Health: Experts weigh in on TikTok’s castor oil hype for skin and hair
Doctors say castor oil can moisturize skin and coat hair, but evidence for hair growth or skin cures is lacking, and safety concerns remain, especially for pregnant individuals.
Social-media videos on TikTok have amplified a belief that castor oil can do more than relieve constipation. Some creators claim it improves skin conditions, soothes eczema, or promotes hair growth. Medical experts caution that there is little robust evidence that a single ingredient—castor oil—can produce reliable results for hair growth or skincare. The U.S. Food and Drug Administration approves castor oil only for oral use as a stimulant laxative and it is not recommended as a first‑line treatment for constipation today.
Castor oil is derived from the ricinus communis plant, is typically yellow and odorless, and is widely used as an ingredient in cosmetics. When used topically, ricinoleic acid helps the skin hold moisture, which is why it appears in moisturizers. Dermatologists say castor oil can be deeply moisturizing and may help create a barrier against moisture loss, offering relief for dry skin, particularly in harsh climates. However, heavy oils can leave a greasy feel and may clog pores, potentially aggravating acne-prone skin. Some clinicians recommend pairing castor oil with other moisturizers that include ceramides or niacinamides to balance hydration and barrier support. There is also a risk that castor oil can cause cramping, abdominal pain and diarrhea if taken by mouth, and frequent use may lead to dependence on stimulation for bowel movements, doctors say.
On the hair side, social-media posts claim castor oil moisturizes the scalp, prevents shedding, and fuels growth. Medical professionals say there are no strong or conclusive clinical trials linking castor oil directly to increased hair growth. At best, it may improve the appearance of hair by reducing breakage and adding shine by coating strands and providing moisture. It may be more helpful for thicker, coarser hair; for finer hair, the oil's heaviness could weigh it down. Scalp application can soothe dryness and flaking when used as part of a multi‑oil approach, such as mixing with rosemary oil.
Safety concerns: castor oil is generally safe for most people to use on skin and hair, but there are risks. It can clog pores and cause acne for some users; allergic reactions can occur; discontinue if redness or itching occurs. Pregnant people should avoid it; taking it orally or using it on skin or hair could potentially trigger contractions or labor. Dermatologists encourage cautious use, particularly on the face, and suggest that it may be better as a body moisturizer than a facial product if the goal is to soothe irritation.
Should readers try it? Many dermatologists emphasize that self-care should be evidence-based and not rely on single products from social media. Castor oil can act as an occlusive moisturizer that seals in hydration, but its thickness makes it unsuitable for everyone. Those with acne or sensitive skin should approach with care or seek guidance from a dermatologist. If castor oil is used, it should be part of a broader skincare routine rather than a stand-alone solution. For persistent dry skin or hair concerns, professional evaluation is recommended.
Bottom line: Castor oil may help with moisture and scalp comfort when used cautiously, but there is no strong science showing it promotes hair growth or cures skin conditions. It is not a first-line treatment for constipation today, and there are safety considerations to weigh, particularly during pregnancy. Consumers should consult dermatologists or other healthcare professionals to tailor advice to their specific needs.