I don't know anything about the Purina Beyond one but the other Purina products have the following listed:
By-products,
Artificial preservatives
According to
Dog Food Comparison Chart - Dog Food Ratings of Premium Dog Food and Supermarket.
It was given a 0 on this site. I just switched recently from Wellness to Instinct. Rosie likes the Instinct and we are not having any problems. Well, that is as long as I buy the chicken flavor. She don't like the turkey and duck. I would check ratings on the foods if I were you. Wellness is a much better brand than Purina.