glutathione suggested dosage recommended of dose iv and frequency vary depending on individual needs and health goals Glutathione: Benefits and Supplements – Glutathione: Uses, Side Effects, Precautions

You mention you've had iron deficiency in the past, along with others

The answer determines the protocol

Digestion-based DNA methylation analysis Percentage DNA methylation was assessed at CpG sites across CpG islands in CYP2R1, CYP27A1, CYP27B1, CYP24A1, and VDR genes using Qiagen EpiTect II methylation enzyme kits and PCR assays at the concentrations and cycle conditions recommended by the manufacturer

"Low plasma vitamin B12 in pregnancy is associated with gestational 'diabesity' and later diabetes"

A multitude of studies shows that many people are unable to absorb or store sufficient amounts of vitamin B12

Animal foods are the best food sources of vitamin B12, consisting of natural grass-fed dairy items, cage-free eggs, grass-fed meat, wild-caught fish, organic chicken as well as organ meats