And it exposes something most testing simply doesnt capture: Purity does not equal performance in solution Three Vials, One Problem In the example above from Jan 2025 ( when I was still in Swiss) BAC (bacteriostatic water) cloudy Filtered water mostly clear Saline particles still visible Same vial
[DOI] [PMC free article] [PubMed] [Google Scholar] Bagheri S
Mosley GE, Wang M, Nasser P et al
The systematic review protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO), registration number: CRD42024554513 (Available from) (NIHR, 2025)
It was a retrospective analysis conducted at a single center with a relatively small sample size, which may introduce selection bias
However, sleep architecture improvements may take several nights to become noticeable