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Specific knockout of CDH13 in 5-HT neurons increases neuronal density in the dorsal raphe and prefrontal cortex innervation, leading to delayed learning and impulsive-like behavior in mice [44]

doi: 10.4061/2011/327089 212 ZielenSTrischlerJSchubertR

All other evidence is from rodent and in vitro models

The bioavailability question fundamentally determines whether nasal spray can deliver results comparable to injection

In anaesthetized adult male Wistar rats (225-250 g), the right sciatic nerve was exposed, cleared of connective tissue and transected 5 cm distally to the sciatic notch

TB-500 vs BPC-157 alone While they work synergistically together, each peptide can be used independently: Choose TB-500 if: Your injury involves multiple sites or you want systemic healing support