I am looking to treat cells with usual LDL-C, but I want to ensure that the cholesterol that I treat with is not highly oxidized. I purchased a couple of commercially available usual LDL-C samples and compared the concentrations of MDA in the samples to that of commercially available oxidized LDL-C samples. Unfortunately, I found that the usual LDL-C samples were heavily oxidized (comparable to the oxidized LDL-C samples). It seems that most companies don't seem to provide specifications on their usual LDL-C oxidation. Is anyone aware of a commercially available LDL-C sample that is not highly oxidized?

Thanks!