The problem with taking these products is that their manufacture is not regulated. In other words, you don't really know what's in them, or how much of what you're getting. Whether you take them together, or separately, if you don't know what you're taking, or how much, it's an iffy situation at best.
I'd talk to your doctor before you took either of these products, together or separately. They do have effects on the body's chemical makeup, and can be dangerous for some people.