Vitamin A is the name of a group of fat-soluble molecules referred to as retinoids. Retinoids belong to the terpene family and are sourced from both flora (plants) and fauna (animal sources). Terpenes occur in aromatic substances and spice plants, cellular structuring substances, hormones, and vitamins.1 Their molecular structures include retinol, retinaldehyde, retinoic acid. Retinoic acid shows the most biological activity.2 Retinoic acid modulates gene…