Since 1992 Standardized All NaturalTraditionally Eucalyptus Oil has been used as a muscle rub, decongestion aid, antiseptic and as an insect repellent.Olympian Labs President"s Guarantee:We select only the finest Eucalyptus Oil and guarantee potency and purity in every bottle. I guarantee that all Olympian Labs products are of the highest quality ingredients and lab assayed to ensure that what we say is on the label is actually in the product. When you buy an Olympian Labs product, you can be sure you are buying the best.