This is the bidirectional communication system between the gastrointestinal tract and the central nervous system
B12 is 659pg/mL and folate is the same (this was 4 days after my most recent injection), also taking a B-complex vitamin daily with 15mcg of b12
A 12-week, double-blind, placebo-controlled facial study (71 women) documented a 55.8% reduction in wrinkle volume with GHK-Cu, significantly surpassing Matrixyl (-31.6%) and placebo
Here's the problem - many forms of glutathione supplements are poorly bioavailable with absorption issues
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doi:10.1007/s00203-021-02414-3