Observations on Vitamin analysis: Odor: The only one with an odor is B1 (Thiamine), and that’s due to an ever-present miniscule breakdown product of the odorless parent molecule. Bulk Retinol concentrate has a faint creamy rose odor, possibly from tiny amounts of diterpene breakdown products. Color: The water soluble vitamins are all white powders, with … Continue reading Vitamin analysis, observations