A 2018 NIH-sponsored study, called the Dry Eye Assessment and Management (DREAM) study, tested omega-3 supplements for a full year in 535 study participants with moderate-to-severe dry eye disease
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Their conclusion after 5 years of observation: high concentrations of glutathione in the blood are characteristic of long-lived women
For oral vs injectable route evidence, see BPC-157 Oral vs Injectable
doi:10.1016/j.fct.2020.111372 Yang L, Zhang H, Zhang X, et al
Plasma exosomes and contained miRNAs affect the reproductive phenotype in polycystic ovary syndrome