Browse our collection of faq — expert-written content you can trust.
Birch oil is mostly methyl salicylate, an aspirin relative. Here is why we keep it away from pregnancy and children, and how to store the bottle.
Swallowed, on skin or in eyes: the order of steps poison authorities give for birch and wintergreen oils, and a cupboard card to keep nearby.
What sweet birch is, what our Certificate of Analysis lists, how small a dose to start with, who should skip it, and how to store the oil.
Birch smells wonderful to us, but dogs are different. What veterinary sources say about exposure, diffusing and storage, and who to call first.