GRAPEFRUIT
Cold pressing of the fruit peels. 1 kg of essential oil is obtained from 200 kg of grapefruit
Citrus scent reduces the time in which one is unable to act due to stress and makes one more reactive and alert. Grapefruit also prevents the breakdown of acetylcholine. This increases the duration of action of the neurotransmitter (the effect of medication is significantly improved).
Source:
https://medizin-transparent.at/medizinen-uberdosis-durch-grapefruit/