µg = microgramme = 1/1,000,000 of a gram
iu = international unit = measure the activity of many vitamins
standardised extract = the distillation of the active ingredients fom a herbal product that provides consistent levels of the active ingredients. This is often expressed as a ratio, which shows the amount of the herbal product required to achieve the extract.
The EU has defined the Recommended Daily Allowance (RDAs) for a range of nutrients at amounts which are considered to be sufficient to prevent deficiency in most adult individuals in the population. The EU has not set RDAs for some nutrients. These do not necessarily represent the amount needed to maintain good health, merely the amount needed to prevent the onset of deficiency problems.