To calculate the overall star rating and percentage breakdown by star, we do not use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
The mfg & exp date differs on the cover and the product. On the cover : mfg - 6/7/2021 & exp - 4/7/2023 On the product : mfg - 3/9/2020 & exp - 3/4/2023. Though the expiry is within the specified period., But it's still misleading.