Here’s what consumers have asked with answers from doTERRA staff and previous consumers.
Because people will buy doterra products, pull off the top without damaging it, remove some of the oil and replace it with something else to fill it up again to make a profit. This is not doterra approved
DoTERRA oils are pure and highly tested in house and by 3rd parties. And, they are very transparent about their testing results. Go to https://sourcetoyou.com to find test results on each batch of oil sold by doTERRA along with sourcing and other information. You can find the batch number stamped on the bottom of each bottle.