Specifically, the doctor was extolling the virtues of red palm oil (RPO), which in industry parlance would be the crude oil extracted from carefully selected fresh fruit bunches of the oil palm tree (Elaeis guineensis).
The beautiful red colour, akin to the colour of a ready-to-drink Ribena (a blackcurrant drink), comes from the high content of beta-carotenes (precursor to Vitamin A) found in the oil palm fruitlets. The manufacturing of RPO via a gentle refining process preserves the maximum amount of natural vitamin content in the oil.