Various studies have confirmed that the S-Acetyl form is better absorbed through the intestinal wall, as its acetyl bond prevents oxidation and helps the molecule to enter the cells directly after absorption in the intestine
Intravenous (IV) glutathione the most common method for brightening
Nature 199 , 784787 (1963)
B12 shots deliver a concentrated amount of cobalamin, a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis, as detailed in the NIH fact sheet on vitamin B12
Presented for research literature review only Farkas MH et al
B12 can also lead to improved mental functions like memory and concentration, better sleep, less stress, and even healthy skin, hair, and nails