I've been taking it (N-acetyl cysteine) with Dr approval. I tried two short tests last Dec and it seemed to help. My latest test has been going for ~ 2 months and is less obviously successful.
At the start in Feb I took 600 mgm while I was still on HU only, at 500. My symptoms got worse (usual malaise dizzy etc). I started Bes with Hu transition and nothing special happening via NAC.
I increased to 1200/day NAC and some improvement but normal variation can more than explain that. Then the post from Paul 213456 on allele vs NAC (see upper middle of this thread)
healthunlocked.com/mpnvoice...
got my attention and I cut the NAC dose to 500-600. Awaiting Paul's next allele results for more info.
I recently added a daily dose of Lysine just because. It correlated to an improvement but that is a long way form "causing" the improvement. Lysine is an amino acid, and in other posts I've noted the table that lists amino acids broadly as beneficial. (see image here) NAC stands out as the best option and this table is why I tried it.
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In the reply below, see my complete metabolic, some evidence of liver/kidney benefits for NAC.
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My conclusion is I don't have one so far; but clearly for me NAC is not the magic ticket I had hoped in the short term. I'm hoping for good old science and its INF therapy to help symptoms over the long term.
My thought on supps is to quit unless I see a reason to keep it going. I'll continue the NAC+ Lysine for now.