using liposomal supplements solves the problem of absorption for many supplements. I recall there was something specific about glutathione that made the liposomal only partially more effective than non-liposomal but here is one brand that I have used. They may sell only to doctor offices now but they still sell to me as I used to buy in bulk. Maybe if you told them Dr Johnson from Florida referred you they would sell in smaller batches. I will try to look up the specifics of glutathione and why liposomal only partially solves the absorption problem and report back to you:
https://lippomix.com/glutathione.php