doTERRA On Guard， a proprietary essential oil blend， provides a natural and effective alternative for immune support.* As one of doTERRA's best-selling blends， doTERRA On Guard protects against environmental and seasonal threats with essential oils known for their positive effects on the immune system.* doTERRA On Guard can be taken internally on a daily basis to maintain healthy immune function and support healthy cardiovascular function.* It can also be used on surfaces throughout the home as a non-toxic cleaner.* When diffused， doTERRA On Guard helps purify the air， and can be very energizing and uplifting. doTERRA On Guard provides cleansing and purifying benefits. Add two to three drops in a veggie capsule for a quick immune boost.* Add to water for an effective all-purpose surface cleaner. Soak sliced apples in water and a few drops for a healthy， immune-boosting snack.* Combine a few drops of doTERRA On Guard with Fractionated Coconut Oil for a natural hand cleanser.