Castor Oil for Your Face: Does It Help Wrinkles, Under-Eyes or Lashes?
Castor oil is a safe, thick moisturizer for most people, but no trials show it reduces wrinkles or grows lashes. What the evidence says, risks, and better options.
Castor oil is a thick plant oil pressed from the seeds of Ricinus communis, and it is all over social media as an overnight fix for wrinkles, under-eye bags and thin lashes. The short answer: castor oil is a reasonable occlusive moisturizer that is considered safe in cosmetics, and it can make skin feel softer and look temporarily plumper. There are no clinical trials showing that it reduces wrinkles, lifts under-eye bags or grows eyelashes. The one area with real trial data is eyelid inflammation (blepharitis), which is a medical condition to treat with your eye doctor.
The short answer
- About 90% of castor oil is ricinoleic acid, an unusual hydroxylated fatty acid that makes the oil very viscous (Burdock et al., Food Chem Toxicol, 2006).
- The Cosmetic Ingredient Review panel has concluded that castor seed oil and related ingredients are safe as used in cosmetics (CIR, Int J Toxicol, 2007; re-review 2025).
- No published human trials show castor oil reduces wrinkles or sagging.
- A small randomized trial found that castor oil on the eyelids twice daily for 4 weeks improved blepharitis signs and symptoms in 26 people (Muntz et al., Ocul Surf, 2021). It did not measure lash growth.
- Allergic contact dermatitis to castor oil and its derivatives is uncommon but documented.
What castor oil can and can't do for aging skin
What it can do: like petrolatum or other heavy oils, castor oil sits on top of skin and slows water loss. Hydrated skin reflects light better and fine dehydration lines look softer, which is why "before and after" videos look convincing the next morning. That effect fades within hours.
What it can't do: wrinkles from photoaging come from loss and damage of collagen and elastin in the dermis. Oils don't rebuild collagen. The ingredients with good evidence for that are topical retinoids, along with daily sunscreen to stop further damage (AAD: wrinkle remedies).
| Claim | Evidence |
|---|---|
| Moisturizes dry skin | Plausible; works as an occlusive |
| Reduces wrinkles | No human trials |
| Shrinks under-eye bags | No trials; bags are mostly fat and fluid |
| Grows eyelashes | No trials |
| Helps blepharitis | One small RCT, promising |
Castor oil for under-eyes
Under-eye bags are mostly caused by fat that shifts forward with age, fluid retention and genetics. A heavy oil can't change that. Dryness and crepey texture under the eyes can improve with any good moisturizer. If you want more, see our eye cream guide by age. Keep oils out of the eye itself; they can blur vision and irritate.
Castor oil for eyelashes and brows
Lash growth claims rest on anecdotes. The only FDA-approved lash-growth treatment is prescription bimatoprost 0.03% (Latisse), which has its own side effects to discuss with a doctor (DailyMed: Latisse label). Castor oil may coat lashes and make them look darker and glossier, which is real but cosmetic. An ophthalmology review warns that TikTok eye trends can harm eye health in young users (Al Hassan et al., Ophthalmol Ther, 2024).
How to use it safely
- Patch test on the inner forearm for 2–3 days before using it on your face.
- Choose a cold-pressed, hexane-free oil in a sealed bottle.
- Use a few drops on damp skin at night, or mix with your moisturizer. It is very thick.
- Skip it on acne-prone areas if you notice more breakouts.
- Stop if you get itching, redness or swelling. Case reports describe allergic contact dermatitis from castor oil in dressings and from castor-derived ingredients (Delgado-Prada et al., Contact Dermatitis, 2025; Shaw, Dermatitis, 2009).
Better-proven alternatives for wrinkles
- Retinoids (retinol, retinal, tretinoin). Compare options in retinol vs retinoid.
- Sunscreen every day. See sunscreen mistakes that age you faster.
- Niacinamide for tone and barrier support: niacinamide anti-aging guide.
- Ceramide moisturizers for a dry barrier: ceramides for skin barrier repair.
Frequently asked questions
Can I leave castor oil on my face overnight?
Yes, most people can, after a patch test. It can feel greasy and may transfer to your pillow. If you are acne-prone, watch for breakouts.
Is castor oil comedogenic?
It is not considered highly pore-clogging, but comedogenicity ratings are not reliable for every person. Your own skin's response is the best guide.
Is castor oil better than retinol for wrinkles?
No. Retinoids have decades of clinical evidence for photoaging. Castor oil has none for wrinkles. They can be used together, castor oil on top as a moisturizer.
Is castor oil safe around the eyes?
Applied to the lid margin, it was well tolerated in a small blepharitis trial. Don't put it in the eye, and see an eye doctor for red, crusty or irritated lids.
Does Jamaican black castor oil work better?
There is no evidence that roasted "black" castor oil works differently on skin. It has a different color and smell from the roasting process.
Bottom line
Castor oil is a safe, inexpensive moisturizer for most people, and its fast "plumping" effect is real but temporary. It does not rebuild collagen, shrink eye bags or grow lashes. For wrinkles, pair a retinoid with daily sunscreen. Talk to a dermatologist if you have sensitive skin or eczema, and to an eye doctor about eyelid problems.
This article is for educational purposes only and is not medical advice. Talk to your dermatologist or doctor about your situation.
Sources
- Burdock GA, et al. Toxicology and pharmacology of sodium ricinoleate. Food Chem Toxicol. 2006.
- Cosmetic Ingredient Review. Final report on the safety assessment of Ricinus communis (castor) seed oil and related ingredients. Int J Toxicol. 2007.
- Fiume MM, et al. Re-Review Summary of Ricinus Communis (Castor) Seed Oil and Ricinoleates. Int J Toxicol. 2025.
- Muntz A, et al. Randomized trial of topical periocular castor oil treatment for blepharitis. Ocul Surf. 2021.
- Delgado-Prada A, et al. Allergic contact dermatitis triggered by castor oil-containing dressings. Contact Dermatitis. 2025.
- Shaw DW. Allergic contact dermatitis from 12-hydroxystearic acid and hydrogenated castor oil. Dermatitis. 2009.
- Al Hassan S, et al. TikTok Trends Impacting Eye Health Among Children and Adolescents. Ophthalmol Ther. 2024.
- American Academy of Dermatology: Wrinkle remedies
- DailyMed (NIH): Latisse prescribing information
