I have had a loss of taste and smell, on and off for over 1-1/2 years because of Covid. Two things have helped me: first, a vibration plate. It engages your lymphatic system. Second, homemade kefir. I'm pretty astounded that I was able to taste my breakfast this morning! The only changes I've made lately is getting off all vitamin supplements and drinking my homemade kefir yesterday (just a few tablespoons) and today (about half a cup). Amazed!!