does dietary protein interfere with glutathione supplement absorption in Our Diet and Its Role in the Body: From Disease Prevention to Anti-Aging Oxalate homeostasis | Nature Reviews

Zhu Y, Wang J, Li X, Zhao D, Sun J, Liu X

Vitamin B12 deficiency can be caused by not getting enough of it, problems with absorbing it, or taking a medication that interferes with its absorption.

You will follow this eating plan (along with the meds your Functional M.D

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Watch for Signs of Copper Toxicity While GHK-Cu is generally well tolerated, overexposure to copper (especially in individuals with impaired detox pathways) can cause symptoms such as: Nausea or gastrointestinal upset Headaches Mood swings or irritability Metallic taste in the mouth If any of these symptoms occur, discontinue use and contact your healthcare provider