Glutathione is known as the mother of all antioxidants and a super liver detoxifier.
In addition to folate and vitamin b6 and b12 sulfur is an important precursor.
You can supplement folate (especially as 5-methyl-folate NOT folic acid), b6 and b12 but what about sulfur? Many people do not eat nearly enough cruciferous vegetables that provide the highest amount of sulfur. Can you safely/effectively supplement sulfur? Have you done it?
I have never seen a sulfur supplement in capsules. Only in powdered form I would imagine it is pretty stinky.