You did the research. Nobody told you it expires.

Your knowledge decays on a curve from the day you acquire it, and nothing notifies you when the evidence moves. The manufacturer knows. The regulator knows. Your supplier is not going to email you. Senzu puts your compounds under standing review: recalls, side effect reports and evidence changes, matched to your profile and tied to dated primary sources. The public list is FDA-regulated peptide vendors. Research vendors stay with an account. The watching is the product.