iv glutathione injection results for skin lightening: a regnant myth or evidence-based verity? Glutathione treatment for face whitening

While the kidney is traditionally known as the primary site for 1,25(OH) 2 VD production, recent research reveals the presence of CYP27B1 in non-renal cells and tissues, suggesting localized formation of 1,25(OH) 2 VD and its tissue-specific paracrine role across various tissues [7]

Yes, taking glutathione alongside Vitamin C is highly recommended

Mol Neurodegener 6(1):110 Brigelius-Floh R (2006) Glutathione peroxidases and redox-regulated transcription factors

Studies suggest that oral BPC-157 interacts with the nitric oxide system, VEGF signaling, and growth factor receptor pathways in gastrointestinal tissue

Nature 575 , 669673 (2019)