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Always talk to a doctor before starting B12 supplements, even more so if you have health issues

Frasca Journal: Annals of the New York Academy of Sciences Journal ranking: Q1 Key takeaways: Injecting synthetic thymic peptides into aging mice can increase T-cell functions and cytokine production, potentially improving immune responses

A new classification of prodrugs: regulatory perspectives
Cancer 88 , 951956 (2003)
