The Vitamin C in these injections is great for many things, including the immune system
Quantified Metrics of Gastric Emptying Delay by Glucagon-Like Peptide-1 Receptor Agonists
vii , viii Conversely, studies in numerous species of animals have shown that boosting glutathione levels results in better health and increased longevity, and analyses in humans indicate that higher glutathione levels are associated with better health and increased longevity
Alizadeh M, Bavananthasivam J, Shojadoost B, Astill J, Taha-Abdelaziz K, Alqazlan N, Boodhoo N, Shoja Doost J, Sharif S (2021) In ovo and oral administration of probiotic lactobacilli modulate cell- and antibody-mediated immune responses in newly hatched chicks