Karanja Oil for Psoriasis-Prone Skin: What to Know

Karanja oil, pressed from the seeds of the Indian beech tree (Pongamia pinnata), has a long history in Ayurveda and folk medicine as an oil for skin complaints. For psoriasis-prone skin, it can work as a rich, oily layer that may help soothe dryness and roughness. However, the scientific evidence so far comes from lab and mouse studies, not human trials, so it is best used alongside your doctor's treatment and not instead of it.

If you are new to herbal options, our evidence-graded review of natural psoriasis treatments explains how we rate each one. This guide looks closely at karanja: what it is, what the research does and does not show, and how to use it safely.

What is karanja oil?

The karanj tree (also called pongam, karanga or Indian beech) grows along roadsides, riverbanks and village boundaries in most of India. Its seeds contain roughly 27–39% oil, and nearly half of that oil is oleic acid, the same fatty acid that dominates olive oil [3]. That fatty profile is why karanja feels thick and nourishing on the skin.

The oil is yellow to brown, with a strong, bitter smell that many people notice straight away. The smell and taste come from a group of flavonoid compounds, the best known being karanjin and pongamol [3][4]. These same compounds are the reason researchers are interested in karanja for skin inflammation.

Karanja in Ayurveda

In Ayurveda, karanja is traditionally used for skin conditions grouped under kushtha, often alongside bitter herbs such as neem. Karanja oil is used on its own as karanja taila or blended into classical medicated oils. Older literature also lists the seeds for scabies, ulcers and other skin complaints [4]. This is a record of traditional use, which is valuable but is not the same as proof from clinical trials.

Karanja is often compared with neem, another bitter oil with a long history in Indian homes. You can read about that one in our guide to neem for psoriasis.

What does the research actually show?

Here is a plain summary of the studies we could find and open. The overall picture: early and interesting, but far from settled.

Lab studies on karanjin

A 2018 short report in 3 Biotech tested karanjin and pongapin, two compounds from karanja, in a chemical test for nitric oxide scavenging (nitric oxide is one of many signals involved in inflammation). Karanjin scavenged a high proportion of nitric oxide in the test. The researchers also used computer modelling to see how these compounds might bind to proteins in the IL-17 and IL-23 pathways, which are central to psoriasis [1]. This is useful early work, but a test tube and a computer model are a long way from human skin.

A mouse study

A small 2017 study in the Journal of Drug Delivery and Therapeutics applied karanjin oil daily for a week to mice with psoriasis-like skin changes caused by imiquimod cream. The treated mice had lower blood levels of inflammatory markers such as TNF-alpha and IL-1 beta than the untreated group [2]. However, there were only six mice per group, the paper is two pages long, and it does not report statistical testing. Results in mice often do not carry over to people.

What is missing

We could not find a well-designed, peer-reviewed human trial of karanja oil for psoriasis. Nobody can honestly say how well it works for people or who it suits best, so be wary of anyone promising results in a fixed number of weeks.

Type of evidence	What exists for karanja	What it tells us
Traditional use	Long use in Ayurveda and folk medicine for skin complaints	Generations have found it useful; not tested proof
Lab and computer studies	Karanjin and pongapin in chemical and modelling tests [1]	A possible biological reason it might calm inflammation
Animal studies	One small mouse study [2]	Encouraging signal, low certainty
Human trials	None of good quality found	Real-world benefit for psoriasis is unknown

How karanja oil may help psoriasis-prone skin

Even without trial data, there is a practical reason oils like karanja can feel helpful. Psoriasis plaques lose water quickly and become dry, tight and scaly. Moisturisers and emollients form a layer that slows this water loss, and doctors consider them a basic part of psoriasis care [5][6]. A thick oil like karanja can play this role and may help soften scales and ease the dry, itchy feeling.

Cleveland Clinic advises applying moisturiser while the skin is still slightly damp after a bath, because it absorbs better [5]. In Indian homes, a short oil massage before or after bathing is a familiar habit that fits this well. For more on routines, see our guide on how to moisturise psoriasis-prone skin correctly.

Karanja in blended oils

Pure karanja smells strong and feels heavy, so it is usually blended. Our Xpsoria Psoriasis Oil, for example, combines karanja with sesame, babchi, black cumin, chaulmoogra and tamanu oils, pippali oil infused with herbs such as neem and kalmegh, and essential oils including thyme and neem. Blends like this are traditionally used to support dry, flaky skin; they are not a substitute for medical treatment.

