what about ghk cu GHK-Cu for Anti-Aging: Does This Copper Peptide Really Work? GHK-Cu Formulation & Manufacturing Expert
Description
Since glutathione is made from the amino acids cysteine, glycine, and glutamic acid, you can consume foods with those amino acids to boost glutathione production

Stacking GHK-Cu: Synergies with Other Peptides and Treatments GHK-Cus efficacy can be amplified when used in combination with other regenerative therapies

The picture shown is Twinlab Super B-Complex Regular Formula, preferred over the herbal formula because not all the herbal ingredients have been tested with cats

Then massage it in place

Foods rich in vitamin B12 include mushrooms, nutritional yeast and animal products such as meat, dairy, butter and eggs