Is it better to take NAC or glutathione directly?

Glutathione taken by mouth is poorly absorbed, which is the practical argument for taking the precursor instead. Liposomal versions claim to solve the absorption problem, wrapping the molecule in a fatty carrier. But the comparative evidence in people is limited, so nobody can reliably tell you which route delivers more.

NAC or milk thistle for the liver?

They work through different mechanisms, and neither is a treatment for liver disease. If you have a diagnosed liver condition, you should be under medical care rather than choosing between two supplements. That is not a hedge; it is the difference between monitoring and guessing.

What is GlyNAC and is it better than NAC alone?

GlyNAC pairs NAC with glycine, on the reasoning that glycine is the other amino acid your body needs to build glutathione. The human studies are small and mostly in older adults, which makes it promising rather than proven. If the pairing beats plain NAC, it has not been properly settled.

Can you take NAC with vitamin C or alpha-lipoic acid?

There is no known problem with either. Vitamin C and alpha-lipoic acid turn up in the NAC supplement formulas. None of the three interferes with the others as far as anyone has found.

Does NAC help with hangovers?

The evidence does not support it. This is one of the most confidently repeated claims online and one of the least substantiated, resting on mechanism rather than on trials in people. There is no good reason to expect it to do anything here.

Should you cycle NAC or take it continuously?

There is no evidence either way in healthy people. The trials that found positive NAC benefits dosed continuously from 12 weeks to a full year. Any NAC cycling protocol you read is a suggestion rather than a backed finding.

NAC (N-Acetylcysteine) Review: Benefits, Dosage & Evidence