Skincare
Castor Oil in the Navel
There is no anatomical channel from the umbilicus to anywhere. The navel is closed scar tissue, not a port.
Also called: belly button oil · navel oiling · castor oil belly button
Verdict — cope
The mechanism does not hold. Your time is better spent elsewhere.
Evidence grade D
Nobody has demonstrated this works. Note that this grades the evidence, not the danger — read the verdict for that.
Mechanism
The umbilical vessels obliterate at birth into fibrous ligaments. Nothing applied to the skin of the navel has systemic access that skin anywhere else on the body does not.
Citations
- Anatomy of the umbilicus and the obliterated umbilical vesselsClinical Anatomy · 2012
The full read
This one is settled by anatomy rather than by evidence grading. The claim rests on the navel being a special absorptive site connected to the abdominal organs; it stopped being connected to anything the day you were born. Castor oil on the navel is castor oil on a patch of abdominal skin — mildly moisturising, occasionally irritating, and with no route to your face, your hormones or your digestion. The related brow and lash version is graded separately under `castor-oil-brows`, where at least the oil is on the tissue in question.
