Major producering countries for Mentha oil in the world are India, China and Brazil. India is the largest producer and exporter of Mentha oil in the world.
Mentha arvensis is cultivated foothills of Himalayas in Punjab, Haryana, Himachal Pradesh, Uttar Pradesh and Bihar.

Distillation of dried leaves / fresh leaves is done. By steam distillation and filtration, a dark yellow to pale yellow volatile oil is obtained. Leaves and
flowering tops give the highest yield. About 50% of menthol can be separated out in crystalline form on cooling the oil. 

General Characteristics 
Mentha oil is obtained by steam distillation of Mentha arvensis leaves. Mentha oil and its constituents and derivatives are used in food, pharmaceutical and perfumery and flavouring industry.
Menthol is the main constituent of mentha oil and slow cooling through refrigeration, crystallization, centrifugation and drying is done to obtain it.
It is used in the manufacture of lozenges, toothpastes, pain balms, cold balms etc.