HYPOALLERGENIC SAFE GLYCERIN MIXING AGENT. Hawthorne’s Glycerin and Peppermint is often administered orally to sooth and lubricate air passages allowing for easier breathing. In this application typically 30 cc is administered orally using an oral syringe, prior to exercise. Our Hawthorne Products Glycerin is mixed with peppermint oil adding the aromatic and possibly the decongestant quality of the peppermint oil. Peppermint is also known to sooth the stomach and help in ulcer situations. Horses usually love peppermint. Available in Quart only.