N-acetyl-cysteine, does it treat long COVID?

With studies.

N-acetyl-cysteine is also called NAC, n-acetylcysteine. It is hard to get on US Amazon but can be found on Ebay.com.

What is long COVID? It is thought to be a side effect of the spike protein in the vaccine. Symptoms included general malaise, fatigue that won’t go away, trouble concentrating or thinking.

April 2019. The body can break down graphene oxide in the vaccine. "Biocompatible N-acetyl cysteine (NAC) reduces graphene oxide and persists at the surface as a green radical scavenger." https://pubmed.ncbi.nlm.nih.gov/30892320/ and https://doi.org/10.1039/c9cc00429g But NAC has been linked to cancer formation, see

Possible treatment for microvascular disease

I was able to find these studies.

Dexamethasone and Nutraceutical Therapy Can Reduce the Myalgia Due to COVID-19 - a Systemic Review of the Active Substances that Can Reduce the Expression of Interlukin-6. "According the scientific literature nutraceutical therapy associated with dexamethasone can reduce the expression of Interlukina-6(IL-6) and myalgia due to COVID-19." Abstract: https://pubmed.ncbi.nlm.nih.gov/35422571/ Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8976893/ Cite: Ripani U, Bisaccia M, Meccariello L. Dexamethasone and Nutraceutical Therapy Can Reduce the Myalgia Due to COVID-19 - a Systemic Review of the Active Substances that Can Reduce the Expression of Interlukin-6. Med Arch. 2022 Feb;76(1):66-71. doi: 10.5455/medarh.2022.76.66-71. PMID: 35422571; PMCID: PMC8976893.

Nov 2020. N-Acetylcysteine to Combat COVID-19: An Evidence Review. Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7649937/ From the study: "N-acetylcysteine (NAC) is inexpensive, has very low toxicity, has been FDA approved for many years, and has the potential to improve therapeutic strategies for COVID-19. NAC administered intravenously, orally, or inhaled, may suppress SARS-CoV-2 replication and may improve outcomes if used timely."

And here’s a poorly done study.

Double-blind, Randomized, Placebo-controlled Trial With N-acetylcysteine for Treatment of Severe Acute Respiratory Syndrome Caused by Coronavirus Disease 2019 (COVID-19). There were 135 patients studied. Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7543361/ "Patients were randomized to receive NAC 21 g (approximately 300 mg/kg) for 20 hours, or dextrose 5%." They concluded that NAC didn't work but they also gave HUGE amounts to people, 21 grams. Normal amounts are 400mg per person 3x a day. The enormous amount of NAC given to people may be the actual problem.

Summary

Yes NAC can help COVID-19 but it works best as a preventative or as soon as one gets any symptoms at all.

More links

Search for NAC to treat COVID-19. 83 results. https://pubmed.ncbi.nlm.nih.gov/?term=n-acetylcysteine+covid+treatment