My fear, preventing me from using cheap nutes (like Jacks) is, not knowing what is the quality the elements used (where they are sourced). My company formulates our own pet health products, buying the individual ingredients (vitamins/minerals/enzymes...) I can tell you the quality varies tremendously (generally speaking, the better the quality, the higher the cost), and one has to know what the difference. Choose Wisely
IF the elements/ingredients re not top shelf they could affect the quality on a cellular level, which may not be detected with the eye