Psoralea Seeds (Babchi): Uses, Research and Skin Safety

Short answer: Psoralea seeds, known as babchi in Ayurveda and bu gu zhi in Chinese medicine, are used mainly for vitiligo and psoriasis. They contain psoralens, compounds that make skin react strongly to sunlight. That’s how they may help darken white patches, but it’s also why they can cause painful burns and blisters. They’ve also been linked to liver injury. Don’t take them without a doctor’s supervision. Bakuchiol, a skincare ingredient made from the same plant, is a different and much gentler product.

Psoralea corylifolia, now often classified as Cullen corylifolium, is a small annual herb that grows in India, China and Southeast Asia. Its small, dark, bean-shaped seeds have been used for centuries in Ayurvedic, Unani and traditional Chinese medicine, mostly for skin conditions. You’ll find them sold as babchi powder, babchi oil, capsules and blended herbal products.

This guide looks at psoralea seeds health benefits that research supports, how the seeds act on the skin, the serious sun and liver risks, and how babchi differs from bakuchiol skincare. For other herbs, see our herbs and teas guides.

Psoralea seeds at a glance

Botanical name: Psoralea corylifolia L. (also Cullen corylifolium)
Other names: Babchi, bakuchi, bu gu zhi, Fructus Psoraleae
Main compounds: Psoralen, isopsoralen (angelicin), bakuchiol, flavonoids
Traditional uses: Vitiligo, psoriasis, other skin conditions
Main risks: Severe sunburn and blistering, liver injury
Food use: None: these seeds aren’t eaten as food

What are psoralea seeds and how do they work?

The seeds’ best-known compounds are psoralens, mainly psoralen and isopsoralen. Psoralens are photosensitizers: on their own they do little, but when skin containing them is exposed to ultraviolet (UV) light, they react with the DNA in skin cells.

That reaction is the basis of a real medical treatment called PUVA (psoralen plus UVA light), which dermatologists have used for decades for psoriasis and vitiligo. In PUVA, a measured dose of a purified psoralen drug is combined with a precisely controlled dose of UVA light in a clinic. With babchi, neither the psoralen dose nor the sun exposure is controlled, which is why burns happen.

The seeds also contain bakuchiol, a compound with no psoralen-like light sensitivity, which is now extracted for skincare. That’s why “babchi” and “bakuchiol” products behave very differently, even though they come from the same plant.

What the research shows

Most studies of psoralea seeds are small, short and of low quality, and many don’t report side effects properly. Each finding below carries an evidence label, explained in our editorial policy.

Vitiligo Limited evidence

Vitiligo causes white patches where the skin has lost its pigment. Babchi, taken by mouth, applied as a paste or oil, and combined with sun exposure, is a traditional treatment, and some small trials have reported partial repigmentation. But a 2021 systematic review of plants used for vitiligo found most trials focused on whether patches improved, with safety poorly recorded. The same review listed blistering, skin redness, acute hepatitis and mutagenic effects among the harms reported with psoralea. There’s no good-quality evidence that babchi works as well as, or as safely as, medical treatment.

Psoriasis and other skin conditions Limited evidence

Psoralea is used traditionally for psoriasis and other scaly skin conditions, in the same way psoralens are used medically in PUVA. Controlled trials of the herb itself are lacking, and the burn and liver risks are the same as for vitiligo.

Skin aging, with bakuchiol creams Moderate evidence

Bakuchiol, purified from the seeds, has been tested as a gentler alternative to retinol for wrinkles and uneven skin tone. One well-designed trial found it may work about as well as retinol, with less irritation.

What the research actually found

Who: 44 adults with sun-damaged facial skin
What: 0.5% bakuchiol cream twice a day vs 0.5% retinol cream once a night, double-blind
How long: 12 weeks
Result: Both reduced fine wrinkles (by about 19% with bakuchiol and 23% with retinol, not significantly different) and improved dark spots. Retinol caused significantly more scaling and stinging

A single small trial, so it’s an encouraging signal rather than proof. It applies only to purified bakuchiol creams, not to babchi seeds or oil. Read the study.

Bone health, infections and other uses Limited evidence

Extracts of the seeds have been studied in lab and animal research for bone loss, bacteria and inflammation, and the seeds are used in Chinese medicine as a kidney “tonic”. None of these uses has been tested properly in people.

How babchi is used, and the risk of each form

No clinical trial has established a safe and effective dose of psoralea seeds, so we don’t give one. If a practitioner recommends babchi, use it only under medical supervision with liver blood tests. The table shows the common forms and their main risks.

Psoralea products and their main risks
Form	How it’s used	Main risk
Seed powder (churna), capsules, tablets	Taken by mouth, often with sun exposure for vitiligo	Liver injury; burns and blistering in the sun
Babchi oil or seed paste	Applied to white patches, then exposed to sun	Severe phototoxic burns and blisters
Chinese herbal formulas (bu gu zhi)	Decoctions or granules, usually mixed with other herbs	Liver injury; product quality varies
Bakuchiol serums and creams	Applied to the face, usually 0.5–2% bakuchiol	Occasional redness or irritation

Sources: NIH LiverTox (Psoralen); Hussain (2021) systematic review of plants used for vitiligo; Dhaliwal et al. (2019) bakuchiol trial.

