Its only been 4 days but i can already see some smoothness throughout my face

I chose to get botox as a preventive procedure and to help with my current lines. I have lines when i make facial expressions (no current lines at rest). Before i booked a consultation i was afraid the provider would inject too much at first. But when i went in they were very carful to start out at a low dose (25 units total). I was injected on my forehead (12 units), eleven lines(9 units) and crows feet (4 units). I already have been taking collagen everyday (For at least 1 year now) to help with my skins elasticity. Its only been 4 days but i can already see some smoothness throughout my face.