How to use karanja oil safely

1. Patch test first. Apply a small amount to the inner forearm once a day for a few days and watch for redness, burning, itching or swelling. Cleveland Clinic suggests trying new products on a small area first [5].
2. Use a little on damp skin. After a lukewarm bath, pat dry and apply a thin layer to rough, dry areas.
3. Avoid broken or bleeding skin. Do not apply oils to open cracks, raw patches or infected areas.
4. Keep it off the face and eyes unless your doctor agrees. Facial skin is more sensitive.
5. Protect clothes and bedding. Oils can stain. The NHS also warns that fabric soaked in emollients burns more easily, so keep away from open flames, diyas and gas stoves after applying [6].
6. Keep using your prescribed treatment. Oils can sit alongside creams or tablets your dermatologist has given you. Ask your doctor about the order and timing.

Important safety notes

• Never swallow karanja oil or seeds. The bitter compounds can cause nausea and vomiting if eaten [3], and the plant is described as poisonous [4]. Store the bottle where children cannot reach it.
• Pregnancy and breastfeeding: There is no safety research on karanja oil in pregnancy. NPF advises that some herbal remedies should be avoided during pregnancy and breastfeeding [7]. Check with your doctor first.
• Children: Do not use karanja or any herbal oil on a child's skin without asking a paediatrician or dermatologist.
• Blends with babchi: Many Ayurvedic skin oils also contain babchi (bakuchi), which can make skin more sensitive to sunlight. Avoid strong sun on treated skin. Read more in our babchi oil guide.
• Oral herbs such as giloy: Karanja is a topical oil, but if you are also taking Ayurvedic tablets, tell your doctor. Giloy, for example, has been linked to liver problems in some reports.
• Stop if it stings. NPF advises stopping any herbal product and contacting your doctor if side effects appear [7].

Karanja oil and conventional treatment

Steroid creams, vitamin D creams, phototherapy, methotrexate and biologics all have a real place in psoriasis care when used under a dermatologist's supervision. NPF says integrative approaches can be used alongside conventional treatment, after talking to your health care provider [7]. Please do not stop or reduce a prescribed medicine because you have started an herbal oil; stopping some treatments suddenly can cause a flare.

When to see a doctor

See a dermatologist promptly if you notice any of these:

• Patches spreading quickly over large areas of the body, or skin turning red all over
• Pus-filled bumps, especially with fever or chills
• Painful, swollen or stiff joints, particularly in the fingers, toes, knees or lower back
• Cracks that bleed, ooze, or look infected (warmth, yellow crust, increasing pain)
• Itching or pain that disturbs your sleep or work for more than a couple of weeks
• A rash, burning or swelling after applying karanja or any new product
• Psoriasis in a child, a pregnant woman, or someone with diabetes, kidney or liver disease

Frequently asked questions

Is karanja oil good for psoriasis?

Karanja oil is traditionally used for skin complaints and may help soothe dryness and flaking as an emollient. Lab and mouse studies are encouraging, but there are no good-quality human trials yet, so its benefit for psoriasis is unproven.

Can I apply karanja oil directly on my skin?

Many people apply it neat, but its strong smell and heavy texture mean it is often mixed with a lighter oil such as coconut or sesame. Always patch test first and avoid broken skin.

Can karanja oil be used on the scalp?

It is traditionally used in some scalp oils. Apply a small amount to the scalp, leave it for a short while, then wash with a mild shampoo. Stop if you notice burning or more redness.

Is karanja oil the same as neem oil?

No. They come from different trees. Both are bitter oils used in Ayurveda for skin, and they are often blended together, but their chemistry is different.

Can I drink or eat karanja oil?

No. Karanja oil is for external use only. Its compounds can cause nausea and vomiting if swallowed, and the seeds are considered poisonous.

Sources

1. Ghosh A, Tiwari GJ. Role of nitric oxide-scavenging activity of Karanjin and Pongapin in the treatment of Psoriasis. 3 Biotech. 2018;8:338.
2. Alex T, Mansuri S, Chaudhary S, Malviya N. Evaluation of anti psoriatic activity of Karanjin oil. Journal of Drug Delivery and Therapeutics. 2017;7(7):206-207.
3. Millettia pinnata (Pongamia pinnata): seed and oil composition. Wikipedia, with cited primary references.
4. Dhanmane SK, Salih FA. Isolation of Karanjin from Pongamia pinnata and its identification by different analytical techniques. Kurdistan Journal of Applied Research. 2018.
5. Cleveland Clinic. 14 Natural and Home Remedies for Psoriasis. 2024.
6. NHS. Psoriasis: Treatment.
7. National Psoriasis Foundation. Natural treatment options for psoriasis and psoriatic arthritis.

This article is for general information and is not medical advice. Please consult a qualified dermatologist or Ayurvedic doctor for diagnosis and treatment.