One of our members had some good results with some form of N-Acetyl-L-Cysteine with digestive problems. So I started researching it. It turns out it a precursor to the amino acid cysteine which is a building block for glutathione. Glutathione (in some studies) seems to help with breathing problems ( in some people).

It has been found to be low in some people with lung problems. I think I will give it a try as I may have low glutathione due to five different severe stresses in 2023. It was the following February I started having 3 month long bouts of the SOB/racing heart at night when or after sick with Covid. Stress can lower glutathione in the body. Just something to research.