what does u/g mean
ug and mcg are both symbols for 'micrograms'. The correct symbol for microgram is actually g. However, there is no way of typing that on a keyboard, so they came up with other versions, two of which are ug and mcg.g and mcg are both symbols for 'micrograms'. The correct symbol for microgram is actually g. However, there is no way of typing that on a keyboard, so they came up with other versions, two of which are ug and mcg.