Mentha oil futures for April fell by Rs 9.10, or 0.85%, to Rs 1,055.10 per kg in 445 lots.
At the Multi Commodity Exchange (MCX), the May contract lost Rs 5.70, or 0.54%, to Rs 1,045.10 per kg in 66 lots.
Prices fell as traders indulged in profit-booking driven by subdued physical demand.
Sentiment weakened further due to adequate stocks position following increased arrivals from Chandousi in Uttar Pradesh.