He went on Palumbo's show and claimed it was from the peptide but I don't think it was for at least a couple reasons. First of all he said he was injecting in the lower back near the kidneys and well it doesn't spread to the kidneys like that, there is tissue and membranes protecting the kidneys it would have to hit systemic circulation first. And secondly when bodybuilders have kidney issues it's almost always due to “focal segmental glomerulosclerosis,” which is a blood pressure thing.The major cause of his kidney damage was from a fat burning peptide adipotide I think was the name. Hypertension definitely didn’t help, but it was more of an acute thing caused by the peptide.
Lastly, listen to Bostin's own words, I've linked to the relevant portion of the video at 1050 seconds in:
View: https://www.youtube.com/watch?v=ICEw0K6tC3g&t=1050s
