What is Roghan Chalmogra?

Roghan Chalmogra is an oil pressed from the seeds of Hydnocarpus laurifolia. In English it is called chaulmoogra oil. It is a single drug of the Persian/Unani tradition.

It is used mainly on the skin for long-standing skin complaints. In the past it was also used for leprosy (a germ infection of the skin and nerves).

Today it is used mostly as a skin oil. You rub it into scaly, thickened or discoloured patches. Unani practice calls it a warming, drying oil for cold, damp skin problems.

The evidence verdict is simple. Tradition backs it strongly, and that tradition is old. But modern human trials are all but absent.

Long use is not proof that something works. Proven medicines took over from chaulmoogra for leprosy in the 1940s. Nothing since has shown it to match them.

How does Roghan Chalmogra work?

The seed oil is rich in unusual fatty acids. In lab dishes, these acids slow the growth of mycobacteria. That is the germ family behind leprosy and tuberculosis.

On the skin, the oil also acts as a heavy emollient (a moisturiser that softens and seals the surface). Some of the reported softening of scaly patches may be nothing more than that.

Modern controlled studies in people have not confirmed any of this. So treat the idea as plausible, not as settled fact.

What forms does Roghan Chalmogra come in?

The common form is the plain pressed seed oil. It is a thick yellow-brown fat that turns solid when cool. It is sold as a bottled oil for use on the skin.

It is also blended into Unani ointments, balms and medicated oils. Some blends add neem, turmeric or karanja. Soaps and creams with small amounts are sold in South Asia.

Hospitals used injected ethyl ester products in the early twentieth century. They are obsolete, and they often caused bad reactions. Do not seek them out.

Where it comes from:

Chaulmoogra has been used for hundreds of years in South Asia and East Asia. It was used for leprosy and stubborn skin disease.

Unani texts list it as Roghan Chalmogra. Ayurvedic texts call it tuvaraka taila. Chinese texts call it da feng zi.

Western medicine took it up around 1900. Leprosy hospitals used it widely for decades. Sulfone drugs such as dapsone replaced it in the 1940s.

What does Roghan Chalmogra help with?

• Leprosy (historical use only): This is the use the oil is famous for, and it is now obsolete. Leprosy is cured by a free, proven combination of antibiotics from the World Health Organization. Never use this oil in place of that treatment.
• Psoriasis-type scaly patches: Traditional use is long-standing, and the oil does soften and moisturise thick scale. There are no controlled human trials showing it changes the disease itself.
• Chronic eczema and dry, thickened skin: Used in Unani practice as a warming oil for dry, cracked skin. Any benefit seen may simply be the moisturising effect of a heavy oil. Evidence is traditional, not clinical.
• Ringworm and other fungal skin patches: Laboratory work suggests the oil slows some fungi and bacteria. No human trials have tested it against modern antifungal creams, which are cheap and reliable.
• Vitiligo (loss of skin colour): Classical texts mention chaulmoogra for patchy skin, and it still appears in some Unani formulas. Human evidence for repigmentation is absent, and modern treatments exist.
• Joint and muscle aches, as a rubbing oil: Used as a warming massage oil in Unani practice. Massage itself eases aching muscles, so the oil's own contribution is unclear. No trial evidence supports it.

Which foods are rich in Roghan Chalmogra?

This is a medicinal seed oil, not a food. It is not eaten and is not present in the diet.

What are the side effects of Roghan Chalmogra?

• Stinging, burning or redness where it is applied
• Itching or a rash from allergy to the oil
• Blocked pores or spots on oily skin
• Strong, lingering smell and staining of clothes and bedding
• Nausea, vomiting and stomach pain if swallowed
• Fever and kidney irritation reported with the old injected forms

Good to know:

Used sparingly on small patches of unbroken skin, the oil is usually tolerated, and irritation is the common complaint. The serious effects on the list came from swallowed or injected use in the early twentieth century, not from rubbing it on. Stop at the first sign of a rash or burning.

How much Roghan Chalmogra should you take?

• Recommended daily: No safe or effective dose has been established in modern research, for skin or by mouth. Traditional topical use is a thin film of oil rubbed into the affected patch once or twice a day. Test a small area first and stop if the skin stings or reddens. Do not take it by mouth. Historic oral and injected doses caused vomiting, fever and kidney irritation, and are not used today.
• Best time of day: After a bath or shower, when the skin is still slightly damp, so the oil holds moisture in. An evening application suits most people, as the oil is heavy and stains clothes.
• With or without food: Not relevant. This is an oil for external use, and it should not be swallowed.
• Time to effect: Softening of dry, scaly skin may be noticeable within days, as with any thick moisturiser. Any deeper change, if it comes at all, would take weeks, and is not backed by trial evidence.
• How long to take it: Give a topical trial about two to four weeks, then judge whether the skin looks or feels any better. Stop if there is no change. Do not use it long-term on large areas of skin without a doctor's guidance. If a patch is spreading, numb, or not healing, get it looked at rather than continuing the oil.