Can you take too much CBD vape oil? Is there a certain amount that can be harmful? We appreciate that you're asking, because a responsible consumer knows they shouldn't overdo it with any substance, including CBD vapes or tinctures - even too much water can be bad for you! Since everyone has an ideal dosage for their particular needs, is there an amount that becomes too much or even hurtful? Many researchers have said that it's difficult to overdose on CBD. There have been some concerns with CBD’s effects on the liver at very high amounts, but it is still being researched and seems to be only for people with liver issues or who are taking other medications that are very hard on their livers. Read on to learn more about proper dosage for vaping CBD.