No, the FDA has not approved Glutathione IV treatment
PubMed Goldstein, A.L., Hannappel, E., Sosne, G., & Kleinman, H.K
They are looking at potential side effects, how the body responds over time, and whether any rare side effects might show up in larger groups of people

Specific concerns for Crohn's patients include: Nausea and vomiting : May exacerbate existing symptoms or lead to dehydration, particularly concerning in patients with active disease Diarrhea : Difficult to differentiate from Crohn's-related diarrhea, potentially delaying recognition of disease flares Abdominal pain : May mask or mimic Crohn's-related pain, complicating clinical assessment Reduced oral intake : Appetite suppression combined with nausea may worsen nutritional deficiencies common in IBD Additional FDA-labeled risks include: Acute gallbladder disease : Cholelithiasis and cholecystitis occur more frequently with semaglutide, particularly with rapid weight loss [12] [15] Acute kidney injury : Dehydration from gastrointestinal side effects may lead to kidney injury Pancreatitis : Patients should be monitored for severe, persistent abdominal pain, sometimes radiating to the back Rare but serious gastrointestinal adverse events reported in post-marketing surveillance include cases of bowel obstruction and ileus

Are compounded or non-FDA GLP-1s discussed
It is a hormone that helps control your blood sugar