At the Multi Commodity Exchange, mentha oil for delivery this month declined by Rs 7.60, or 0.74 per cent, to Rs 1,007.10 per kg in a business turnover of 32 lots.
Likewise, the oil for delivery in February was trading lower by Rs 4.60, or 0.45 per cent, to Rs 1,023.30 per kg in 102 lots.
The fall in mentha futures was mostly due to profit- booking by speculators after recent gains and increased supplies in the spot markets against sluggish demand, analysts said.