Jamaican black castor oil is one of the most faked and most marked-up bottles in the whole beauty aisle. This is a plain buying guide to it: what the real thing actually costs by the ounce, how the little growth serums mark that same oil up several times over, and the part almost nobody checks, that a lot of what is sold as Jamaican black castor oil never came from Jamaica and was never roasted. Jamaica’s own government and its top university are now building a national standard to prove it.

This is a buying guide, not a lecture. Inside:

– Why the price per ounce is the only number that matters, and how the smaller bottle is almost always the worse deal.
– Tropic Isle Living, the family-owned original, and how to buy it straight from the source.
– SheaMoisture’s Jamaican Black Castor Oil serum, owned by Unilever since 2017, and what the “growth” premium is really paying for.
– The geographic-indication push, the University of the West Indies DNA test that can tell real Jamaican castor from imitation, and the buyer-beware notices Sunny Isle and Tropic Isle publish about fakes of their own products.
– The 30-second test you can run at your own sink to tell a real bottle from a diluted one.