Tip: read the ingredient list, not the front of the bottle. “Babchi oil” and “bakuchi oil” contain psoralens and can burn your skin in sunlight. A serum listing “bakuchiol” as a purified ingredient doesn’t carry the same light sensitivity.

Side effects and who should avoid it

Psoralea seeds are a medicine-strength herb, not a food supplement. Two risks stand out.

Burns and blisters: taking babchi or applying its oil, then going into the sun, can cause severe redness, blistering and skin peeling that looks like a burn injury. Doctors have published cases where babchi oil reactions looked just like burn injuries.
Liver injury: NIH’s LiverTox database rates psoralens as a probable rare cause of liver injury. Herbal psoralea products have caused hepatitis, usually 1 to 2 months after starting. In one reported case, a woman developed jaundice and severe liver inflammation after about seven weeks of taking a psoralea seed product, and recovered after stopping it. Symptoms to watch for include nausea, stomach pain, dark urine and yellowing of the skin or eyes.

Medical psoralen treatment with UV light has also been linked with a higher long-term risk of skin cancer, which is one more reason UV-plus-psoralen treatment is done only under a dermatologist’s supervision.

Who should be careful

Everyone using babchi: only use it with a doctor’s supervision, have liver blood tests, and protect treated skin from the sun. Stop and see a doctor if you get blisters, a severe burn, or symptoms of liver trouble.
Liver disease or heavy drinking: avoid psoralea products completely. Psoralen-related liver failure has been reported in someone with existing liver damage.
Pregnancy and breastfeeding: avoid babchi and psoralea products. There’s no safety data.
Children: don’t give babchi to children unless a dermatologist is supervising.
Medicines that increase sun sensitivity: antibiotics such as doxycycline, some diuretics, retinoid pills and others can add to the burn risk. Ask your pharmacist.
People with a history of skin cancer, lupus or light-sensitive conditions: avoid psoralens unless your dermatologist recommends them.

Product quality: what else might be in the bottle

Babchi is sold mostly online and in specialist shops, often as part of Ayurvedic blends. Quality control varies a lot. A US study published in JAMA bought Ayurvedic medicines online and found that about 1 in 5 contained detectable lead, mercury or arsenic, including some made by US manufacturers.

Herbal products in the US are sold as dietary supplements, which means the FDA doesn’t check that they work, or that they contain what the label says, before they go on sale. If you and your doctor decide to try a psoralea product:

Choose a product that names the species (Psoralea corylifolia) and part used (seed), with a batch number.
Look for a certificate of analysis that includes tests for heavy metals.
Avoid blends that don’t list how much of each herb they contain.
Keep the packaging, so you can show your doctor exactly what you took if you have a reaction.

Babchi vs bakuchiol vs retinol

These three get confused online, so here’s how they compare.

Babchi, bakuchiol and retinol compared
	Babchi (seed, oil, powder)	Bakuchiol (purified)	Retinol
What it is	Whole seed or crude extract	One compound extracted from the seed	A form of vitamin A
Main use	Vitiligo, psoriasis (traditional)	Skin aging, uneven tone	Skin aging, acne
Contains psoralens	Yes	Should not, if properly purified	No
Sun sensitivity	High: can cause burns	Low	Moderate: use sunscreen
Pregnancy	Avoid	Limited data; ask your doctor	Avoid
Human evidence	Small, low-quality trials	One good 12-week trial	Many trials

If your goal is smoother skin, a bakuchiol or retinol cream is the safer route. If your goal is treating vitiligo or psoriasis, see a dermatologist rather than using babchi at home.

Proven treatments for vitiligo and psoriasis

Both conditions have effective medical treatments that work better and more safely than home use of babchi. For vitiligo, dermatologists use prescription creams, narrowband UVB light therapy and, for some people, newer anti-inflammatory creams and tablets. For psoriasis, options range from medicated creams to light therapy and modern injectable or tablet treatments. PUVA, the supervised medical version of psoralen and light, is still used in some cases.

A dermatologist can also check whether white patches are really vitiligo, since other conditions can look similar. See our medical disclaimer.

More guides you may find useful: eyebright and dandelion tea.

Psoralea seeds FAQ

Does babchi oil cure vitiligo?

No. Some people see partial repigmentation, but the evidence comes from small, low-quality studies, and babchi oil plus sun can cause serious burns. A dermatologist can offer treatments with much better evidence.

Can you eat psoralea seeds?

They aren’t a food. They’re sold as an herbal medicine, and taking them by mouth has been linked to liver injury and severe sun sensitivity. Only use them under medical supervision.

Is bakuchiol the same as babchi?

No. Bakuchiol is one compound purified from babchi seeds and used in skincare. It doesn’t carry babchi’s strong sun sensitivity, and it has better evidence for skin aging. Babchi seeds and oil contain psoralens; purified bakuchiol shouldn’t.

Is bakuchiol safe during pregnancy?

There’s very little safety data. It’s often suggested as a retinol alternative in pregnancy, but because it hasn’t been studied in pregnant women, check with your doctor or midwife first.

Is babchi powder safe to take every day?

There’s no established safe daily dose. Liver injury has been reported after daily use for one to two months, and taking it daily raises the chance of sunburn. If you use it, do so only with a doctor who checks your liver blood tests.

How long does babchi take to work for vitiligo?

Traditional practitioners usually describe months of daily use. There’s no reliable data on how long it takes or how often it works, and the liver risk tends to appear within the first one to two months, so medical monitoring matters.