Castor oil for skin: Benefits, uses and risks

What is castor oil?

Castor oil is a vegetable oil extracted from the seeds of Ricinus communis, the castor bean plant. About 90% of its fatty acid content is ricinoleic acid. Purified castor oil does not contain ricin, the toxin found in the plant's seeds. That distinction matters: purified oil and raw castor beans are not interchangeable.2

What are the benefits of castor oil?

The most practical benefit is helping skin hold onto moisture. Castor oil is used in moisturizers and cosmetics for that purpose. Moisture retention is a useful benefit, even if it is a smaller job than the internet has assigned the bottle.1

Possible benefits include improved hydration, elasticity and pigmentation, but castor oil is not an established treatment for wrinkles, dark spots or acne. Much of its therapeutic use rests on traditional experience and early laboratory findings rather than large clinical trials. Anti inflammatory, antimicrobial and antioxidant properties are reasons to investigate an ingredient, not reasons to replace a treatment with a bottle of oil. There is no established strength, dilution ratio or treatment course for using pure castor oil to correct these concerns.2

Can you use castor oil on your face?

Castor oil appears in facial skincare, but using a finished moisturizer is different from applying pure oil. Pure castor oil can cause contact dermatitis, an irritated or allergic skin reaction. If your skin is already sensitive, that risk is a reason to favor a moisturizer suited to your skin rather than experimenting with pure oil.1

Hydrogenated castor oil and polyethylene glycol, or PEG, castor oil derivatives are chemically modified forms. They often help a formula stay stable, mix properly or deliver other ingredients. Seeing one of these names on a moisturizer does not make the moisturizer equivalent to pure castor oil. Judge the finished product by its purpose and directions.2

How should you use it?

Use the directions on your particular product rather than treating every castor oil bottle as the same skincare formula. For example, Shenzhen Xiaomai's CASTOR oil liquid label directs application after cleansing, with gentle massage, morning and evening. That is a direction for that product, not a universal schedule for pure castor oil.3

For dry facial skin, the following is general moisturizing guidance, not a special castor oil protocol. A facial moisturizer containing ceramides, hyaluronic acid or squalane is a more straightforward starting point. Choose a fragrance free product; unscented does not necessarily mean free of fragrance related irritants.4

1. 1Wash gently with cooler water rather than hot water. Avoid scrubbing dry patches.
2. 2Pat your skin dry with a soft touch.
3. 3Apply facial moisturizer within five minutes of washing. For dry skin, moisturize multiple times daily.
4. 4Protect your skin during the day with broad spectrum, water resistant sunscreen with SPF 30 or higher.

If retinol is making your skin dry, balance the routine with moisturizing products, such as those containing hyaluronic acid. Avoid trying to scrub away the resulting flakes: exfoliation can remove more of the skin's protective surface and leave damaged skin to heal.4

What should you expect, and how long does it take?

Think of castor oil as a moisturizing ingredient, not a scheduled correction for pigmentation or wrinkles. There is no reliable timeline for those changes or an established optimal treatment regimen. Castor oil packs also have no proven skin clearing or detox benefit, despite giving a bottle of oil a second career as a wellness department.12

Is castor oil good for skin?

Castor oil has a useful role as a moisturizing ingredient, but pure oil is not necessary for a good skincare routine. For oily skin, dermatologists favor a gentle foaming face wash and oil free products. If your main problem is acne, dark spots or persistent irritation, do not substitute castor oil for treatment of that concern.15

When should you stop or get medical advice?

• Do not apply the CASTOR oil liquid product to damaged or broken skin.
• Keep it out of your eyes. If it gets into your eyes, rinse with water.
• Stop using it and ask a doctor if a rash develops.
• If you are pregnant or breastfeeding, the CASTOR oil liquid label tells you to ask a doctor before use.
• Keep the product away from children. If swallowed, get medical help or contact a Poison Control Center immediately.

Get medical advice if facial dryness is not improving, looks wet and red, stays pink, or causes itching severe enough to interfere with daily life. Persistent dry skin sometimes needs treatment for an underlying cause rather than another moisturizing product.4