Are there classes of steroids that interact with OPC?

Hello. I want to take an OPC (oligomeric proanthocyanidins) supplement which usually contains grape seed extract, pine bark extract (pycnogenol), and other antioxidants. I heard many positive things about them including antioxidant properties, immune building, anti inflammatory, etc. I've read that these should not be taken with steroids (specifically for me, testosterone replacement) but am not sure why. The only information I've received is not to take them and wait 4-6 weeks after taking a steroid. Are there certain classes of steroids that specifically interact with OPC? Does this mean I should not be taking ANY antioxidants? Some people have suggested they could actually help prevent the liver and heart damage steroids cause. It feels like "better safe than sorry" advice that could prevent me from experiencing benefits from this product. Thank you for your help.