Yes you can use shilajeet with green tea. To find your optimal dosage, begin by taking a piece about the size of a grain of rice (~100 mg) once per day. In a few days, take the same amount 2-3 times per day. Then gradually increase the amount of shilajit taken with each dose up to a large pea size (~300 mg) until you achieve the desired benefits. Studies report shilajit's antioxidant activity protects against cellular damage, and it's this cellular damage that speeds the aging process in your heart, lungs, liver, and skin. The fulvic acid in shilajit delivers antioxidants and minerals directly to cells where they're needed.