What is Post-e-Bargad?

Post-e-Bargad is the dried bark of the banyan tree (Ficus benghalensis), used as a single drug in Persian and Unani medicine. Healers have given it mainly as a water decoction (a liquid made by simmering the bark) for loose stools, dysentery (diarrhoea with blood or mucus), and as a mouth rinse for sore or bleeding gums.

It is also a folk remedy for high blood sugar, for vaginal discharge, and as a wash for slow-healing wounds. In Unani terms it is classed as cooling, drying and astringent, meaning it tightens tissue.

Here is the honest verdict up front: almost all of the supporting work is laboratory and animal research, and we could not identify good human trials. Long traditional use tells you people have relied on it for centuries; it is not proof that it works, and that point is not repeated in later sections.

How does Post-e-Bargad work?

The most likely explanation is simple chemistry, not a special action. Banyan bark is rich in tannins, plant compounds that bind protein and make tissue contract and weep less. That could plausibly firm up loose stools and calm irritated gums, which matches how the bark has always been used.

For blood sugar, animal studies suggest extracts of the bark may slow how fast sugar is absorbed or nudge insulin (the hormone that moves sugar out of the blood) activity. This has not been confirmed in people, so treat it as an unproven idea rather than a mechanism you can rely on.

Because tannins bind things in the gut, they can also bind medicines and minerals you swallow at the same time. That is a real and predictable effect, and it is the main reason to space the bark away from other tablets.

What forms does Post-e-Bargad come in?

You will most often meet it as one of these:

Dried bark pieces for making a decoction (simmered water extract).

Coarse powder (safoof) taken by the spoonful or stirred into water.

Compound Unani syrups, tablets and churna blends in which banyan bark is one ingredient among several.

A cooled decoction used as a mouth rinse, gargle or external wash.

Where it comes from:

Banyan bark has a long record in South Asian medicine. Unani physicians in Persia and India adopted it as Post-e-Bargad, and Ayurvedic texts describe the same tree as Nyagrodha with overlapping uses for diarrhoea, discharge and wounds.

It remains a common shop item in Unani and Ayurvedic dispensaries across India and Pakistan today.

What does Post-e-Bargad help with?

• Ordinary short-term diarrhoea: This is the oldest and most consistent use across Unani and Ayurvedic texts. The tannins in the bark tighten the gut lining, which can plausibly reduce watery stools. We found no controlled human trials testing banyan bark for diarrhoea, so this rests on tradition and chemistry, not proof.
• Dysentery (diarrhoea with blood or mucus): Classical Unani practice used the decoction here, often with other astringent drugs. Blood or mucus in the stool needs a diagnosis, because it can mean infection or bowel disease. Use a doctor first, not the bark first.
• Sore or bleeding gums and mouth ulcers: A cooled decoction is used as a rinse and spat out. Astringent rinses do make gums feel tighter and less tender in the short term. Human evidence for this specific bark is missing, and bleeding gums that keep coming back need a dentist.
• Type 2 diabetes (traditional use only): Animal studies report lower blood sugar with bark extracts. That has not been reproduced in well-conducted human trials that we can identify, so it should not replace prescribed diabetes medicine. If you take it anyway, monitor your sugar closely, because the combination could push it too low.
• Leucorrhoea (white vaginal discharge): Unani texts list the bark for this, taken by mouth and sometimes as a wash. There is no human trial evidence. Persistent discharge, especially with odour, itching or pain, needs testing for infection.
• Minor wounds and skin sores (used externally): Traditional practice applies the decoction as a wash or the powder as a dusting. Laboratory work shows some activity against bacteria in a dish, which does not reliably predict what happens on skin. Deep, dirty or spreading wounds need medical care.

Which foods are rich in Post-e-Bargad?

1. Banyan bark decoction: the bark is a remedy, not a food, and this is the usual way it is taken
2. Common figs (Ficus carica): a food relative of the same plant family, but they do not contain the bark's constituents

Practical Tips:

You cannot get this from the diet; tea and other tannin-rich drinks share the iron-binding effect but are not substitutes.

What are the side effects of Post-e-Bargad?

• Constipation, if used for more than a few days
• Nausea or stomach discomfort
• A dry, puckering feeling in the mouth
• Reduced absorption of iron from food and supplements
• Loss of appetite with prolonged use
• Skin rash or itching in people allergic to fig-family plants
• Blood sugar dropping lower than expected in people on diabetes medicine

Good to know:

Most reported problems are mild and stop when you stop the bark. They come from the tannins, which are drying and can bind iron and other nutrients in the gut. The real risks to watch are low blood sugar in people already on diabetes treatment, and using the bark to delay proper care for bloody diarrhoea or a wound that is getting worse.

How much Post-e-Bargad should you take?

• Recommended daily: No dose has been established by research, so what follows is traditional practice, not a tested recommendation. Decoction: about 3 to 6 grams of dried bark simmered in a cup of water, once or twice a day. Powder: about 1 to 3 grams a day, in divided amounts. Mouth rinse or skin wash: cooled decoction, used and then spat out or discarded. For compound products, follow the label and the practitioner who supplied it. Start at the low end.
• Best time of day: Split the amount between morning and evening. If you take other medicines, keep the bark at least two hours away from them.
• With or without food: Take it with or just after food. The tannins can feel harsh on an empty stomach and may cause nausea.
• Time to effect: For loose stools, tradition expects some firming within a day or two. For anything else, no reliable timeframe exists.
• How long to take it: Short courses only. For diarrhoea, stop within 2 to 3 days; if the diarrhoea has not settled by then, get checked. For any other use, reassess after two weeks and do not run long open-ended courses, because long-term safety in people has not been studied.