can glutathione cause elevated liver enzymes Disruption in metabolism and altered energy production in the and kidney after ischemic acute kidney injury in mice can glutathione cause elevated liver

Although IV and oral acetylcysteine are equally effective for this indication, oral administration is generally poorly tolerated due to the higher dosing required to overcome its low oral bioavailability, [26] its foul taste and odor, and a higher incidence of adverse effects when taken orally, particularly nausea and vomiting

PubMed PMID: 24849688.

Improved Cognitive Function B12 supports brain health and cognitive performance through several mechanisms: Maintains myelin sheaths that protect and insulate nerves Supports neurotransmitter production and regulation Enhances blood flow and oxygen delivery to the brain Reduces homocysteine levels (elevated levels are linked to cognitive decline) Many clients report better concentration, improved memory, and greater mental clarity after beginning B12 therapy

But "supports immune cell function" is a biochemical statement, not proof that IV glutathione prevents or shortens illness