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What it is VIP is a naturally occurring neuropeptide involved in communication between the nervous system, immune system, and gut. What it’s known for Supports neuro-immune balance Plays a role in gut motility and absorption Influences vasodilation (blood flow signaling) Involved in circadian rhythm and stress signaling Why people talk about it VIP sits at the intersection of brain ↔ gut ↔ immune signaling, which is why it shows up in discussions around bio-optimization and recovery-focused research. Quick notes Short half-life Very signaling-specific Typically discussed in advanced protocols