If you have a healthy liver, I would take NAC (capsules are easy to swallow).  (NAC also protects your liver!) Your body should be able to make Glutathione from the NAC and other nutrients like vitamin D3.  To aid in COVID-19 protection add high dose Vit C (liposomal if possible), K2 and Zinc.    Another good source of sulphur which should convert to Glutathione in your body is raw garlic.  Take a clove or two of garlic.  Chop it up into chunks and let set for 15 minutes to develop the allicin.  Then swallow like pills. FYI, another Anon on this board posted that we should stay away from Tylenol.  It depletes your glutathione.  Take another pain killer like ibuprofen....  Best of luck to you! (FYI - if you have a hard time with swallowing pills you can take liposomal Glutathione in liquid form. )