How much salvinorin A does a Salvia divinorum plant contain?
There is no definitive information about the range of quantities of salvinorin A in Salvia divinorum leaf. However, some valuable data does exist. Salvinorin A content was looked at systematically by the John Gruber group. The range they found was 0.89 mg to 3.70 mg per gram of dried leaf, but most samples analysed were in the mid-range at about 2.5 mg/g (Gruber 1999). Non-published underground researchers have reported content percentages higher than 2.5 mg/g in dried leaf that was considered “good quality”, including reports of 4-5 mg/g. However, since the extraction, purification, and weighing methods for these informal reports have not been published, it is impossible to know how accurate these figures are.
