The essential oil content shows variations in plants of
different geographical origin and also in different parts of
the plant The composition of Mentha pulegium oil
collected from the Batak in the Rhodope Mountains
(Bulgaria) showed oil yields obtained by water and steam
distillation of 1.54% and 1.48%, respectively, and the
composition was characterized by a high content of
pulegone (42.9-45.4%), piperitenone (21.7-23.1%) and
isomenthone(11.3-12.8%) [24]. Similar studies reported
pulegone (73.4%) and isomenthone (12.9 %) in Uruguay
[22]; pulegone (43.5%) and piperitone (12.2%) in Egypt