If you’re referring to the viral “castor oil on your feet” trick, the claims aimed at people over 65 are much stronger than the evidence.
Castor oil is a moisturizing/occlusive oil, so applying a small amount to dry heels can soften the skin and reduce moisture loss. But there is no good evidence that rubbing castor oil on your feet detoxes the body, lowers blood pressure, removes toxins, or treats arthritis or other internal diseases.
If you want to use it for dry feet
- Wash and dry your feet.
- Apply a thin layer of castor oil to dry heels or rough skin.
- Put on clean cotton socks overnight.
- Stop if you develop irritation or a rash.
If you have diabetes, poor circulation, numbness in your feet, open sores, or a foot infection, it’s better to ask a healthcare professional before experimenting with home remedies. Foot problems can become serious more quickly in these situations.
For severely cracked heels, a urea-containing foot cream generally has better evidence than castor oil.
