Reduced L-Glutathione is what I use. You can purchase it capsule or in powder form. I was directed for "my issue" (1) 500mg capsule x daily [nebulized] with 3% saline (4ml). If using powder 1/5 of a teaspoon Reduced L-Glutathione 4ml saline 2x daily. I am not a doctor, but this is the regimen. Mix the above, until the reduced L-Glutathione is completely dissolved into the saline before nebulizing. I use a Pari Vios nebulizer, and a session is about 10 minutes.