Given the task definition and input, reply with output. In this task, you're given a review from Amazon. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral, 4: good, 5: extremely good.

Not quite sure how to review this, haven't taken it long enough to know if it is protecting my skin against the harmful UV rays, or helping with regeneration yet. I do know that my dermatologist endorsed taking this, so I'm trying it. I do think the pills are large and tend to stick in your throat, so one at a time with extra water.
4