For one thing, we now know that large amounts of betacarotene can causes cancer, for another, this is really a useless supplement as parrots get more than enough betacarotene from a good diet and last but not least, the production of this oil is causing incalculable environmental loss - from natural habitats to actual killing of orangutans! If you are still giving your bird this, please reconsider.
https://www.onegreenplanet.org/environm ... -palm-oil/