To calculate the overall star rating and percentage breakdown by star, we don’t 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.
LOVE this book! I had heard about it on Jillians podcast and decided to order it. I had never given much thought as to what could be in my makeup products. Overall it was a great read and extremely helpful!