Cyanocobalamin and hydroxocobalamin are the top choices
Tuftsin: Its chemistry, biology, and clinical potential
Others (Saccharomyces boulardii, many shelf-stable blends) are designed to remain potent at room temperature
Manag Care 22:7172 Niessl C, Boulesteix AL, Oh J, Palm K, Schlingmann P, Wygoda S, Haffner D, Wuhl E, Tonshoff B, Buescher A, Billing H, Hoppe B, Zirngibl M, Kettwig M, Moeller K, Acham-Roschitz B, Arbeiter K, Bald M, Benz M, Galiano M, John-Kroegel U, Klaus G, Marx-Berger D, Moser K, Mueller D, Patzer L, Pohl M, Seitz B, Treikauskas U, von Vigier RO, Gahl WA, Hohenfellner K (2022) Relationship between age at initiation of cysteamine treatment, adherence with therapy, and glomerular kidney function in infantile nephropathic cystinosis