever had a kidney stone, because the leaves are high in oxalates (natural acids that can form stones)
- Do not use Hummaz if you have kidney disease or reduced kidney function
- Do not use Hummaz medicinally if you are pregnant or breastfeeding, as its safety has not been tested
- Do not eat large or repeated amounts if you take warfarin or another blood thinner, because the vitamin K in the leaves works against the medicine
- Do not use Hummaz if you take lithium (a mood-stabilising medicine) without asking your prescriber first
- Do not use Hummaz as a regular laxative if you take digoxin (a heart medicine), because loose stools can lower your potassium and upset the heart rhythm
- Do not give concentrated Hummaz juice or medicinal doses to children
- Never eat large quantities of the leaves or juice at once; heavy sorrel intake has caused serious oxalate poisoning in rare reports
- Do not use Hummaz if you have gout or are on a low-oxalate diet your doctor has set
When should you see a doctor?
See a doctor promptly if you get sharp pain in your side or back, blood in your urine, or you are passing much less urine than usual, as these can be signs of a kidney stone or kidney injury. Get medical help the same day for vomiting that will not stop, severe stomach pain, or diarrhoea that lasts more than two days. Call emergency services if someone has swallowed a large amount of the leaves or juice and becomes confused, weak, short of breath or develops a fast or irregular heartbeat. Also speak to your doctor before using Hummaz regularly if you take a blood thinner, a water tablet, lithium or digoxin.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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