The peptides relatively short half-life in the bloodstream does not affect its stability in storage, but certain conditions can degrade it quickly
S., Park, S., Lee, M
Environmental Toxins: Exposure to high levels of infectious microbes, environmental chemicals such as plasticizers, pesticides, herbicides, personal care products, heavy metals, and biotoxins such as mold, viruses, and parasites wear down the bodys glutathione levels, alter the gut microflora and increase inflammatory activity in the body (26, 27, 28)
Liao et al., 2021), and one study used tDCS+cycling (Conceio et al., 2021)
doi: 10.1038/s41598-020-59364-x 360 TherriaultJ.BenedetA