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Collagen is important for tendons, ligaments, and muscles so its a main focus in laboratory investigations

Basic fibroblast growth factor (bFGF) protects the blood-brain barrier by binding of FGFR1 and activating the ERK signaling pathway after intra-abdominal hypertension and traumatic brain injury

Furthermore, zinc as a male fertility supplement has been associated with a significant increase in semen volume, sperm motility, and normal sperm morphology especially in combination with folate, according to multiple studies

Limited human data: small intranasal study showing measurable changes in resting-state network findings shortly after dosing