Complex sentence: It has been suggested that vitamin D may induce beneficial effects on diabetic complications by modulating differentiation and growth of pancreatic β-cells and protecting these cells from apoptosis, thus improving β-cells functions and survival.
Split into simpler sentences: It has been suggested that vitamin D may induce a beneficial effects on diabetic complications by several mechanisms. Firstly; it could modulate differentiation and growth of pancreatic β-cells and it may also protect these cells from apoptosis, thus improving β-cells functions and survival.