Most recovery peptides are prohibited in tested sport, and a positive test can bring a multi year ban
Immune Support: It strengthens the immune system by enhancing the function of white blood cells and supporting the production of cytokines, essential for fighting infections
Cell Mol Immunol 19:158176 Hayashi PH, Lucena MI, Fontana RJ, Bjornsson ES, Aithal GP, Barnhart H et al (2022) A revised electronic version of RUCAM for the diagnosis of DILI
182 ATR-Seckel syndrome is an autosomal recessive disease that is characterized by developmental delay and remarkable microcephaly
doi: 10.1093/gerona/glaa204 9 ShadelGSHorvathTL
And like you say, the B12 might not be the cause