What FDA's Latest mRNA Approvals Tell Us About CMC Expectations

FDA guidance documents tell you what the agency thinks it wants. Chemistry Review decisions tell you what the agency actually requires in practice. The gap between those two sources of truth is where IND submissions get into trouble.

Why Chemistry Review Decisions Matter More Than Guidance Docs

FDA guidance is drafted by policy teams and often lags the scientific frontier. Chemistry Reviews are written by the same reviewers who will read your IND — they reflect current expectations and evolving analytical standards.