Weight Loss Products Not Approved by Amazon

I added some products not listed on Amazon, specifically Garcinia Cambogia and Keto Blend, I purchased from a white label manufacturer that provided me with a Certificate of Analysis but Amazon rejected the files multiple times and insists I pay for a third party lab analysis…any experience with this? I have considered listing in a different category, these tests are thousands of dollars and I’m just now in the phase where I’m testing business feasibility.