Studies have shown there is no specific amount of CBD oil to take.
Dosages will vary from person to person and from condition to condition.
Professionals recommend that you listen to the supplier who you purchase your CBD oil from and then slowly over a period of weeks just keep varying doses and making small adjustments until you find the dose which best suits you and your condition.
An average male is around 70-80kg and it is recommended to start at 35mg per day building up to 70mg per day. Females should reduce this amount accordingly to accomodate their frame and tolerance.