DexCom Inc. (DXCM) recently announced the availability of Stelo, the first over-the-counter (OTC) continuous glucose monitoring (CGM) biosensor in the United States. The biosensor is available for purchase without a prescription at Stelo.com.Dexcom glucose biosensors are a vital and effective tool for managing diabetes as they produce good clinical results independent of medication use and may even be able to slow down the disease's progression. Glucose biosensors, such as Stelo, can increase the efficacy o ...